Gene Association: SPR
UniProt Search:
SPR (PROTEIN_CODING)
Function Description: sepiapterin reductase
found 73 associated metabolites with current gene based on the text mining result from the pubmed database.
5-Hydroxy-L-tryptophan
5-Hydroxy-L-tryptophan is an aromatic amino acid naturally produced by the body from the essential amino acid L-tryptophan. 5-Hydroxy-L-tryptophan is the immediate precursor of the neurotransmitter serotonin. The conversion to serotonin is catalyzed by the enzyme aromatic L-amino acid decarboxylase (EC 4.1.1.28) (AADC1 also known as DOPA decarboxylase), an essential enzyme in the metabolism of the monoamine neurotransmitters. An accumulation of 5-hydroxy-L-tryptophan in cerebrospinal fluid occurs in aromatic L-amino acid decarboxylase deficiency (AADC deficiency) (OMIM: 608643) accompanied by an increased excretion in the urine of the patients, which are indicative of the disorder but not specific. 5-Hydroxy-L-tryptophan is also increased in other disorders such as in Parkinsons patients with severe postural instability and gait disorders. The amount of endogenous 5-hydroxy-L-tryptophan available for serotonin synthesis depends on the availability of tryptophan and on the activity of various enzymes, especially tryptophan hydroxylase (EC 1.14.16.4), indoleamine 2,3-dioxygenase (EC 1.13.11.52), and tryptophan 2,3-dioxygenase (TDO) (EC 1.13.11.11). 5-Hydroxy-L-tryptophan has been used clinically for over 30 years. In addition to its use in the treatment of depression, the therapeutic administration of 5-hydroxy-L-tryptophan has been shown to be effective in treating a wide variety of conditions, including fibromyalgia, insomnia, binge eating associated with obesity, cerebellar ataxia, and chronic headaches. 5-Hydroxy-L-tryptophan easily crosses the blood-brain barrier and effectively increases central nervous system (CNS) synthesis of serotonin. Supplementation with 5-hydroxy-L-tryptophan is hypothesized to normalize serotonin synthesis, which is putatively related to its antidepressant properties (PMID: 9295177, 17240182, 16023217). When present in sufficiently high levels, 5-hydroxytryptophan can be a neurotoxin and a metabotoxin. A neurotoxin is a compound that disrupts or attacks neural cells or tissue. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Signs and symptoms of AADC deficiency generally appear in the first year of life. Affected infants may have severe developmental delay, weak muscle tone (hypotonia), muscle stiffness, difficulty moving, and involuntary writhing movements of the limbs (athetosis). They may be lacking in energy (lethargic), feed poorly, startle easily, and have sleep disturbances. Since 5-hydroxytryptophan is a precursor to serotonin, altered levels of serotonin can accumulate in the brain, which leads to abnormal neural signalling. Infants with AADC deficiency have very low levels of neural signalling molecules while individuals who consume high levels of 5-hydroxytryptophan will have very high levels of neural signalling molecules. Both conditions can lead to vomiting, nausea, extreme drowsiness, and lethargy. 5-Hydroxytryptophan (5-HTP), also known as oxitriptan (INN) is sold over-the-counter in the United Kingdom, the United States, and Canada as a dietary supplement for use as an antidepressant, appetite suppressant, and sleep aid. It is also marketed in many European countries for the indication of major depression under trade names such as Cincofarm, Levothym, Levotonine, Oxyfan, Telesol, Tript-OH, and Triptum. Several double-blind placebo-controlled clinical trials have demonstrated the effectiveness of 5-HTP in the treatment of depression, though a lack of high-quality studies has been noted. More and larger studies are needed to determine if 5-HTP is truly effective in treating depression. 5-hydroxy-L-tryptophan is the L-enantiomer of 5-hydroxytryptophan. It has a role as a human metabolite, a plant metabolite and a mouse metabolite. It is a 5-hydroxytryptophan, a hydroxy-L-tryptophan and a non-proteinogenic L-alpha-amino acid. It is an enantiomer of a 5-hydroxy-D-tryptophan. It is a tautomer of a 5-hydroxy-L-tryptophan zwitterion. 5-Hydroxytryptophan (5-HTP), also known as oxitriptan (INN), is a naturally occurring amino acid and metabolic intermediate in the synthesis of serotonin and melatonin. 5-HTP is sold over-the-counter in the United Kingdom, United States and Canada as a dietary supplement for use as an antidepressant, appetite suppressant, and sleep aid, and is also marketed in many European countries for the indication of major depression under trade names like Cincofarm, Levothym, Levotonine, Oxyfan, Telesol, Tript-OH, and Triptum. Several double-blind placebo-controlled clinical trials have demonstrated the effectiveness of 5-HTP in the treatment of depression, though a lack of high quality studies has been noted. More study is needed to determine efficacy in treating depression. Oxitriptan is an aromatic amino acid with antidepressant activity. In vivo, oxitriptan (or 5-hydroxytryptophan) is converted into 5-hydroxytryptamine (5-HT or serotonin) as well as other neurotransmitters. Oxitriptan may exert its antidepressant activity via conversion to serotonin or directly by binding to serotonin (5-HT) receptors within the central nervous system (CNS). Endogenous oxitriptan is produced from the essential amino acid L-tryptophan. The exogenous therapeutic form is isolated from the seeds of the African plant Griffonia simplicifolia. The immediate precursor in the biosynthesis of SEROTONIN from tryptophan. It is used as an antiepileptic and antidepressant. See also: ... View More ... 5-Hydroxytryptophan (5-HTP), also known as oxitriptan (INN), is a naturally-occurring amino acid and chemical precursor as well as metabolic intermediate in the biosynthesis of the neurotransmitters serotonin and melatonin from tryptophan. 5-Hydroxy-L-tryptophan is found in french plantain. 5-Hydroxy-L-tryptophan. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=4350-09-8 (retrieved 2024-07-02) (CAS RN: 4350-09-8). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). L-5-Hydroxytryptophan (L-5-HTP), a naturally occurring amino acid and a dietary supplement for use as an antidepressant, appetite suppressant, and sleep aid, is the immediate precursor of the neurotransmitter serotonin and a reserpine antagonist[1]. L-5-Hydroxytryptophan (L-5-HTP) is used to treat fibromyalgia, myoclonus, migraine, and cerebellar ataxia[2][3][4][5].
5-Hydroxytryptophan
5-hydroxytryptophan is a tryptophan derivative that is tryptophan substituted by a hydroxy group at position 5. It has a role as a human metabolite and a neurotransmitter. 5-Hydroxytryptophan, DL- is a racemic mixture of 5-hydroxytryptophan (5-HTP), a precursor to the neurotransmitter serotonin with anti-depressant, analgesic and appetite-suppressant activities. DL-5-HTP is decarboxylated to serotonin by aromatic-L-amino-acid decarboxylase, and results in increased serotonin levels within the brain. Mediated through serotonin receptors, elevated levels of serotonin causes increased serotonin neurotransmissions, hence leading to release of depression, pain and appetite. 5-Hydroxy-L-tryptophan is an aromatic amino acid naturally produced by the body from the essential amino acid l-tryptophan. 5-Hydroxy-L-tryptophan is the immediate precursor of the neurotransmitter serotonin. The conversion to serotonin is catalyzed by the enzyme aromatic l-amino acid decarboxylase (EC 4.1.1.28, AADC1 also known as dopa decarboxylase), an essential enzyme in the metabolism of the monoamine neurotransmitters. An accumulation of 5-Hydroxy-L-tryptophan in cerebrospinal fluid occurs in Aromatic l-amino acid decarboxylase deficiency (OMIM 608643), accompanied by an increased excretion in the urine of the patients, which are indicative of the disorder but not specific 5-Hydroxy-L-tryptophan is also increased in other disorders such as in Parkinsons patients with severe postural instability and gait disorders. Confirmation of the diagnosis AADC deficiency is then required by enzyme activity measurement or genetic analysis. The amount of endogenous 5-Hydroxy-L-tryptophan available for serotonin synthesis depends on the availability of tryptophan and on the activity of various enzymes, especially tryptophan hydroxylase (EC 1.14.16.4), indoleamine 2,3-dioxygenase (EC 1.13.11.52), and tryptophan 2,3-dioxygenase. (EC 1.13.11.11, TDO). 5-Hydroxy-L-tryptophan has been used clinically for over 30 years. In addition to depression, the therapeutic administration of 5-Hydroxy-L-tryptophan has been shown to be effective in treating a wide variety of conditions, including fibromyalgia, insomnia, binge eating associated with obesity, cerebellar ataxia, and chronic headaches. 5-Hydroxy-L-tryptophan easily crosses the blood-brain barrier and effectively increases central nervous system (CNS) synthesis of serotonin. Supplementation with 5-Hydroxy-L-tryptophan is hypothesized to normalize serotonin synthesis, which is putatively related to its antidepressant properties. (A3384, A3385, A3386). The immediate precursor in the biosynthesis of SEROTONIN from tryptophan. It is used as an antiepileptic and antidepressant. D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D000928 - Antidepressive Agents A tryptophan derivative that is tryptophan substituted by a hydroxy group at position 5. 5-Hydroxytryptophan, a tryptophan metabolite, is a direct 5-hydroxytryptamine (5-HT) precursor and an L-aromatic amino acid decarboxylase substrate. [1][2][3]. 5-Hydroxytryptophan, a tryptophan metabolite, is a direct 5-hydroxytryptamine (5-HT) precursor and an L-aromatic amino acid decarboxylase substrate. [1][2][3].
Cimitin
Cimifugin is an oxacycle and an organic heterotricyclic compound. Cimifugin is a natural product found in Eranthis cilicica, Ostericum grosseserratum, and other organisms with data available. Cimifugin (Cimitin) is a bioactive component of Cimicifuga racemosa, a Chinese herb. Cimifugin suppresses allergic inflammation by reducing epithelial derived initiative key factors via regulating tight junctions[1]. Cimifugin reduces the migration and chemotaxis of RAW264.7 cells and inhibits the release of inflammatory factors and activation of MAPKs and NF-κB signaling pathways induced by LPS[2]. Cimifugin (Cimitin) is a bioactive component of Cimicifuga racemosa, a Chinese herb. Cimifugin suppresses allergic inflammation by reducing epithelial derived initiative key factors via regulating tight junctions[1]. Cimifugin reduces the migration and chemotaxis of RAW264.7 cells and inhibits the release of inflammatory factors and activation of MAPKs and NF-κB signaling pathways induced by LPS[2].
Glycyrrhetinic acid
Glycyrrhetinic acid is a pentacyclic triterpenoid that is olean-12-ene substituted by a hydroxy group at position 3, an oxo group at position 11 and a carboxy group at position 30. It has a role as an immunomodulator and a plant metabolite. It is a pentacyclic triterpenoid, a cyclic terpene ketone and a hydroxy monocarboxylic acid. It is a conjugate acid of a glycyrrhetinate. It derives from a hydride of an oleanane. Enoxolone (glycyrrhetic acid) has been investigated for the basic science of Apparent Mineralocorticoid Excess (AME). Enoxolone is a natural product found in Glycyrrhiza, Echinopora lamellosa, and other organisms with data available. Enoxolone is a pentacyclic triterpenoid aglycone metabolite of glycyrrhizin, which is a product of the plant Glycyrrhiza glabra (licorice), with potential expectorant, and gastrokinetic activities. After administration, enoxolone inhibits the metabolism of prostaglandins by both 15-hydroxyprostaglandin dehydrogenase [NAD(+)] and prostaglandin reductase 2. Therefore, this agent potentiates the activity of prostaglandin E2 and F2alpha, which inhibits gastric secretion while stimulating pancreatic secretion and the secretion of intestinal and respiratory mucus, leading to increased intestinal motility and antitussive effects. Additionally, this agent inhibits 11 beta-hydroxysteroid dehydrogenase and other enzymes involved in the conversion of cortisol to cortisone in the kidneys. An oleanolic acid from GLYCYRRHIZA that has some antiallergic, antibacterial, and antiviral properties. It is used topically for allergic or infectious skin inflammation and orally for its aldosterone effects in electrolyte regulation. See also: Glycyrrhizin (is active moiety of); Glycyrrhiza Glabra (part of). Glycyrrhetinic acid is a pentacyclic triterpenoid derivative of the beta-amyrin type obtained from the hydrolysis of glycyrrhizic acid, which was first obtained from the herb liquorice. It is used in flavouring and it masks the bitter taste of drugs like aloe and quinine. It is effective in the treatment of peptic ulcer and also has expectorant (antitussive) properties (PMID:32106571). In glycyrrhetinic acid the functional group (R) is a hydroxyl group. Research in 2005 demonstrated that with a proper functional group a very effective glycyrrhetinic artificial sweetener can be obtained. When R is an anionic NHCO(CH2)CO2K side chain, the sweetening effect is found to 1200 times that of sugar (human sensory panel data). A shorter or longer spacer reduces the sweetening effect. One explanation is that the taste bud cell receptor has 1.3 nanometers (13 angstroms) available for docking with the sweetener molecule. In addition the sweetener molecule requires three proton donor positions of which two reside at the extremities to be able to interact efficiently with the receptor cavity. 18α-Glycyrrhetinic acid, a diet-derived compound, is an inhibitor of NF-kB and an activator of proteasome, which serves as pro-longevity and anti-aggregation factor in a multicellular organism. 18α-Glycyrrhetinic acid induces apoptosis[1][2]. 18α-Glycyrrhetinic acid, a diet-derived compound, is an inhibitor of NF-kB and an activator of proteasome, which serves as pro-longevity and anti-aggregation factor in a multicellular organism. 18α-Glycyrrhetinic acid induces apoptosis[1][2]. 18β-Glycyrrhetinic acid is the major bioactive component of Glycyrrhiza uralensis and possesses anti-ulcerative, anti-inflammatory and antiproliferative properties. 18β-Glycyrrhetinic acid is the major bioactive component of Glycyrrhiza uralensis and possesses anti-ulcerative, anti-inflammatory and antiproliferative properties.
Homovanillate
CONFIDENCE standard compound; INTERNAL_ID 182 COVID info from PDB, Protein Data Bank KEIO_ID H059 Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Homovanillic acid is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency. Homovanillic acid is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency.
L-Dopa
L-dopa is an optically active form of dopa having L-configuration. Used to treat the stiffness, tremors, spasms, and poor muscle control of Parkinsons disease It has a role as a prodrug, a hapten, a neurotoxin, an antiparkinson drug, a dopaminergic agent, an antidyskinesia agent, an allelochemical, a plant growth retardant, a human metabolite, a mouse metabolite and a plant metabolite. It is a dopa, a L-tyrosine derivative and a non-proteinogenic L-alpha-amino acid. It is a conjugate acid of a L-dopa(1-). It is an enantiomer of a D-dopa. It is a tautomer of a L-dopa zwitterion. Levodopa is a prodrug of dopamine that is administered to patients with Parkinsons due to its ability to cross the blood-brain barrier. Levodopa can be metabolised to dopamine on either side of the blood-brain barrier and so it is generally administered with a dopa decarboxylase inhibitor like carbidopa to prevent metabolism until after it has crossed the blood-brain barrier. Once past the blood-brain barrier, levodopa is metabolized to dopamine and supplements the low endogenous levels of dopamine to treat symptoms of Parkinsons. The first developed drug product that was approved by the FDA was a levodopa and carbidopa combined product called Sinemet that was approved on May 2, 1975. 3,4-Dihydroxy-L-phenylalanine is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). Levodopa is an Aromatic Amino Acid. Levodopa is an amino acid precursor of dopamine with antiparkinsonian properties. Levodopa is a prodrug that is converted to dopamine by DOPA decarboxylase and can cross the blood-brain barrier. When in the brain, levodopa is decarboxylated to dopamine and stimulates the dopaminergic receptors, thereby compensating for the depleted supply of endogenous dopamine seen in Parkinsons disease. To assure that adequate concentrations of levodopa reach the central nervous system, it is administered with carbidopa, a decarboxylase inhibitor that does not cross the blood-brain barrier, thereby diminishing the decarboxylation and inactivation of levodopa in peripheral tissues and increasing the delivery of dopamine to the CNS. L-Dopa is used for the treatment of Parkinsonian disorders and Dopa-Responsive Dystonia and is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system. Peripheral tissue conversion may be the mechanism of the adverse effects of levodopa. It is standard clinical practice to co-administer a peripheral DOPA decarboxylase inhibitor - carbidopa or benserazide - and often a catechol-O-methyl transferase (COMT) inhibitor, to prevent synthesis of dopamine in peripheral tissue.The naturally occurring form of dihydroxyphenylalanine and the immediate precursor of dopamine. Unlike dopamine itself, it can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to dopamine. It is used for the treatment of parkinsonian disorders and is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system. [PubChem]L-Dopa is the naturally occurring form of dihydroxyphenylalanine and the immediate precursor of dopamine. Unlike dopamine itself, L-Dopa can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to dopamine. In particular, it is metabolized to dopamine by aromatic L-amino acid decarboxylase. Pyridoxal phosphate (vitamin B6) is a required cofactor for this decarboxylation, and may be administered along with levodopa, usually as pyridoxine. The naturally occurring form of DIHYDROXYPHENYLALANINE and the immediate precursor of DOPAMINE. Unlike dopamine itself, it can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to DOPAMINE. It is used for the treatment of PARKINSONIAN DISORDERS and is usually given with agents that inhibit its conversion to dopamine outside ... L-DOPA, also known as levodopa or 3,4-dihydroxyphenylalanine is an alpha amino acid. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon). L-DOPA is found naturally in both animals and plants. It is made via biosynthesis from the amino acid L-tyrosine by the enzyme tyrosine hydroxylase.. L-DOPA is the precursor to the neurotransmitters dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline), which are collectively known as catecholamines. The Swedish scientist Arvid Carlsson first showed in the 1950s that administering L-DOPA to animals with drug-induced (reserpine) Parkinsonian symptoms caused a reduction in the intensity of the animals symptoms. Unlike dopamine itself, L-DOPA can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to dopamine. In particular, it is metabolized to dopamine by aromatic L-amino acid decarboxylase. Pyridoxal phosphate (vitamin B6) is a required cofactor for this decarboxylation, and may be administered along with levodopa, usually as pyridoxine. As a result, L-DOPA is a drug that is now used for the treatment of Parkinsonian disorders and DOPA-Responsive Dystonia. It is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system. It is standard clinical practice in treating Parkinsonism to co-administer a peripheral DOPA decarboxylase inhibitor - carbidopa or benserazide - and often a catechol-O-methyl transferase (COMT) inhibitor, to prevent synthesis of dopamine in peripheral tissue. Side effects of L-DOPA treatment may include: hypertension, arrhythmias, nausea, gastrointestinal bleeding, disturbed respiration, hair loss, disorientation and confusion. L-DOPA can act as an L-tyrosine mimetic and be incorporated into proteins by mammalian cells in place of L-tyrosine, generating protease-resistant and aggregate-prone proteins in vitro and may contribute to neurotoxicity with chronic L-DOPA administration. L-phenylalanine, L-tyrosine, and L-DOPA are all precursors to the biological pigment melanin. The enzyme tyrosinase catalyzes the oxidation of L-DOPA to the reactive intermediate dopaquinone, which reacts further, eventually leading to melanin oligomers. An optically active form of dopa having L-configuration. Used to treat the stiffness, tremors, spasms, and poor muscle control of Parkinsons disease DOPA. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=59-92-7 (retrieved 2024-07-01) (CAS RN: 59-92-7). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). DL-Dopa is a beta-hydroxylated derivative of phenylalanine. DL-Dopa is a beta-hydroxylated derivative of phenylalanine.
Dicumarol
Dicoumarol is a hydroxycoumarin that is methane in which two hydrogens have each been substituted by a 4-hydroxycoumarin-3-yl group. Related to warfarin, it has been used as an anticoagulant. It has a role as a vitamin K antagonist, an anticoagulant, an EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor and a Hsp90 inhibitor. Dicoumarol is an oral anticoagulant agent that works by interfering with the metabolism of vitamin K. In addition to its clinical use, it is also used in biochemical experiments as an inhibitor of reductases. Dicumarol is a natural product found in Homo sapiens and Viola arvensis with data available. Dicumarol is a hydroxycoumarin originally isolated from molding sweet-clover hay, with anticoagulant and vitamin K depletion activities. Dicumarol is a competitive inhibitor of vitamin K epoxide reductase; thus, it inhibits vitamin K recycling and causes depletion of active vitamin K in blood. This prevents the formation of the active form of prothrombin and several other coagulant enzymes, and inhibits blood clotting. Dicumarol is only found in individuals that have used or taken this drug. It is an oral anticoagulant that interferes with the metabolism of vitamin K. It is also used in biochemical experiments as an inhibitor of reductases. [PubChem] Dicumarol inhibits vitamin K reductase, resulting in depletion of the reduced form of vitamin K (vitamin KH2). As vitamin K is a cofactor for the carboxylation of glutamate residues on the N-terminal regions of vitamin K-dependent proteins, this limits the gamma-carboxylation and subsequent activation of the vitamin K-dependent coagulant proteins. The synthesis of vitamin K-dependent coagulation factors II, VII, IX, and X and anticoagulant proteins C and S is inhibited. Depression of three of the four vitamin K-dependent coagulation factors (factors II, VII, and X) results in decresed prothrombin levels and a decrease in the amount of thrombin generated and bound to fibrin. This reduces the thrombogenicity of clots. An oral anticoagulant that interferes with the metabolism of vitamin K. It is also used in biochemical experiments as an inhibitor of reductases. Dicumarol is only found in individuals that have used or taken this drug. It is an oral anticoagulant that interferes with the metabolism of vitamin K. It is also used in biochemical experiments as an inhibitor of reductases. [PubChem]Dicumarol inhibits vitamin K reductase, resulting in depletion of the reduced form of vitamin K (vitamin KH2). As vitamin K is a cofactor for the carboxylation of glutamate residues on the N-terminal regions of vitamin K-dependent proteins, this limits the gamma-carboxylation and subsequent activation of the vitamin K-dependent coagulant proteins. The synthesis of vitamin K-dependent coagulation factors II, VII, IX, and X and anticoagulant proteins C and S is inhibited. Depression of three of the four vitamin K-dependent coagulation factors (factors II, VII, and X) results in decresed prothrombin levels and a decrease in the amount of thrombin generated and bound to fibrin. This reduces the thrombogenicity of clots. B - Blood and blood forming organs > B01 - Antithrombotic agents > B01A - Antithrombotic agents > B01AA - Vitamin k antagonists A hydroxycoumarin that is methane in which two hydrogens have each been substituted by a 4-hydroxycoumarin-3-yl group. D006401 - Hematologic Agents > D000925 - Anticoagulants > D015110 - 4-Hydroxycoumarins C78275 - Agent Affecting Blood or Body Fluid > C263 - Anticoagulant Agent D004791 - Enzyme Inhibitors > D014475 - Uncoupling Agents Isolated from Melilotus alba (white melilot)
Tetrahydrobiopterin
Tetrahydrobiopterin (CAS: 17528-72-2), also known as BH4, is an essential cofactor in the synthesis of neurotransmitters and nitric oxide (PMID: 16946131). In fact, it is used by all three human nitric-oxide synthases (NOS) eNOS, nNOS, and iNOS as well as the enzyme glyceryl-ether monooxygenase. It is also essential in the conversion of phenylalanine into tyrosine by the enzyme phenylalanine-4-hydroxylase; the conversion of tyrosine into L-dopa by the enzyme tyrosine hydroxylase; and the conversion of tryptophan into 5-hydroxytryptophan via tryptophan hydroxylase. Specifically, tetrahydrobiopterin is a cofactor for tryptophan 5-hydroxylase 1, tyrosine 3-monooxygenase, and phenylalanine hydroxylase, all of which are essential for the formation of the neurotransmitters dopamine, noradrenaline, and adrenaline. Tetrahydrobiopterin has been proposed to be involved in the promotion of neurotransmitter release in the brain and the regulation of human melanogenesis. A defect in BH4 production and/or a defect in the enzyme dihydropteridine reductase (DHPR) causes phenylketonuria type IV, as well as dopa-responsive dystonias. BH4 is also implicated in Parkinsons disease, Alzheimers disease, and depression. Tetrahydrobiopterin is present in probably every cell or tissue of higher animals. On the other hand, most bacteria, fungi and plants do not synthesize tetrahydrobiopterin (Wikipedia). A - Alimentary tract and metabolism > A16 - Other alimentary tract and metabolism products > A16A - Other alimentary tract and metabolism products > A16AX - Various alimentary tract and metabolism products C26170 - Protective Agent > C275 - Antioxidant Tetrahydrobiopterin ((Rac)-Sapropterin) is a cofactor of the aromatic amino acid hydroxylases enzymes and also acts as an essential cofactor for all nitric oxide synthase (NOS) isoforms.
d-Threo biopterin
6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
2-Amino-6-[(1R,2S)-1,2,3-trihydroxypropyl]-7,8-dihydro-3H-pteridin-4-one
7,8-Dihydroneopterin, an inflammation marker, induces cellular apoptosis in astrocytes and neurons via enhancement of nitric oxide synthase (iNOS) expression. 7,8-Dihydroneopterin can be used in the research of neurodegenerative diseases[1].
N-Acetylserotonin
N-Acetylserotonin (NAS), also known as normelatonin, is a naturally occurring chemical precursor and intermediate in the endogenous production of melatonin from serotonin. It also has biological activity in its own right, including acting as a melatonin receptor agonist, an agonist of the TrkB, and having antioxidant effects. N-Acetylserotonin is an intermediate in the metabolic pathway of melatonin and indoleamine in the pineal gland of mammalians. Serotonin-N-acetyltransferase (SNAT), which regulates the rate of melatonin biosynthesis in the pineal gland, catalyzes the acetylation of 5HT to N-acetylserotonin (NAS). A methyl group from S-adenosylmethionine is transferred to NAS by hydroxyindole-O-methyltransferase (HIOMT), and finally NAS is converted to 5-methoxy-N-acetyltryptamine, or melatonin. In most mammalian species the content of NAS (and melatonin) in the pineal gland shows clear circadian changes with the highest level occurring during the dark period. This elevation of the contents of NAS (and melatonin) in the dark period is due to the increase of SNAT activity and the elevation of SNAT gene expression. Experimental studies show that N-acetylserotonin possess free radical scavenging activity. Acute administration of irreversible and reversible selective MAO-A inhibitors and high doses (or chronic administration of low doses) of relatively selective MAO-B inhibitors (but not of highly selective MAO-B inhibitors) suppressed MAO-A activity and stimulated N-acetylation of pineal serotonin into N-acetylserotonin, the immediate precursor of melatonin. N-acetylserotonin increase after MAO-A inhibitors might mediate their antidepressive and antihypertensive effects. N-Acetylserotonin is the product of the O-demethylation of melatonin mediated by cytochrome P-450 isoforms: Cytochrome p450, subfamily IIc, polypeptide 19 (CYP2C19, a clinically important enzyme that metabolizes a wide variety of drugs), with a minor contribution from Cytochrome p450, subfamily I, polypeptide (2CYP1A2, involved in O-deethylation of phenacetin). (PMID 15616152, 11103901, 10721079, 10591054). N-Acetylserotonin acts as a potent antioxidant, NAS effectiveness as an anti-oxidant has been found to be different depending on the experimental model used, it has been described as being between 5 and 20 times more effect than melatonin at protecting against oxidant damage. NAS has been shown to protect against lipid peroxidation in microsomes and mitochondria. NAS has also been reported to lower resting levels of ROS in peripheral blood lymphocytes and to exhibit anti-oxidant effects against t-butylated hydroperoxide- and diamide-induced ROS. N-acetyl serotonin, also known as N-acetyl-5-hydroxytryptamine or N-(2-(5-hydroxy-1h-indol-3-yl)ethyl)acetamide, is a member of the class of compounds known as hydroxyindoles. Hydroxyindoles are organic compounds containing an indole moiety that carries a hydroxyl group. N-acetyl serotonin is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). N-acetyl serotonin can be found in a number of food items such as tronchuda cabbage, winter savory, rambutan, and poppy, which makes N-acetyl serotonin a potential biomarker for the consumption of these food products. N-acetyl serotonin can be found primarily in blood and urine, as well as in human kidney and liver tissues. In humans, N-acetyl serotonin is involved in the tryptophan metabolism. Moreover, N-acetyl serotonin is found to be associated with schizophrenia. N-Acetyl-5-hydroxytryptamine is a Melatonin precursor, and that it can potently activate TrkB receptor.
L-Threoneopterin
L-Threoneopterin is a catabolic product of GTP. It is synthesized by macrophages upon stimulation by interferon-gamma. It is used as a marker of HIV infection. It belongs to the chemical group known as pterins. Neopterin is a pteridine derivative present in body fluids; elevated levels result from immune system activation, malignant disease, allograft rejection, and viral infections (From Stedman, 26th ed). Neopterin also serves as a precursor in the biosynthesis of biopterin. Neopterin is a catabolic product of GTP. It is synthesised by macrophages upon stimulation with interferon-gamma. It is used as a marker of HIV infection. It belongs to the chemical group known as pterins.A pteridine derivative present in body fluids; elevated levels result from immune system activation, malignant disease, allograft rejection, and viral infections. (From Stedman, 26th ed) Neopterin also serves as a precursor in the biosynthesis of biopterin. [HMDB] Neopterin (D-(+)-Neopterin), a catabolic product of guanosine triphosphate (GTM), serves as a marker of cellular immune system activation.
Isoxanthopterin
Isoxanthopterin is a pteridine normally present in plasma, urine, and other bodily fluids also vary from normal concentrations in some disease states and also have diagnostic value. Pteridines urinary concentrations seem to vary independently from each other and from normal values to yield a pattern of excreted pteridines that is diagnostic for different species, tissues, and tumor types. Intravenous or intramuscular administration of isoxanthopterin inhibits the growth rates of animal tumor models. ; Pteridin derivatives are a family of organic compound with very similar chemical structures which play an important biochemistry role. Pteridines metabolism and its regulation in normal and pathological conditions have not been extensively investigated due to the difficulty of their quantification. A significant decrease of isoxanthopterin has been determined in cancer patients. (PMID 15837549, 9800651); Xanthine dehydrogenase (XDH) is the enzymes responsible for the conversion of xanthine to uric acid. It requires the presence of the molybdenum cofactor for its proper functioning. XDH is reported to have additional functions, i.e., the conversion of pterin to isoxanthopterin, one of the steps the degradation pathway of 5,6,7,8-tetrahydrobiopterin (BH4). Isoxanthopterin is very low in some cases of hereditary xanthinuria (OMIM 278300) and molybdenum cofactor deficiency (OMIM 252150). (PMID: 8812740). Isoxanthopterin is found in soy bean. Isoxanthopterin is a pteridine normally present in plasma, urine, and other bodily fluids also vary from normal concentrations in some disease states and also have diagnostic value. Pteridines urinary concentrations seem to vary independently from each other and from normal values to yield a pattern of excreted pteridines that is diagnostic for different species, tissues, and tumor types. Intravenous or intramuscular administration of isoxanthopterin inhibits the growth rates of animal tumor models. Pteridin derivatives are a family of organic compound with very similar chemical structures which play an important biochemistry role. Pteridines metabolism and its regulation in normal and pathological conditions have not been extensively investigated due to the difficulty of their quantification. A significant decrease of isoxanthopterin has been determined in cancer patients. (PMID 15837549, 9800651). Xanthine dehydrogenase (XDH) is the enzymes responsible for the conversion of xanthine to uric acid. It requires the presence of the molybdenum cofactor for its proper functioning. XDH is reported to have additional functions, i.e., the conversion of pterin to isoxanthopterin, one of the steps the degradation pathway of 5,6,7,8-tetrahydrobiopterin (BH4). Isoxanthopterin is very low in some cases of hereditary xanthinuria (OMIM 278300) and molybdenum cofactor deficiency (OMIM 252150). (PMID: 8812740). COVID info from PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Sepiapterin
Sepiapterin, also known as 2-amino-6-lactoyl-7,8-dihydropteridin-4(3H)-one, belongs to the class of organic compounds known as pterins and derivatives. These are polycyclic aromatic compounds containing a pterin moiety, which consist of a pteridine ring bearing a ketone and an amine group to form 2-aminopteridin-4(3H)-one. Sepiapterin is also classified as a member of the pteridine class of organic chemicals. It is a yellow fluorescing pigment. Sepiapterin is an intermediate in the salvage pathway of tetrahydrobiopterin (BH(4)). More specifically, sepiapterin can be metabolized into tetrahydrobiopterin via the BH(4) salvage pathway. Tetrahydrobiopterin is an essential cofactor in humans for breakdown of phenylalanine and a catalyst of the metabolism of phenylalanine, tyrosine, and tryptophan to the neurotransmitters dopamine and serotonin. A deficiency of tetrahydrobiopterin can cause toxic buildup of phenylalanine (phenylketonuria) as well as deficiencies of dopamine, norepinephrine, and epinephrine, leading to dystonia and other neurological illnesses. Sepiapterin accumulates in the brain of patients with sepiapterin reductase (SR) deficiency, an inborn error of metabolism. Sepiapterin reductase deficiency is a condition characterized by movement problems, most often a pattern of involuntary, sustained muscle contractions known as dystonia. Other movement problems can include muscle stiffness (spasticity), tremors, problems with coordination and balance (ataxia), and involuntary jerking movements (chorea). People with sepiapterin reductase deficiency can experience episodes called oculogyric crises. These episodes involve abnormal rotation of the eyeballs; extreme irritability and agitation; and pain, muscle spasms, and uncontrolled movements, especially of the head and neck. Movement abnormalities are often worse late in the day. Most affected individuals have delayed development of motor skills such as sitting and crawling, and they typically are not able to walk unassisted. The problems with movement tend to worsen over time. Within humans, sepiapterin participates in a number of enzymatic reactions. In particular, sepiapterin can be converted into 7,8-dihydroneopterin; which is mediated by the enzyme sepiapterin reductase. In addition, sepiapterin can be converted into 7,8-dihydroneopterin through its interaction with the enzyme carbonyl reductase [NADPH] 1. Sepiapterin is an intermediate in the salvage pathway of tetrahydrobiopterin (BH(4)). It is a yellow fluorescing pigment. Sepiapterin accumulates in the brain of patients with sepiapterin reductase (SR) deficiency. [HMDB] C307 - Biological Agent
Xanthurenic acid
Xanthurenic acid, also known as xanthurenate or 8-hydroxykynurenic acid, is a member of the class of compounds known as quinoline carboxylic acids. Quinoline carboxylic acids are quinolines in which the quinoline ring system is substituted by a carboxyl group at one or more positions. Xanthurenic acid is slightly soluble (in water). Xanthurenic acid can be found primarily in blood, feces, and urine, as well as in human epidermis tissue. Within the cell, xanthurenic acid is primarily located in the membrane. Xanthurenic acid exists in all eukaryotes, ranging from yeast to humans. In humans, xanthurenic acid is involved in the tryptophan metabolism. Moreover, xanthurenic acid is found to be associated with citrullinemia type I, which is an inborn error of metabolism. Xanthurenic acid is a metabolite from tryptophan catabolism. It is a substrate of the enzyme methyltransferases (EC 2.1.1.-) in pathway tryptophan metabolism (KEGG). Xanthurenic acid is a metabolite from tryptophan catabolism. It is a substrate of the enzyme methyltransferases [EC 2.1.1.-] in pathway tryptophan metabolism (KEGG). [HMDB] D057847 - Lipid Regulating Agents > D000960 - Hypolipidemic Agents [Raw Data] CBA13_Xanthurenic-aci_neg_40eV_1-5_01_737.txt [Raw Data] CBA13_Xanthurenic-aci_neg_50eV_1-5_01_738.txt [Raw Data] CBA13_Xanthurenic-aci_neg_10eV_1-5_01_734.txt [Raw Data] CBA13_Xanthurenic-aci_neg_30eV_1-5_01_736.txt [Raw Data] CBA13_Xanthurenic-aci_pos_40eV_1-5_01_684.txt [Raw Data] CBA13_Xanthurenic-aci_pos_50eV_1-5_01_685.txt [Raw Data] CBA13_Xanthurenic-aci_pos_30eV_1-5_01_683.txt [Raw Data] CBA13_Xanthurenic-aci_pos_10eV_1-5_01_681.txt [Raw Data] CBA13_Xanthurenic-aci_pos_20eV_1-5_01_682.txt [Raw Data] CBA13_Xanthurenic-aci_neg_20eV_1-5_01_735.txt Xanthurenic acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=59-00-7 (retrieved 2024-07-01) (CAS RN: 59-00-7). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Xanthurenic acid is a putative endogenous Group II metabotropic glutamate receptor agonist, on sensory transmission in the thalamus. Xanthurenic acid is a putative endogenous Group II metabotropic glutamate receptor agonist, on sensory transmission in the thalamus.
4-(Dimethylamino)azobenzene
4-(Dimethylamino)azobenzene is formerly used as a food dye, use discontinued.Methyl yellow, or C.I. 11020, is a chemical compound which may be used as a pH indicator. In aqueous solution at low pH, methyl yellow appears red. Between pH 2.9 and 4.0, methyl yellow undergoes a transition, to become yellow above pH 4.0. As "butter yellow" the agent had been used as a food additive before its toxicity was recognized (Opie EL). (Wikipedia Formerly used as a food dye, use discontinued D009676 - Noxae > D002273 - Carcinogens D004396 - Coloring Agents
Dihydrobiopterin
Dihydrobiopterin, also known as BH2, 7,8-dihydrobiopterin, L-erythro-7,8-dihydrobiopterin, quinonoid dihydrobiopterin or q-BH2, belongs to the class of organic compounds known as biopterins and derivatives. These are coenzymes containing a 2-amino-pteridine-4-one derivative. Dihydrobiopterin is also classified as a pteridine. Pteridines are aromatic compounds composed of fused pyrimidine and pyrazine rings. Dihydrobiopterin is produced during the synthesis of neurotransmitters L-DOPA, dopamine, norepinephrine and epinephrine. It is restored to the required cofactor tetrahydrobiopterin via the NADPH-dependant reduction of dihydrobiopterin reductase. Dihydrobiopterin can also be converted to tetrahydrobiopterin by nitric oxide synthase (NOS) which is catalyzed by the flavoprotein "diaphorase" activity of NOS. This activity is located on the reductase (C-terminal) domain of NOS, whereas the high affinity tetrahydrobiopterin site involved in NOS activation is located on the oxygenase (N-terminal) domain (PMID: 8626754). Sepiapterin reductase (SPR) is another enzyme that plays a role in the production of dihydrobiopterin. SPR catalyzes the reduction of sepiapterin to dihydrobiopterin (BH2), the precursor for tetrahydrobiopterin (BH4). BH4 is a cofactor critical for nitric oxide biosynthesis and alkylglycerol and aromatic amino acid metabolism (PMID: 25550200). Dihydrobiopterin is known to be synthesized in several parts of the body, including the pineal gland. Dihydrobiopterin exists in all eukaryotes, ranging from yeast to humans. In humans, dihydrobiopterin is involved in several metabolic disorders including dihydropteridine reductase (DHPR) deficiency. DHPR deficiency is a severe form of hyperphenylalaninemia (HPA) due to impaired regeneration of tetrahydrobiopterin (BH4) leading to decreased levels of neurotransmitters (dopamine, serotonin) and folate in cerebrospinal fluid, and causing neurological symptoms such as psychomotor delay, hypotonia, seizures, abnormal movements, hypersalivation, and swallowing difficulties. Dihydrobiopterin is also associated with another metabolic disorder known as sepiapterin reductase deficiency (SRD). Sepiapterin reductase catalyzes the (NADP-dependent) reduction of carbonyl derivatives, including pteridines, and plays an important role in tetrahydrobiopterin biosynthesis. Low dihydrofolate reductase activity in the brain leads to the accumulation of dihydrobiopterin, which in turn, inhibits tyrosine and tryptophan hydroxylases. This uncouples neuronal nitric oxide synthase, leading to neurotransmitter deficiencies and neuronal cell death. SRD is characterized by low cerebrospinal fluid neurotransmitter levels and the presence of elevated cerebrospinal fluid dihydrobiopterin. SRD is characterized by motor delay, axial hypotonia, language delay, diurnal fluctuation of symptoms, dystonia, weakness, oculogyric crises, dysarthria, parkinsonian signs and hyperreflexia. Dihydrobiopterin (BH2) is an oxidation product of tetrahydrobiopterin. Tetrahydrobiopterin is a natural occurring cofactor of the aromatic amino acid hydroxylase and is involved in the synthesis of tyrosine and the neurotransmitters dopamine and serotonin. Tetrahydrobiopterin is also essential for nitric oxide synthase catalyzed oxidation of L-arginine to L-citrulline and nitric oxide. [HMDB] 7,8-Dihydro-L-biopterin is an oxidation product of tetrahydrobiopterin.
Sulfathiazole
Sulfathiazole is only found in individuals that have used or taken this drug.It is a short-acting sulfa drug. It used to be a common oral and topical antimicrobial until less toxic alternatives were discovered. It is still occasionally used, sometimes in combination with sulfabenzamide and sulfacetamide. CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2323; ORIGINAL_PRECURSOR_SCAN_NO 2321 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2327; ORIGINAL_PRECURSOR_SCAN_NO 2325 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7417; ORIGINAL_PRECURSOR_SCAN_NO 7415 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2326; ORIGINAL_PRECURSOR_SCAN_NO 2324 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2315; ORIGINAL_PRECURSOR_SCAN_NO 2312 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7355; ORIGINAL_PRECURSOR_SCAN_NO 7354 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7401; ORIGINAL_PRECURSOR_SCAN_NO 7397 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7346; ORIGINAL_PRECURSOR_SCAN_NO 7344 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2323; ORIGINAL_PRECURSOR_SCAN_NO 2320 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 2314; ORIGINAL_PRECURSOR_SCAN_NO 2312 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7406; ORIGINAL_PRECURSOR_SCAN_NO 7404 CONFIDENCE standard compound; INTERNAL_ID 1024; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 7390; ORIGINAL_PRECURSOR_SCAN_NO 7388 D - Dermatologicals > D06 - Antibiotics and chemotherapeutics for dermatological use > D06B - Chemotherapeutics for topical use > D06BA - Sulfonamides J - Antiinfectives for systemic use > J01 - Antibacterials for systemic use > J01E - Sulfonamides and trimethoprim > J01EB - Short-acting sulfonamides C254 - Anti-Infective Agent > C29739 - Sulfonamide Anti-Infective Agent D000890 - Anti-Infective Agents > D013432 - Sulfathiazoles D000890 - Anti-Infective Agents > D013424 - Sulfanilamides CONFIDENCE standard compound; EAWAG_UCHEM_ID 185 CONFIDENCE standard compound; INTERNAL_ID 2360 CONFIDENCE standard compound; INTERNAL_ID 1023 KEIO_ID S079; [MS2] KO009251 KEIO_ID S079
Methylmalonyl-CoA
Methylmalonyl-CoA is an intermediate in the metabolism of Propanoate. It is a substrate for Malonyl-CoA decarboxylase (mitochondrial), Methylmalonyl-CoA mutase (mitochondrial) and Methylmalonyl-CoA epimerase (mitochondrial). [HMDB] Methylmalonyl-CoA is an intermediate in the metabolism of Propanoate. It is a substrate for Malonyl-CoA decarboxylase (mitochondrial), Methylmalonyl-CoA mutase (mitochondrial) and Methylmalonyl-CoA epimerase (mitochondrial).
Methylmalonic acid
Methylmalonic acid is a malonic acid derivative, which is a vital intermediate in the metabolism of fat and protein. In particular, the coenzyme A-linked form of methylmalonic acid, methylmalonyl-CoA, is converted into succinyl-CoA by methylmalonyl-CoA mutase in a reaction that requires vitamin B12 as a cofactor. In this way, methylmalonic acid enters the Krebs cycle and is thus part of one of the anaplerotic reactions. Abnormalities in methylmalonic acid metabolism lead to methylmalonic aciduria. This inborn error of metabolism is attributed to a block in the enzymatic conversion of methylmalonyl CoA to succinyl CoA. Methylmalonic acid is also found to be associated with other inborn errors of metabolism, including cobalamin deficiency, cobalamin malabsorption, malonyl-CoA decarboxylase deficiency, and transcobalamin II deficiency. When present in sufficiently high levels, methylmalonic acid can act as an acidogen and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of methylmalonic acid are associated with at least 5 inborn errors of metabolism, including Malonyl CoA decarboxylase deficiency, Malonic Aciduria, Methylmalonate Semialdehyde Dehydrogenase Deficiency, Methylmalonic Aciduria and Methylmalonic Aciduria Due to Cobalamin-Related Disorders. Methylmalonic acid is an organic acid and abnormally high levels of organic acids in the blood (organic acidemia), urine (organic aciduria), the brain, and other tissues lead to general metabolic acidosis. Acidosis typically occurs when arterial pH falls below 7.35. In infants with acidosis, the initial symptoms include poor feeding, vomiting, loss of appetite, weak muscle tone (hypotonia), and lack of energy (lethargy). These can progress to heart abnormalities, kidney abnormalities, liver damage, seizures, coma, and possibly death. These are also the characteristic symptoms of the untreated IEMs mentioned above. Many affected children with organic acidemias experience intellectual disability or delayed development. In adults, acidosis or acidemia is characterized by headaches, confusion, feeling tired, tremors, sleepiness, and seizures. A malonic acid derivative which is a vital intermediate in the metabolism of fat and protein. Abnormalities in methylmalonic acid metabolism lead to methylmalonic aciduria. This metabolic disease is attributed to a block in the enzymatic conversion of methylmalonyl CoA to succinyl CoA. [HMDB] KEIO_ID M014 Methylmalonic acid (Methylmalonate) is an indicator of Vitamin B-12 deficiency in cancer. Methylmalonic acid (Methylmalonate) is an indicator of Vitamin B-12 deficiency in cancer.
Vanillylmandelic acid (VMA)
Vanillylmandelic acid, also known as vanillylmandelate or VMA, belongs to the class of organic compounds known as methoxyphenols. Methoxyphenols are compounds containing a methoxy group attached to the benzene ring of a phenol moiety. Vanillylmandelic acid is a sweet and vanilla tasting compound. Vanillylmandelic acid (VMA) is a chemical intermediate in the synthesis of artificial vanilla flavorings and is an end-stage metabolite of the catecholamines (dopamine, epinephrine, and norepinephrine). Vanillylmandelic acid exists in all living organisms, ranging from bacteria to plants to humans. Within humans, vanillylmandelic acid participates in a number of enzymatic reactions. In particular, vanillylmandelic acid can be biosynthesized from 3-methoxy-4-hydroxyphenylglycolaldehyde through its interaction with the enzyme aldehyde dehydrogenase. In addition, vanillylmandelic acid and pyrocatechol can be biosynthesized from 3,4-dihydroxymandelic acid and guaiacol through the action of the enzyme catechol O-methyltransferase. Urinary VMA is elevated in patients with tumors that secrete catecholamines. Urinary VMA tests may also be used to diagnose neuroblastomas, and to monitor treatment of these conditions. VMA urinalysis tests can be used to diagnose an adrenal gland tumor called pheochromocytoma, a tumor of catecholamine-secreting chromaffin cells. Vanillylmandelic acid (VMA) is produced in the liver and is a major product of norepinephrine and epinephrine metabolism excreted in the urine. Vanillylmandelic acid is one of the products of the catabolism of catecholamines (epinephrine, norepinephrine and dopamine). High levels of vanillylmandelic acid can indicate an adrenal gland tumor (pheochromocytoma) or another type of tumor that produces catecholamines. (WebMD) [HMDB] D000890 - Anti-Infective Agents > D000892 - Anti-Infective Agents, Urinary > D008333 - Mandelic Acids Acquisition and generation of the data is financially supported in part by CREST/JST. KEIO_ID H056 Vanillylmandelic acid is the endproduct of epinephrine and norepinephrine metabolism. Vanillylmandelic acid can be used as an indication of the disorder in neurotransmitter metabolism as well. Vanillylmandelic acid has antioxidant activity towards DPPH radical with an IC50 value of 33 μM[1].
9,10-Phenanthrenequinone
CONFIDENCE standard compound; INTERNAL_ID 19 D009676 - Noxae > D009153 - Mutagens
Pterin
Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; Pterin is a heterocyclic compound composed of a pyrazine ring and a pyrimidine ring (a pteridine ring system); the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. As a group, pterins are compounds that are derivatives of 2-amino-4-oxopteridine, with additional functional groups attached to the pyrazine ring.; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia. Pterin is found in soy bean. Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia.
1-Phenyl-1,2-propanedione
1-Phenyl-1,2-propanedione is found in coffee and coffee products. 1-Phenyl-1,2-propanedione is present in coffee aroma. 1-Phenyl-1,2-propanedione is a flavouring ingredient. Present in coffee aroma. Flavouring ingredient. 1-Phenyl-1,2-propanedione is found in coffee and coffee products. 1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2]. 1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2].
7,8-Dihydropteroic acid
In the mammalian host, dihydrofolate biosynthesis occurs via the reduction of folic acid, whereas in plasmodia (e.g. Plasmodium berghei, a malaria parasite) the biosynthesis of 7,8-dihydropteroate, an intermediate product in dihydrofolate synthesis, occurs via the enzymic catalysis of the reaction of 2-amino-4-hydroxy-6-hydroxymethyl-7,8-dihydropteridine pyrophosphate with p-aminobenzoate. Malaria parasites synthesize their folate cofactors de novo and the antimalarial action of sulfonamides is due to their inhibiting the plasmodial dihydropteroate synthesis. The enzymes 6-hydroxymethylpterin pyrophosphokinase (EC 2.7.6.3, HPPK) and dihydropteroate synthase (EC 2.5.1.15, DHPS) catalyze sequential steps in folate biosynthesis. They are present in microorganisms but absent in mammals and therefore are especially suitable targets for antimicrobials. Sulfa drugs (sulfonamides and sulfones) currently are used as antimicrobials targeting DHPS, although resistance to these drugs is increasing. An NADPH-coupled microplate photometric assay could be used for rapid screening of chemical libraries for novel inhibitors of folate biosynthesis as the first step in developing new antimicrobial drugs targeting the folate biosynthetic pathway; in the microplate, the product of the DHPS reaction, 7,8-dihydropteroic acid, is reduced to tetrahydropteroate by excess dihydrofolate reductase (DHFR) using the cofactor NADPH (PMID: 17134675, 4354403, 3546688). 7,8-dihydropteroic acid, also known as dihydropteroinsaeure or h2pte, belongs to pterins and derivatives class of compounds. Those are polycyclic aromatic compounds containing a pterin moiety, which consist of a pteridine ring bearing a ketone and an amine group to form 2-aminopteridin-4(3H)-one. 7,8-dihydropteroic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). 7,8-dihydropteroic acid can be synthesized from pteroic acid. 7,8-dihydropteroic acid can also be synthesized into 2-hydroxy-7,8-dihydropteroic acid. 7,8-dihydropteroic acid can be found in a number of food items such as rice, towel gourd, cauliflower, and silver linden, which makes 7,8-dihydropteroic acid a potential biomarker for the consumption of these food products. 7,8-dihydropteroic acid exists in all living species, ranging from bacteria to humans. In humans, 7,8-dihydropteroic acid is involved in the pterine biosynthesis.
6-hydroxymethyl-7,8-dihydropterin
2-amino-6-(hydroxymethyl)-7,8-dihydropteridin-4-ol, also known as hmdp cpd, belongs to pterins and derivatives class of compounds. Those are polycyclic aromatic compounds containing a pterin moiety, which consist of a pteridine ring bearing a ketone and an amine group to form 2-aminopteridin-4(3H)-one. 2-amino-6-(hydroxymethyl)-7,8-dihydropteridin-4-ol is slightly soluble (in water) and a very weakly acidic compound (based on its pKa). 2-amino-6-(hydroxymethyl)-7,8-dihydropteridin-4-ol can be found in a number of food items such as cardoon, sunburst squash (pattypan squash), climbing bean, and fenugreek, which makes 2-amino-6-(hydroxymethyl)-7,8-dihydropteridin-4-ol a potential biomarker for the consumption of these food products. 2-amino-6-(hydroxymethyl)-7,8-dihydropteridin-4-ol exists in E.coli (prokaryote) and yeast (eukaryote).
Dyspropterin
Dyspropterin, an intermediate formed from dihydroneopterin triphosphate in the biosynthetic pathway of tetrahydrobiopterin. [HMDB] Dyspropterin, an intermediate formed from dihydroneopterin triphosphate in the biosynthetic pathway of tetrahydrobiopterin.
6-Lactoyltetrahydropterin
6-Lactoyltetrahydropterin is a putative intermediate in the de novo synthesis of tetrahydrobiopterin (BH4) pathway, in a reaction involving the enzyme sepiapterin reductase (E.C. 1.1.1.153) in human liver. In brain, an enzyme distinct from sepiapterin reductase catalyzes the TPNH-dependent reduction of 6-pyruvoyl-tetrahydropterin to 6-lactoyl-tetrahydropterin. (PMID: 4004850). In brain, the expression of other enzymes involved in BH4 biosynthesis includes aldose reductase, carbonyl reductase, GTP-cyclohydrolase I, and 6-pyruvoyltetrahydrobiopterin. Sepiapterin reductase expression is increased in Parkinsons disease brain tissue. (PMID: 17270157). 6-Lactoyltetrahydropterin is a putative intermediate in the de novo synthesis of tetrahydrobiopterin (BH4) pathway, in a reaction involving the enzyme sepiapterin reductase (E.C. 1.1.1.153) in human liver. In brain, an enzyme distinct from sepiapterin reductase catalyzes the TPNH-dependent reduction of 6-pyruvoyl-tetrahydropterin to 6-lactoyl-tetrahydropterin. (PMID: 4004850)
Dihydroneopterin triphosphate
The biosynthesis of tetrahydrobiopterin (BH4) from dihydroneopterin triphosphate (NH2P3) was studied in human liver extract. The phosphate-eliminating enzyme (PEE) was purified approximately 750-fold. The conversion of NH2P3 to BH4 was catalyzed by this enzyme in the presence of partially purified sepiapterin reductase, Mg2+, and NADPH. The PEE is heat stable when heated at 80°C for 5 min. It has a molecular weight of 63 000 daltons. One possible intermediate 6-(1-hydroxy-2-oxopropyl)5,6,7,8-tetrahydropterin(2-oxo-tetrahydropte rin) was formed upon incubation of BH4 in the presence of sepiapterin reductase and NADP+ at pH 9.0. The reduction of this compound with NaBD4 yielded monodeutero-, threo-, and erythro-BH4; the deuterium was incorporated at the 2 position. This and the UV spectra were consistent with a 2-oxo-tetrahydropterin structure. Dihydrofolate reductase (DHFR) catalyzed the reduction of BH2 into BH4 and was found to be specific for the pro-R-NADPH side. The sepiapterin reductase catalyzed the transfer of the pro-S hydrogen of NADPH during the reduction of sepiapterin into BH2. In the presence of crude liver extracts, the conversion of NH2P3 into BH4 requires NADPH. Two deuterium atoms were incorporated from (4S-2H)NADHP in the 1 and 2 position of the BH4 side chain. The incorporation of one hydrogen from the solvent was found at position C(6). These results are consistent with the occurrence of an intramolecular redox exchange between the pteridine nucleus and the side chain and formation of 6-pyruvoyl-5,6,7,8-tetrahydropterin(tetrahydro-1-2-dioxopterin) as an intermediate (PMID: 3930838). COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Dihydropteridine
Dihydropteridine is a generic compound; the product of the reduction of 5,6,7,8-Tetrahydropteridine, which is catalyzed by 6,7-dihydropteridine reductase (EC 1.5.1.34). (KEGG) This compound is recognised as a cause of tetrahydrobiopterin (BH(4)) deficiency, leading to hyperphenylalaninemia (HPA) and impaired biogenic amine deficiency. (PMID: 14705166). A generic compound; the product of the reduction of 5,6,7,8-Tetrahydropteridine, which is catalyzed by 6,7-dihydropteridine reductase (EC 1.5.1.34). (KEGG) This compound is recognised as a cause of tetrahydrobiopterin (BH(4)) deficiency, leading to hyperphenylalaninemia (HPA) and impaired biogenic amine deficiency. (PMID: 14705166) [HMDB]
Tetrahydropteridine
Tetrahydrobiopterin serves well-characterized cofactor functions for hydroxylating aromatic amino acids and ether lipids and for formation of nitric oxide (NO) from L-arginine. Formation of NO involves two cycles of oxidation of Tetrahydrobiopterin to its radical with subsequent rehydroxylation into Tetrahydrobiopterin, one for reduction of the heme-bound arginine-Fe(II)O2 complex of NO synthase (NOS), the other for reduction of the N-hydroxy-L-arginine-Fe(II)O2 complex. Tetrahydrobiopterin-dependent glyceryl ether monooxygenase (EC 1.14.16.5) is found not only in liver and the gastrointestinal tract but also in brain and other organs (this enzyme plays an essential role in conjugation with the cleavage enzyme in the regulation of cellular levels of -alkyl moieties in glycerolipids). Tetrahydrobiopterin is essential for the enzymatic reaction of tyrosine 3-monooxygenase (EC 1.14.16.2) for the first step in the biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine. Limited Tetrahydrobiopterin availability not only decreases formation of NO but also causes NOS-derived superoxide/hydrogen peroxide production leading to formation of peroxynitrite as well as S-nitrosoglutathione. As a consequence of its oxygen-activating potential, Tetrahydrobiopterin is also subject to autoxidation in a free radical chain reaction in leading to formation of superoxide and finally to hydrogen peroxide. On the other hand, Tetrahydrobiopterin, like other H4-pterins, can scavenge reactive oxygen species and peroxynitrite. Thus, Tetrahydrobiopterin may have opposing effects in various biological systems depending on whether its cofactor roles outweigh its chemical reactivity or vice versa. Sepiapterin reductase (EC 1.1.1.153) catalyzes the reduction of tetrahydro-sepiapterin to tetrahydrobiopterin -the terminal step in this biosynthetic pathway for tetrahydrobiopterin. This reaction is N-acetyl-serotonin-sensitive and can completely inhibit tetrahydrobiopterin synthesis. (PMID: 3881214, 17303893, 3756924, 15223071) [HMDB] Tetrahydrobiopterin serves well-characterized cofactor functions for hydroxylating aromatic amino acids and ether lipids and for formation of nitric oxide (NO) from L-arginine. Formation of NO involves two cycles of oxidation of Tetrahydrobiopterin to its radical with subsequent rehydroxylation into Tetrahydrobiopterin, one for reduction of the heme-bound arginine-Fe(II)O2 complex of NO synthase (NOS), the other for reduction of the N-hydroxy-L-arginine-Fe(II)O2 complex. Tetrahydrobiopterin-dependent glyceryl ether monooxygenase (EC 1.14.16.5) is found not only in liver and the gastrointestinal tract but also in brain and other organs (this enzyme plays an essential role in conjugation with the cleavage enzyme in the regulation of cellular levels of -alkyl moieties in glycerolipids). Tetrahydrobiopterin is essential for the enzymatic reaction of tyrosine 3-monooxygenase (EC 1.14.16.2) for the first step in the biosynthesis of catecholamines such as norepinephrine, epinephrine and dopamine. Limited Tetrahydrobiopterin availability not only decreases formation of NO but also causes NOS-derived superoxide/hydrogen peroxide production leading to formation of peroxynitrite as well as S-nitrosoglutathione. As a consequence of its oxygen-activating potential, Tetrahydrobiopterin is also subject to autoxidation in a free radical chain reaction in leading to formation of superoxide and finally to hydrogen peroxide. On the other hand, Tetrahydrobiopterin, like other H4-pterins, can scavenge reactive oxygen species and peroxynitrite. Thus, Tetrahydrobiopterin may have opposing effects in various biological systems depending on whether its cofactor roles outweigh its chemical reactivity or vice versa. Sepiapterin reductase (EC 1.1.1.153) catalyzes the reduction of tetrahydro-sepiapterin to tetrahydrobiopterin -the terminal step in this biosynthetic pathway for tetrahydrobiopterin. This reaction is N-acetyl-serotonin-sensitive and can completely inhibit tetrahydrobiopterin synthesis. (PMID: 3881214, 17303893, 3756924, 15223071).
Tetrabenazine
A drug formerly used as an antipsychotic but now used primarily in the treatment of various movement disorders including tardive dyskinesia. Tetrabenazine blocks uptake into adrenergic storage vesicles and has been used as a high affinity label for the vesicle transport system. [PubChem] D018377 - Neurotransmitter Agents > D014179 - Neurotransmitter Uptake Inhibitors > D018759 - Adrenergic Uptake Inhibitors D018377 - Neurotransmitter Agents > D018663 - Adrenergic Agents D049990 - Membrane Transport Modulators N - Nervous system Same as: D08575
Isopropylbenzene
Isopropylbenzene, also known as 2-phenylpropane or benzene, isopropyl, belongs to the class of organic compounds known as cumenes. These are aromatic compounds containing a prop-2-ylbenzene moiety. Isopropylbenzene is found, on average, in the highest concentration within ceylon cinnamons and gingers. Isopropylbenzene has also been detected, but not quantified, in several different foods, such as celery stalks, cumins , herbs and spices, and sweet cherries. Isopropylbenzene is formally rated as a possible carcinogen (by IARC 2B) and is also a potentially toxic compound. Isopropylbenzene is a component of petroleum destillates. Petroleum distillate poisoning may cause nausea, vomiting, cough, pulmonary irritation progressing to pulmonary edema, bloody sputum, and bronchial pneumonia. Petroleum distillates are also irritating to the skin. Petroleum distillates are aspiration hazards and may cause pulmonary damage, central nervous system depression, and cardiac effects such as cardiac arrhythmias. They may also affect the blood, immune system, liver, and kidney. At high amounts, central nervous system depression may also occur, with symptoms such as weakness, dizziness, slow and shallow respiration, unconsciousness, and convulsions. Gastric lavage, emesis, and the administration of activated charcoal should be avoided, as vomiting increases the risk of aspiration. Treatment is mainly symptomatic and supportive. Volatile hydrocarbons are absorbed mainly through the lungs, and may also enter the body after ingestion via aspiration. Trace constituent of ginger oil (Zingiber officinale)
CoA 4:1;O2
The (R)-enantiomer of methylmalonyl-CoA.
Homovanillic acid (HVA)
Homovanillic acid (HVA), also known as homovanillate, belongs to the class of organic compounds known as methoxyphenols. Methoxyphenols are compounds containing a methoxy group attached to the benzene ring of a phenol moiety. HVA is also classified as a catechol. HVA is a major catecholamine metabolite that is produced by a consecutive action of monoamine oxidase and catechol-O-methyltransferase on dopamine. HVA is typically elevated in patients with catecholamine-secreting tumors (such as neuroblastoma, pheochromocytoma, and other neural crest tumors). HVA levels are also used in monitoring patients who have been treated for these kinds tumors. HVA levels may also be altered in disorders of catecholamine metabolism such as monoamine oxidase-A (MOA) deficiency. MOA deficiency can cause decreased urinary HVA values, while a deficiency of dopamine beta-hydrolase (the enzyme that converts dopamine to norepinephrine) can cause elevated urinary HVA values. Within humans, HVA participates in a number of enzymatic reactions. In particular, HVA and pyrocatechol can be biosynthesized from 3,4-dihydroxybenzeneacetic acid and guaiacol. This reaction is catalyzed by the enzyme known as catechol O-methyltransferase. In addition, HVA can be biosynthesized from homovanillin through the action of the enzyme known aldehyde dehydrogenase. HVA has recently been found in a number of beers and appears to arise from the fermentation process (https://doi.org/10.1006/fstl.1999.0593). HVA is also a metabolite of Bifidobacterium (PMID: 24958563) and the bacterial breakdown of dietary flavonoids. Dietary flavonols commonly found in tomatoes, onions, and tea, can lead to significantly elevated levels of urinary HVA (PMID: 20933512). Likewise, the microbial digestion of hydroxytyrosol (found in olive oil) can also lead to elevated levels of HVA in humans (PMID: 11929304). Homovanillic acid is a monocarboxylic acid that is the 3-O-methyl ether of (3,4-dihydroxyphenyl)acetic acid. It is a catecholamine metabolite. It has a role as a human metabolite and a mouse metabolite. It is a member of guaiacols and a monocarboxylic acid. It is functionally related to a (3,4-dihydroxyphenyl)acetic acid. It is a conjugate acid of a homovanillate. Homovanillic acid is a natural product found in Aloe africana, Ginkgo biloba, and other organisms with data available. Homovanillic Acid is a monocarboxylic acid that is a catecholamine metabolite. Homovanillic acid may be used a marker for metabolic stress, tobacco usage or the presence of a catecholamine secreting tumor, such as neuroblastoma or pheochromocytoma. Homovanillic acid is a metabolite found in or produced by Saccharomyces cerevisiae. A 3-O-methyl ETHER of (3,4-dihydroxyphenyl)acetic acid. See also: Ipomoea aquatica leaf (part of). Homovanillic acid is a major catecholamine metabolite. 3-Methoxy-4-hydroxyphenylacetic acid is found in beer, olive, and avocado. A monocarboxylic acid that is the 3-O-methyl ether of (3,4-dihydroxyphenyl)acetic acid. It is a catecholamine metabolite. Homovanillic acid is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency. Homovanillic acid is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency.
Biopterin
Biopterin concentrations in cerebrospinal fluid from patients with Parkinsons disease, in which the nigrostriatal dopamine neurons degenerate, are lower than those from age-matched older controls. In hereditary progressive dystonia/DOPA-responsive dystonia, which is a dopamine deficiency caused by mutations in GTP cyclohydrolase I without neuronal cell death (Segawas disease), biopterin in cerebrospinal fluid decrease in parallel owing to the decreased activity in GTP cyclohydrolase I (EC 3.5.4.16, is an enzyme that is part of the folate and biopterin biosynthesis pathways. It is responsible for the hydrolysis of guanosine triphosphate (GTP) to form 7,8-dihydroneopterin 3-triphosphate. (Pteridines (1999), 10(1), 5-13.) Lowered levels of urinary biopterin concomitant with elevated serum phenylalanine concentration occur in a variant type of hyperphenylalaninemia caused by a deficiency of tetrahydrobiopterin (BH4), the obligatory cofactor for phenylalanine hydroxylase. The most frequent form of this cofactor deficiency is due to lack of 6-pyruvoyl-tetrahydropterin synthase (PTPS) activity, the second enzyme in the biosynthetic pathway for BH4. (PMID 8178819) The hepatic phenylalanine hydroxylating system consists of 3 essential components, phenylalanine hydroxylase, dihydropteridine reductase, and the nonprotein coenzyme, tetrahydrobiopterin. The reductase and the pterin coenzyme are also essential components of the tyrosine and tryptophan hydroxylating systems. There are 3 distinct forms of phenylketonuria or hyperphenylalaninemia, each caused by lack of 1 of these essential components. The variant forms of the disease that are caused by the lack of dihydropteridine reductase or tetrahydrobiopterin are characterized by severe neurol. deterioration, impaired functioning of tyrosine and tryptophan hydroxylases, and the resultant deficiency of tyrosine- and tryptophan-derived monoamine neurotransmitters in brain. (PMID 3930837) [HMDB] Biopterin, also known as tetrahydrobiopterin or BH4, belongs to the class of organic compounds known as biopterins and derivatives. These are coenzymes containing a 2-amino-pteridine-4-one derivative. Biopterin or tetrahydrobiopterin is also classified as a pterin derivative that consists of pterin group bearing an amino, an oxo and a 1,2-dihydroxypropyl substituent at positions 2, 4 and 6, respectively. Biopterin compounds found within the animals include BH4 (tetrahydrobiopterin), the free radical BH3, and BH2 (also a free radical, called Dihydrobiopterin). BH2 is produced in the synthesis of L-DOPA, dopamine, norepinephrine and epinephrine. It is restored to the required cofactor tetrahydrobiopterin by the enzyme dihydrobiopterin reductase. Tetrahydrobiopterin (BH4) is a cofactor of the three aromatic amino acid hydroxylase enzymes, used in the degradation of amino acid phenylalanine and in the biosynthesis of the neurotransmitters serotonin (5-hydroxytryptamine, 5-HT), melatonin, dopamine, norepinephrine (noradrenaline), epinephrine (adrenaline). It is also a cofactor for the production of nitric oxide (NO) by the nitric oxide syntheses. Tetrahydrobiopterin is biosynthesized from guanosine triphosphate (GTP) by three chemical reactions mediated by the enzymes GTP cyclohydrolase I (GTPCH), 6-pyruvoyltetrahydropterin synthase (PTPS), and sepiapterin reductase (SR). Biopterin synthesis disorders are a cause of hyperphenylalaninemia. There are 3 distinct forms of phenylketonuria or hyperphenylalaninemia, each caused by lack of aromatic amino acid hydroxylase enzymes. The variant forms of hyperphenylalaninemia that are caused by the lack of dihydropteridine reductase or tetrahydrobiopterin are characterized by severe neurological deterioration, impaired functioning of tyrosine and tryptophan hydroxylases, and the resultant deficiency of tyrosine- and tryptophan-derived monoamine neurotransmitters in brain. (PMID 3930837). 6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
7,8-Dihydroneopterin
7,8-Dihydroneopterin, also known as dihydroneopterin, belongs to the class of organic compounds known as biopterins and derivatives. These are coenzymes containing a 2-amino-pteridine-4-one derivative. They are synthesized in several parts of the body, including the pineal gland. 7,8-Dihydroneopterin is a strong basic compound (based on its pKa). Within humans, 7,8-dihydroneopterin participates in a number of enzymatic reactions. In particular, 7,8-dihydroneopterin can be biosynthesized from sepiapterin; which is catalyzed by the enzyme sepiapterin reductase or carbonyl reductase [NADPH] 1. In humans, 7,8-dihydroneopterin is involved in the metabolic disorder called hyperphenylalaninemia due to 6-pyruvoyltetrahydropterin synthase (PTPS) deficiency. 7,8-Dihydroneopterin is produced by human monocyte-derived macrophages upon stimulation with interferon-gamma. Increased amounts of 7,8-dihydroneopterin in human body fluids are found in many disorders, including viral infections and autoimmune diseases (PMID: 12804528). 7,8-dihydroneopterin, also known as npr, belongs to biopterins and derivatives class of compounds. Those are coenzymes containing a 2-amino-pteridine-4-one derivative. They are mainly synthesized in several parts of the body, including the pineal gland. 7,8-dihydroneopterin is slightly soluble (in water) and a very weakly acidic compound (based on its pKa). 7,8-dihydroneopterin can be found in a number of food items such as prickly pear, star anise, cocoa bean, and black salsify, which makes 7,8-dihydroneopterin a potential biomarker for the consumption of these food products. 7,8-dihydroneopterin exists in all living organisms, ranging from bacteria to humans. In humans, 7,8-dihydroneopterin is involved in the pterine biosynthesis. 7,8-dihydroneopterin is also involved in several metabolic disorders, some of which include hyperphenylalaninemia due to dhpr-deficiency, sepiapterin reductase deficiency, dopa-responsive dystonia, and hyperphenylalaniemia due to guanosine triphosphate cyclohydrolase deficiency. 7,8-Dihydroneopterin, an inflammation marker, induces cellular apoptosis in astrocytes and neurons via enhancement of nitric oxide synthase (iNOS) expression. 7,8-Dihydroneopterin can be used in the research of neurodegenerative diseases[1].
S-Methylmalonyl-CoA
Methylmalonyl-CoA is an intermediate in the metabolism of Propanoate. It is a substrate for Malonyl-CoA decarboxylase (mitochondrial), Methylmalonyl-CoA mutase (mitochondrial) and Methylmalonyl-CoA epimerase (mitochondrial). [HMDB] Methylmalonyl-CoA is an intermediate in the metabolism of Propanoate. It is a substrate for Malonyl-CoA decarboxylase (mitochondrial), Methylmalonyl-CoA mutase (mitochondrial) and Methylmalonyl-CoA epimerase (mitochondrial).
Methylmalonic acid
A dicarboxylic acid that is malonic acid in which one of the methylene hydrogens is substituted by a methyl group. Methylmalonic acid (Methylmalonate) is an indicator of Vitamin B-12 deficiency in cancer. Methylmalonic acid (Methylmalonate) is an indicator of Vitamin B-12 deficiency in cancer.
Oxitriptan
D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D000928 - Antidepressive Agents relative retention time with respect to 9-anthracene Carboxylic Acid is 0.053 N - Nervous system > N06 - Psychoanaleptics > N06A - Antidepressants relative retention time with respect to 9-anthracene Carboxylic Acid is 0.054 L-5-Hydroxytryptophan (L-5-HTP), a naturally occurring amino acid and a dietary supplement for use as an antidepressant, appetite suppressant, and sleep aid, is the immediate precursor of the neurotransmitter serotonin and a reserpine antagonist[1]. L-5-Hydroxytryptophan (L-5-HTP) is used to treat fibromyalgia, myoclonus, migraine, and cerebellar ataxia[2][3][4][5].
sulfathiazole
D - Dermatologicals > D06 - Antibiotics and chemotherapeutics for dermatological use > D06B - Chemotherapeutics for topical use > D06BA - Sulfonamides J - Antiinfectives for systemic use > J01 - Antibacterials for systemic use > J01E - Sulfonamides and trimethoprim > J01EB - Short-acting sulfonamides C254 - Anti-Infective Agent > C29739 - Sulfonamide Anti-Infective Agent D000890 - Anti-Infective Agents > D013432 - Sulfathiazoles D000890 - Anti-Infective Agents > D013424 - Sulfanilamides
Xanthurenic acid
A quinolinemonocarboxylic acid that is quinoline-2-carboxylic acid substituted by hydroxy groups at C-4 and C-8. D057847 - Lipid Regulating Agents > D000960 - Hypolipidemic Agents D009676 - Noxae > D000963 - Antimetabolites Xanthurenic acid is a putative endogenous Group II metabotropic glutamate receptor agonist, on sensory transmission in the thalamus. Xanthurenic acid is a putative endogenous Group II metabotropic glutamate receptor agonist, on sensory transmission in the thalamus.
N-Acetylserotonin
An N-acylserotonin resulting from the formal condensation of the primary amino group of serotonin with the carboxy group of acetic acid. N-Acetyl-5-hydroxytryptamine is a Melatonin precursor, and that it can potently activate TrkB receptor.
biopterin
A pterin derivative that consists of pterin bearing amino, oxo and 1,2-dihydroxypropyl substituents at positions 2, 4 and 6 respectively. The parent of the class of biopterins; the L-erythro isomer occurs widely in nature. 6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
Cimifugin
Cimifugin (Cimitin) is a bioactive component of Cimicifuga racemosa, a Chinese herb. Cimifugin suppresses allergic inflammation by reducing epithelial derived initiative key factors via regulating tight junctions[1]. Cimifugin reduces the migration and chemotaxis of RAW264.7 cells and inhibits the release of inflammatory factors and activation of MAPKs and NF-κB signaling pathways induced by LPS[2]. Cimifugin (Cimitin) is a bioactive component of Cimicifuga racemosa, a Chinese herb. Cimifugin suppresses allergic inflammation by reducing epithelial derived initiative key factors via regulating tight junctions[1]. Cimifugin reduces the migration and chemotaxis of RAW264.7 cells and inhibits the release of inflammatory factors and activation of MAPKs and NF-κB signaling pathways induced by LPS[2].
dihydrobiopterin
7,8-Dihydro-L-biopterin is an oxidation product of tetrahydrobiopterin.
Isoxanthopterin
COVID info from PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Dihydroneopterin triphosphate
COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
TETRABENAZINE
D018377 - Neurotransmitter Agents > D014179 - Neurotransmitter Uptake Inhibitors > D018759 - Adrenergic Uptake Inhibitors D018377 - Neurotransmitter Agents > D018663 - Adrenergic Agents D049990 - Membrane Transport Modulators N - Nervous system Same as: D08575
AI3-23868
1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2]. 1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2].
Sapropterin
A - Alimentary tract and metabolism > A16 - Other alimentary tract and metabolism products > A16A - Other alimentary tract and metabolism products > A16AX - Various alimentary tract and metabolism products A tetrahydropterin that is 2-amino-5,6,7,8-tetrahydropteridin-4(3H)-one in which a hydrogen at position 6 is substituted by a 1,2-dihydroxypropyl group (6R,1R,2S-enantiomer). C26170 - Protective Agent > C275 - Antioxidant Sapropterin is converted from 7,8-dihydroneopterin triphosphate by 6-pyruvoyl tetrahydropterin synthase and sepiapterin reductase. It is essential in the formation of neurotransmitters and for nitric oxide synthase (PMID 16946131). [HMDB] Tetrahydrobiopterin ((Rac)-Sapropterin) is a cofactor of the aromatic amino acid hydroxylases enzymes and also acts as an essential cofactor for all nitric oxide synthase (NOS) isoforms.
Methyl Yellow
D009676 - Noxae > D002273 - Carcinogens D004396 - Coloring Agents
1-Phenylpropane-1,2-dione
An alpha-diketone that consists of 1-phenylpropane bearing keto substituents at positions 1 and 2. It is found in coffee. 1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2]. 1-Phenylpropane-1,2-dione, isolated from young Ephedra sinica Stapf (Ephedraceae), is biosynthetic precursors of the ephedrine alkaloids[1][2].
7,8-Dihydroneopterin
A neopterin where positions C-7 and C-8 have been hydrogenated. 7,8-Dihydroneopterin, an inflammation marker, induces cellular apoptosis in astrocytes and neurons via enhancement of nitric oxide synthase (iNOS) expression. 7,8-Dihydroneopterin can be used in the research of neurodegenerative diseases[1].
dihydropteroate
A pteroic acid derivative arising from formal hydrogenation of the 7,8-double bond of pteroic acid.
Dyspropterin
A tetrahydropterin that is 2-amino-5,6,7,8-tetrahydropteridin-4(3H)-one substituted by a 2-oxopropanoyl group at position 6.
