Exact Mass: 237.0857
Exact Mass Matches: 237.0857
Found 69 metabolites which its exact mass value is equals to given mass value 237.0857,
within given mass tolerance error 0.001 dalton. Try search metabolite list with more accurate mass tolerance error
0.0002 dalton.
d-Threo biopterin
6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
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
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.
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.
Primapterin
Primapterin and anapterin are present in very low concentrations in every human urine, as well as in the liver of man. - PMID: 3382399 [HMDB] Primapterin and anapterin are present in very low concentrations in every human urine, as well as in the liver of man. - PMID: 3382399.
Deoxyeritadenine
Deoxyeritadenine is found in mushrooms. Deoxyeritadenine is a constituent of the edible shitake mushroom
D-Biopterin
D-Biopterin is a pterin which is a chemical compound composed of a pyrazine ring and a pyrimidine ring. The level of biopterin decreases in the urine of patients with guanosine triphosphate cyclohydrolase I. (PMID 10770663) [HMDB] D-Biopterin is a pterin which is a chemical compound composed of a pyrazine ring and a pyrimidine ring. The level of biopterin decreases in the urine of patients with guanosine triphosphate cyclohydrolase I. (PMID 10770663). 6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.
Orinapterin
Orinapterin is a threo diastereomer of biopterin, was first isolated from human urine. Its structure was shown to be 2-amino-4(3H)-oxo-6-[(1S,2S)-1,2-dihydroxypropyl]pteridine. A non-enzymatic transformation of 7,8-dihydroneopterin and 7,8-dihydrobiopterin by a mechanism analogous to keto-enol tautomerism is postulated for the formation of umanopterin and orinapterin in human body. [HMDB] Orinapterin is a threo diastereomer of biopterin, was first isolated from human urine. Its structure was shown to be 2-amino-4(3H)-oxo-6-[(1S,2S)-1,2-dihydroxypropyl]pteridine. A non-enzymatic transformation of 7,8-dihydroneopterin and 7,8-dihydrobiopterin by a mechanism analogous to keto-enol tautomerism is postulated for the formation of umanopterin and orinapterin in human body.
8-[(Aminomethyl)sulfanyl]-6-sulfanyloctanoic acid
8-[(aminomethyl)sulfanyl]-6-sulfanyloctanoic acid is a intermediate of the glycine cleavage system. It can be found covalently attached to the H-protein of the glycine cleavage system. [HMDB] 8-[(aminomethyl)sulfanyl]-6-sulfanyloctanoic acid is a intermediate of the glycine cleavage system. It can be found covalently attached to the H-protein of the glycine cleavage system.
N-(1-Deoxy-1-fructosyl)glycine
Fructose aminoacids are naturally occurring compounds derived from D-fructose and L-aminoacids. They are amadori products resulting from sugar-aminoacid interactions in food products, especially cooked foods [CCD] N-(1-Deoxy-1-fructosyl)glycine is classified as a Natural Food Constituent (code WA) in the DFC.
Fructoseglycine
Fructoseglycine, a fructose molecule containing a glycine group in place of a hydroxyl group.
2-Amino-6-(2-hydroxypropanoyl)-2,3-dihydro-1H-pteridin-4-one
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.
Orinapterin
A biopterin that consists of pterin bearing amino, oxo and 1,2-dihydroxypropyl substituents at positions 2, 4 and 6.
Primapterin
A member of the class of biopterins that consists of pterin bearing amino, oxo and 1,2-dihydroxypropyl substituents at positions 2, 4 and 7 respectively.
6-Pyruvoyl tetrahydropteridine
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2-[[(3S,4R,5R)-3,4,5,6-tetrahydroxy-2-oxohexyl]azaniumyl]acetate
8-amino-3,8-dideoxy-alpha-D-manno-oct-2-ulosonic acid
12-Imino-7-methyl-3,5,9,11-tetrazatricyclo[6.4.0.02,7]dodecane-4,6,10-trione
5-Amino-5-methyl-6-{2-oxo-1,3-diazabicyclo[2.2.0]hex-4-en-6-yl}-1,3-diazinane-2,4-dione
A member of the class of azabicycloalkanes that is 1,3-diazabicyclo[2.2.0]hex-4-en-2-one substituted at position 6 by a 5-amino-5-methyl-2,4-dioxodihydropyrimidin-6-yl group.
6-amino-5-hydroxy-5-methyl-3,4-dihydro[4,4-bipyrimidine]-2,2(1H,5H)-dione
5-amino-4a-methyl-1,4a,4b,8,8a,8b-hexahydrocyclobuta[1,2-d:4,3-d]dipyrimidine-2,4,7(3H)-trione
Dyspropterin
A tetrahydropterin that is 2-amino-5,6,7,8-tetrahydropteridin-4(3H)-one substituted by a 2-oxopropanoyl group at position 6.
D-erythro-biopterin
A biopterin in which the 1,2-dihydroxypropyl group has (1S,2R)-configuration.
(R)-dyspropterin
A dyspropterin in which the stereocentre at position 6 has R-configuration.
4-amino-5-hydroxy-6-(5-methyl-2-oxo-1,2,3,4-tetrahydropyrimidin-4-yl)-2,5-dihydropyrimidin-2-one
A member of the class of pyrimidones that is 4-amino-5-hydroxy-2,5-dihydropyrimidin-2-one in which the hydrogen at position 6 by a 5-methyl-2-oxo-1,2,3,4-tetrahydropyrimidin-4-yl group.
5-amino-4a-methyl-1,2,3,4,4a,4b,7,8,8a,8b-decahydro-1,3,6,8-tetraazabiphenylene-2,4,7-trione
A member of the class of cyclobutadipyrimidines that is 1,4a,4b,8,8a,8b-hexahydrocyclobuta[1,2-d:4,3-d]dipyrimidine-2,4,7(3H)-trione carrying additional methyl and amino substituents at positions 4a and 5 respectively.
L-Erythro-biopterin
A biopterin in which the 1,2-dihydroxypropyl group has (1R,2S)-configuration; naturally occurring form.
(2r)-hydroxy-4-(9-adenyl)butyric acid
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