Gene Association: HMBS
UniProt Search:
HMBS (PROTEIN_CODING)
Function Description: hydroxymethylbilane synthase
found 85 associated metabolites with current gene based on the text mining result from the pubmed database.
L-Tryptophan
Tryptophan (Trp) or L-tryptophan 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). Amino acids are organic compounds that contain amino (–NH2) and carboxyl (–COOH) functional groups, along with a side chain (R group) specific to each amino acid. L-tryptophan is one of 20 proteinogenic amino acids, i.e., the amino acids used in the biosynthesis of proteins. Tryptophan is found in all organisms ranging from bacteria to plants to animals. It is classified as a non-polar, uncharged (at physiological pH) aromatic amino acid. Tryptophan is an essential amino acid, meaning the body cannot synthesize it, and it must be obtained from the diet. The requirement for tryptophan and protein decreases with age. The minimum daily requirement for adults is 3 mg/kg/day or about 200 mg a day. There is 400 mg of tryptophan in a cup of wheat germ. A cup of low-fat cottage cheese contains 300 mg of tryptophan and chicken and turkey contain up to 600 mg of tryptophan per pound (http://www.dcnutrition.com). Tryptophan is particularly plentiful in chocolate, oats, dried dates, milk, yogurt, cottage cheese, red meat, eggs, fish, poultry, sesame, chickpeas, almonds, sunflower seeds, pumpkin seeds, buckwheat, spirulina, and peanuts. Tryptophan is the precursor of both serotonin and melatonin. Melatonin is a hormone that is produced by the pineal gland in animals, which regulates sleep and wakefulness. Serotonin is a brain neurotransmitter, platelet clotting factor, and neurohormone found in organs throughout the body. Metabolism of tryptophan into serotonin requires nutrients such as vitamin B6, niacin, and glutathione. Niacin (also known as vitamin B3) is an important metabolite of tryptophan. It is synthesized via kynurenine and quinolinic acids, which are products of tryptophan degradation. There are a number of conditions or diseases that are characterized by tryptophan deficiencies. For instance, fructose malabsorption causes improper absorption of tryptophan in the intestine, which reduces levels of tryptophan in the blood and leads to depression. High corn diets or other tryptophan-deficient diets can cause pellagra, which is a niacin-tryptophan deficiency disease with symptoms of dermatitis, diarrhea, and dementia. Hartnups disease is a disorder in which tryptophan and other amino acids are not absorbed properly. Symptoms of Hartnups disease include skin rashes, difficulty coordinating movements (cerebellar ataxia), and psychiatric symptoms such as depression or psychosis. Tryptophan supplements may be useful for treating Hartnups disease. Assessment of tryptophan deficiency is done through studying excretion of tryptophan metabolites in the urine or blood. Blood may be the most sensitive test because the amino acid tryptophan is transported in a unique way. Increased urination of tryptophan breakdown products (such as kynurenine) correlates with increased tryptophan degradation, which occurs with oral contraception, depression, mental retardation, hypertension, and anxiety states. Tryptophan plays a role in "feast-induced" drowsiness. Ingestion of a meal rich in carbohydrates triggers the release of insulin. Insulin, in turn, stimulates the uptake of large neutral branched-chain amino acids (BCAAs) into muscle, increasing the ratio of tryptophan to BCAA in the bloodstream. The increased tryptophan ratio reduces competition at the large neutral amino acid transporter (which transports both BCAAs and tryptophan), resulting in greater uptake of tryptophan across the blood-brain barrier into the cerebrospinal fluid (CSF). Once in the CSF, tryptophan is converted into serotonin and the resulting serotonin is further metabolized into melatonin by the pineal gland, which promotes sleep. Because tryptophan is converted into 5-hydroxytryptophan (5-HTP) which is then converted into the neurotransmitter serotonin, it has been proposed th... L-tryptophan is a white powder with a flat taste. An essential amino acid; occurs in isomeric forms. (NTP, 1992) L-tryptophan is the L-enantiomer of tryptophan. It has a role as an antidepressant, a nutraceutical, a micronutrient, a plant metabolite, a human metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite and a mouse metabolite. It is an erythrose 4-phosphate/phosphoenolpyruvate family amino acid, a proteinogenic amino acid, a tryptophan and a L-alpha-amino acid. It is a conjugate base of a L-tryptophanium. It is a conjugate acid of a L-tryptophanate. It is an enantiomer of a D-tryptophan. It is a tautomer of a L-tryptophan zwitterion. An essential amino acid that is necessary for normal growth in infants and for nitrogen balance in adults. It is a precursor of indole alkaloids in plants. It is a precursor of serotonin (hence its use as an antidepressant and sleep aid). It can be a precursor to niacin, albeit inefficiently, in mammals. L-Tryptophan is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). Tryptophan is the least plentiful of all 22 amino acids and an essential amino acid in humans (provided by food), Tryptophan is found in most proteins and a precursor of serotonin. Tryptophan is converted to 5-hydroxy-tryptophan (5-HTP), converted in turn to serotonin, a neurotransmitter essential in regulating appetite, sleep, mood, and pain. Tryptophan is a natural sedative and present in dairy products, meats, brown rice, fish, and soybeans. (NCI04) Tryptophan is an essential amino acid which is the precursor of serotonin. Serotonin is a brain neurotransmitter, platelet clotting factor and neurohormone found in organs throughout the body. Metabolism of tryptophan to serotonin requires nutrients such as vitamin B6, niacin and glutathione. Niacin is an important metabolite of tryptophan. High corn or other tryptophan-deficient diets can cause pellagra, which is a niacin-tryptophan deficiency disease with symptoms of dermatitis, diarrhea and dementia. Inborn errors of tryptophan metabolism exist where a tumor (carcinoid) makes excess serotonin. Hartnups disease is a disease where tryptophan and other amino acids are not absorbed properly. Tryptophan supplements may be useful in each condition, in carcinoid replacing the over-metabolized nutrient and in Hartnups supplementing a malabsorbed nutrient. Some disorders of excess tryptophan in the blood may contribute to mental retardation. Assessment of tryptophan deficiency is done through studying excretion of tryptophan metabolites in the urine or blood. Blood may be the most sensitive test because the amino acid tryptophan is transported in a unique way. Increased urination of tryptophan fragments correlates with increased tryptophan degradation, which occurs with oral contraception, depression, mental retardation, hypertension and anxiety states. The requirement for tryptophan and protein decreases with age. Adults minimum daily requirement is 3 mg/kg/day or about 200 mg a day. This may be an underestimation, for there are 400 mg of tryptophan in just a cup of wheat germ. A cup of low fat cottage cheese contains 300 mg of tryptophan and chicken and turkey contain up to 600 mg per pound. An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals. See also: Serotonin; tryptophan (component of); Chamomile; ginger; melatonin; thiamine; tryptophan (component of) ... View More ... Constituent of many plants. Enzymatic hydrolysis production of most plant and animal proteins. Dietary supplement, nutrient D002491 - Central Nervous System Agents > D011619 - Psychotropic Drugs > D000928 - Antidepressive Agents N - Nervous system > N06 - Psychoanaleptics > N06A - Antidepressants COVID info from PDB, Protein Data Bank The L-enantiomer of tryptophan. Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Acquisition and generation of the data is financially supported in part by CREST/JST. [Raw Data] CBA09_Tryptophan_pos_30eV_1-1_01_662.txt [Raw Data] CBA09_Tryptophan_pos_20eV_1-1_01_661.txt [Raw Data] CBA09_Tryptophan_neg_30eV_1-1_01_716.txt [Raw Data] CBA09_Tryptophan_pos_10eV_1-1_01_660.txt [Raw Data] CBA09_Tryptophan_neg_10eV_1-1_01_714.txt [Raw Data] CBA09_Tryptophan_neg_40eV_1-1_01_717.txt [Raw Data] CBA09_Tryptophan_neg_20eV_1-1_01_715.txt [Raw Data] CBA09_Tryptophan_pos_50eV_1-1_01_664.txt [Raw Data] CBA09_Tryptophan_neg_50eV_1-1_01_718.txt [Raw Data] CBA09_Tryptophan_pos_40eV_1-1_01_663.txt IPB_RECORD: 253; CONFIDENCE confident structure KEIO_ID T003 DL-Tryptophan is an endogenous metabolite. L-Tryptophan (Tryptophan) is an essential amino acid that is the precursor of serotonin, melatonin, and vitamin B3[1]. L-Tryptophan (Tryptophan) is an essential amino acid that is the precursor of serotonin, melatonin, and vitamin B3[1].
3,4-Dimethoxybenzaldehyde
Veratraldehyde appears as needles or chunky light peach powder. Has an odor of vanilla beans. (NTP, 1992) Veratraldehyde is a dimethoxybenzene that is benzaldehyde substituted by methoxy groups at positions 3 and 4. It is found in peppermint, ginger, raspberry, and other fruits. It has a role as an antifungal agent. It is a member of benzaldehydes and a dimethoxybenzene. 3,4-Dimethoxybenzaldehyde is a natural product found in Polygala senega, Pluchea sagittalis, and other organisms with data available. 3,4-Dimethoxybenzaldehyde is found in fruits. 3,4-Dimethoxybenzaldehyde is isolated from peppermint, raspberry, ginger and Bourbon vanilla. 3,4-Dimethoxybenzaldehyde is used in vanilla flavour Isolated from peppermint, raspberry, ginger and Bourbon vanilla. It is used in vanilla flavours. 3,4-Dimethoxybenzaldehyde is found in peppermint, herbs and spices, and fruits. CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3940; ORIGINAL_PRECURSOR_SCAN_NO 3939 CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3955; ORIGINAL_PRECURSOR_SCAN_NO 3954 CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3930; ORIGINAL_PRECURSOR_SCAN_NO 3929 CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3941; ORIGINAL_PRECURSOR_SCAN_NO 3940 CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3963; ORIGINAL_PRECURSOR_SCAN_NO 3961 CONFIDENCE standard compound; INTERNAL_ID 1016; DATASET 20200303_ENTACT_RP_MIX508; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 3961; ORIGINAL_PRECURSOR_SCAN_NO 3960 Veratraldehyde is an important chemical used in perfumery, agrochemical, and pharmaceutical industries. Veratraldehyde is an important chemical used in perfumery, agrochemical, and pharmaceutical industries.
Caffeoyl-CoA
Caffeoyl-CoA is an acyl CoA that results from the formal condensation of the thiol group of coenzyme A with the carboxy group of caffeic acid. It is functionally related to a caffeic acid. It is a conjugate acid of a caffeoyl-CoA(4-). An acyl CoA that results from the formal condensation of the thiol group of coenzyme A with the carboxy group of caffeic acid.
5-Aminolevulinic acid
5-Aminolevulinic acid, also known as 5-aminolevulinate or 5-amino-4-oxopentanoate, belongs to the class of organic compounds known as delta amino acids and derivatives. Delta amino acids and derivatives are compounds containing a carboxylic acid group and an amino group at the C5 carbon atom. 5-Aminolevulinic acid is a very hydrophobic molecule, practically insoluble in water, and relatively neutral. 5-Aminolevulinic acid exists in all living species, ranging from bacteria to humans. 5-aminolevulinic acid can be biosynthesized from glycine and succinyl-CoA by the enzyme 5-aminolevulinate synthase. The simplest delta-amino acid in which the hydrogens at the gamma position are replaced by an oxo group. In humans, 5-aminolevulinic acid is involved in the metabolic disorder called the dimethylglycine dehydrogenase deficiency pathway. Outside of the human body, 5-Aminolevulinic acid has been detected, but not quantified in several different foods, such as american butterfish, vaccinium (blueberry, cranberry, huckleberry), amaranths, purple mangosteens, and garden cress. Used (in the form of the hydrochloride salt) in combination with blue light illumination for the treatment of minimally to moderately thick actinic keratosis of the face or scalp. It is metabolised to protoporphyrin IX, a photoactive compound which accumulates in the skin. An intermediate in heme synthesis. This is the first compound in the porphyrin synthesis pathway. It is produced by the enzyme ALA synthase, from glycine and succinyl CoA. This reaction is known as the Shemin pathway. Aminolevulinic acid plus blue light illumination using a blue light photodynamic therapy illuminator is indicated for the treatment of minimally to moderately thick actinic keratoses of the face or scalp. [HMDB]. 5-Aminolevulinic acid is found in many foods, some of which are fireweed, chia, sesbania flower, and taro. L - Antineoplastic and immunomodulating agents > L01 - Antineoplastic agents > L01X - Other antineoplastic agents > L01XD - Sensitizers used in photodynamic/radiation therapy Acquisition and generation of the data is financially supported in part by CREST/JST. D011838 - Radiation-Sensitizing Agents > D017319 - Photosensitizing Agents C1420 - Photosensitizing Agent D003879 - Dermatologic Agents KEIO_ID A052
Nandrolone
Nandrolone is a C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of estradiol to resemble testosterone, but it has one less carbon atom at the 19 position (Pubchem). Nandrolone is an anabolic steroid occurring naturally in the human body, albeit in small quantities. Nandrolone is most commonly sold commercially as its decanoate ester (Deca-Durabolin) and less commonly as a phenylpropionate ester (Durabolin). Nandrolone use is indirectly detectable in urine tests by testing for the presence of 19-norandrosterone, a metabolism product of this molecule. The International Olympic Committee has set a limit of 2 ng per ml of urine as the upper limit, beyond which an athlete is suspected of doping (Wikipedia). Nandrolone is a C18 steroid with androgenic and anabolic properties. It is generally prepared from alkyl ethers of estradiol to resemble testosterone but less one carbon at the 19 position. -- Pubchem; Nandrolone is an anabolic steroid occurring naturally in the human body, albeit in small quantities. Nandrolone is most commonly sold commercially as its decanoate ester (Deca-Durabolin) and less commonly as a phenylpropionate ester (Durabolin). Nandrolone use is indirectly detectable in urine tests by testing for the presence of 19-norandrosterone, a metabolism product of this molecule. The International Olympic Committee has set a limit of 2 ng per ml of urine as the upper limit, beyond which an athlete is suspected of doping. -- Wikipedia [HMDB] A - Alimentary tract and metabolism > A14 - Anabolic agents for systemic use > A14A - Anabolic steroids > A14AB - Estren derivatives D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones > D045930 - Anabolic Agents D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones > D000728 - Androgens C147908 - Hormone Therapy Agent > C548 - Therapeutic Hormone > C1636 - Therapeutic Steroid Hormone C147908 - Hormone Therapy Agent > C548 - Therapeutic Hormone > C2360 - Anabolic Steroid S - Sensory organs > S01 - Ophthalmologicals
Hypoxanthine
Hypoxanthine, also known as purine-6-ol or Hyp, belongs to the class of organic compounds known as purines. Purines are a bicyclic aromatic compound made up of a pyrimidine ring fused to an imidazole ring. Hypoxanthine is also classified as an oxopurine, Hypoxanthine is a naturally occurring purine derivative and a reaction intermediate in the metabolism of adenosine and in the formation of nucleic acids by the nucleotide salvage pathway. Hypoxanthine exists in all living species, ranging from bacteria to plants to humans. Hypoxanthine has been detected, but not quantified in, several different foods, such as radish (var.), mountain yams, welsh onions, greenthread tea, and common beets. Hypoxanthine is occasionally found as a constituent of nucleic acids, where it is present in the anticodon of tRNA in the form of its nucleoside inosine. Biologically, hypoxanthine can be formed a number of ways. For instance, it is one of the products of the action of xanthine oxidase on xanthine. However, more frequently xanthine is formed from oxidation of hypoxanthine by xanthine oxidoreductase. The enzyme hypoxanthine-guanine phosphoribosyltransferase converts hypoxanthine into IMP in the nucleotide salvage pathway. Hypoxanthine is also a spontaneous deamination product of adenine. Under normal circumstances hypoxanthine is readily converted to uric acid. In this process, hypoxanthine is first oxidized to xanthine, which is further oxidized to uric acid by xanthine oxidase. Molecular oxygen, the oxidant in both reactions, is reduced to H2O2 and other reactive oxygen species. In humans, uric acid is the final product of purine degradation and is excreted in the urine. Within humans, hypoxanthine participates in a number of other enzymatic reactions. In particular, hypoxanthine and ribose 1-phosphate can be biosynthesized from inosine through its interaction with the enzyme purine nucleoside phosphorylase. Hypoxanthine is also involved in the metabolic disorder called the purine nucleoside phosphorylase deficiency. Purine nucleoside phosphorylase (PNP) deficiency is a disorder of the immune system (primary immunodeficiency) characterized by recurrent infections, neurologic symptoms, and autoimmune disorders. PNP deficiency causes a shortage of white blood cells, called T-cells, that help fight infection. Affected individuals develop neurologic symptoms, such as stiff or rigid muscles (spasticity), uncoordinated movements (ataxia), developmental delay, and intellectual disability. PNP deficiency is associated with an increased risk to develop autoimmune disorders, such as autoimmune hemolytic anemia, idiopathic thrombocytopenic purpura (ITP), autoimmune neutropenia, thyroiditis, and lupus. [Spectral] Hypoxanthine (exact mass = 136.03851) and Adenine (exact mass = 135.0545) were not completely separated on HPLC under the present analytical conditions as described in AC$XXX. Additionally some of the peaks in this data contains dimers and other unidentified ions. Occurs widely in plant and animal tissue (CCD). Hypoxanthine is found in many foods, some of which are japanese chestnut, parsnip, okra, and horned melon. Hypoxanthine. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=68-94-0 (retrieved 2024-07-02) (CAS RN: 68-94-0). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia.
Porphobilinogen
Porphobilinogen (PBG) is a pyrrole-containing intermediate in the biosynthesis of porphyrins. It is generated from aminolevulinate (ALA) by the enzyme ALA dehydratase. Porphobilinogen is then converted into hydroxymethylbilane by the enzyme porphobilinogen deaminase (also known as hydroxymethylbilane synthase). Under certain conditions, porphobilinogen can act as a phototoxin, a neurotoxin, and a metabotoxin. A phototoxin leads to cell damage upon exposure to light. A neurotoxin causes damage to nerve cells and nerve tissues. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of porphyrins are associated with porphyrias such as porphyria variegate, acute intermittent porphyria, and hereditary coproporphyria (HCP). There are several types of porphyrias (most are inherited). Hepatic porphyrias are characterized by acute neurological attacks (seizures, psychosis, extreme back and abdominal pain, and an acute polyneuropathy), while the erythropoietic forms present with skin problems (usually a light-sensitive blistering rash and increased hair growth). The neurotoxicity of porphyrins may be due to their selective interactions with tubulin, which disrupt microtubule formation and cause neural malformations (PMID: 3441503). Porphobilinogen is a pyrrole involved in porphyrin metabolism. -- Wikipedia; It consists of a pyrrole ring with acetyl, propionyl, and aminomethyl side chains; It is a key monopyrrolic intermediate in porphyrin, chlorophyll and vitamin B12 biosynthesis. Porphobilinogen is generated by the enzyme ALA dehydratase by combining two molecules of dALA together, and converted into hydroxymethyl bilane by the enzyme porphobilinogen deaminase. 4 molecules of porphobilinogen are condensed to form one molecule of uroporphyrinogen III, which is then converted successively to coproporphyrinogen III, protoporphyrin IX, and heme. Porphobilinogen is produced in excess and excreted in the urine in acute intermittent porphyria and several other porphyrias. [HMDB]. Porphobilinogen is found in many foods, some of which are strawberry guava, amaranth, parsnip, and ostrich fern.
Protoporphyrin IX
Protoporphyrins are tetrapyrroles containing 4 methyl, 2 propionic, and 2 vinyl side chains. Protoporphyrin is produced by oxidation of the methylene bridge of protoporphyrinogen. Protoporphyrin IX is the only naturally occurring isomer; it is an intermediate in heme biosynthesis, combining with ferrous iron to form protoheme IX, the heme prosthetic group of hemoglobin. Protoporphyrin IX is created by the enzyme protoporphyrinogen oxidase. The enzyme ferrochelatase converts it into heme. Protoporphyrin IX naturally occurs in small amounts in feces. Protoporphyrin IX is also responsible for the brown pigment (ooporphyrin) of birds eggs. Protoporphyrin IX is used as a branch point in the biosynthetic pathway leading to heme (by insertion of iron) and chlorophylls (by insertion of Mg and further side-chain transformation). Protoporphyrin IX can be used to treat liver disorders, mainly as the sodium salt. Under certain conditions, protoporphyrin IX can act as a neurotoxin, a phototoxin, and a metabotoxin. A neurotoxin causes damage to nerve cells and nerve tissues. A phototoxin causes cell damage upon exposure to light. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of porphyrins are associated with porphyrias such as porphyria variegate, acute intermittent porphyria, and hereditary coproporphyria (HCP). In particular, it is accumulated and excreted excessively in the feces in acute intermittent porphyria, protoporphyria, and variegate porphyria. There are several types of porphyrias (most are inherited). Hepatic porphyrias are characterized by acute neurological attacks (seizures, psychosis, extreme back and abdominal pain, and an acute polyneuropathy), while the erythropoietic forms present with skin problems (usually a light-sensitive blistering rash and increased hair growth). The neurotoxicity of porphyrins may be due to their selective interactions with tubulin, which disrupt microtubule formation and cause neural malformations (PMID: 3441503). obtained by demetallation of Haemin, occurs in small amounts in faeces. Brown pigment (Ooporphyrin) of birds eggs. Isolated from Atolla wyvillei (CCD). Protoporphyrin is found in red beetroot. D011838 - Radiation-Sensitizing Agents > D017319 - Photosensitizing Agents COVID info from COVID-19 Disease Map C1420 - Photosensitizing Agent D003879 - Dermatologic Agents Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Protoporphyrin IX is the final intermediate in the heme biosynthetic pathway. Protoporphyrin IX is the final intermediate in the heme biosynthetic pathway.
Hydroxyzine
A histamine H1 receptor antagonist that is effective in the treatment of chronic urticaria, dermatitis, and histamine-mediated pruritus. Unlike its major metabolite cetirizine, it does cause drowsiness. It is also effective as an antiemetic, for relief of anxiety and tension, and as a sedative. [PubChem] CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8146; ORIGINAL_PRECURSOR_SCAN_NO 8142 CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8167; ORIGINAL_PRECURSOR_SCAN_NO 8166 CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8152; ORIGINAL_PRECURSOR_SCAN_NO 8147 CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8169; ORIGINAL_PRECURSOR_SCAN_NO 8167 CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8128; ORIGINAL_PRECURSOR_SCAN_NO 8124 CONFIDENCE standard compound; INTERNAL_ID 1306; DATASET 20200303_ENTACT_RP_MIX504; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 8120; ORIGINAL_PRECURSOR_SCAN_NO 8118 N - Nervous system > N05 - Psycholeptics > N05B - Anxiolytics > N05BB - Diphenylmethane derivatives D018377 - Neurotransmitter Agents > D018494 - Histamine Agents > D006633 - Histamine Antagonists C308 - Immunotherapeutic Agent > C29578 - Histamine-1 Receptor Antagonist D003879 - Dermatologic Agents > D000982 - Antipruritics Hydroxyzine, a benzodiazepine antihistamine agent, acts as an orally active histamine?H1-receptor and serotonin antagonist. Hydroxyzine has anxiolytic effect and can be used for the research of generalised anxiety disorder[1].
Phenobarbital
Phenobarbital is only found in individuals that have used or taken this drug. It is a barbituric acid derivative that acts as a nonselective central nervous system depressant.Phenobarbital acts on GABAA receptors, increasing synaptic inhibition. This has the effect of elevating seizure threshold and reducing the spread of seizure activity from a seizure focus. Phenobarbital may also inhibit calcium channels, resulting in a decrease in excitatory transmitter release. The sedative-hypnotic effects of phenobarbital are likely the result of its effect on the polysynaptic midbrain reticular formation, which controls CNS arousal. Phenobarbital appears as odorless white crystalline powder or colorless crystals. A saturated aqueous solution is acid to litmus (approximately pH 5). Slightly bitter taste. (NTP, 1992) Phenobarbital is a member of the class of barbiturates, the structure of which is that of barbituric acid substituted at C-5 by ethyl and phenyl groups. It has a role as an anticonvulsant, a sedative, an excitatory amino acid antagonist and a drug allergen. Phenobarbital is a DEA Schedule IV controlled substance. Substances in the DEA Schedule IV have a low potential for abuse relative to substances in Schedule III. It is a Depressants substance. A barbituric acid derivative that acts as a nonselective central nervous system depressant. It promotes binding to inhibitory gamma-aminobutyric acid subtype receptors, and modulates chloride currents through receptor channels. It also inhibits glutamate induced depolarizations. Phenobarbital is a barbiturate that is widely used as a sedative and an antiseizure medication. Phenobarbital has been linked to rare instances of idiosyncratic liver injury that can be severe and even fatal. Phenobarbital is a long-acting barbituric acid derivative with antipsychotic property. Phenobarbital binds to and activates the gamma-aminobutyric acid (GABA)-A receptor, thereby mimicking the inhibitory actions of GABA in the brain. The activation effects of the phenobarbital-receptor-ionophore complex include increased frequency of chloride channel openings, membrane hyperpolarization and ultimately synaptic inhibition and decreased neuronal excitability. In addition, this agent inhibits glutamate induced depolarization. Phenobarbital is only found in individuals that have used or taken this drug. It is a barbituric acid derivative that acts as a nonselective central nervous system depressant. It promotes binding to inhibitory gamma-aminobutyric acid subtype receptors, and modulates chloride currents through receptor channels. It also inhibits glutamate induced depolarizations. [PubChem] Phenobarbital acts on GABAA receptors, increasing synaptic inhibition. This has the effect of elevating seizure threshold and reducing the spread of seizure activity from a seizure focus. Phenobarbital may also inhibit calcium channels, resulting in a decrease in excitatory transmitter release. The sedative-hypnotic effects of phenobarbital are likely the result of its effect on the polysynaptic midbrain reticular formation, which controls CNS arousal. A barbituric acid derivative that acts as a nonselective central nervous system depressant. It potentiates GAMMA-AMINOBUTYRIC ACID action on GABA-A RECEPTORS, and modulates chloride currents through receptor channels. It also inhibits glutamate induced depolarizations.
Tetrahydrocortisone
Cortisol is a corticosteroid hormone that is involved in the response to stress; it increases blood pressure and blood sugar levels and suppresses the immune system. Synthetic cortisol, also known as hydrocortisone, is used as a drug mainly to fight allergies and inflammation. -- Wikipedia; As an oral or injectable drug, cortisol is also known as hydrocortisone. It is used as an immunosuppressive drug, given by injection in the treatment of severe allergic reactions such as anaphylaxis and angioedema, in place of prednisolone in patients who need steroid treatment but cannot take oral medication, and peri-operatively in patients on long-term steroid treatment to prevent an Addisonian crisis. -- Wikipedia [HMDB] Cortisol is a corticosteroid hormone that is involved in the response to stress; it increases blood pressure and blood sugar levels and suppresses the immune system. Synthetic cortisol, also known as hydrocortisone, is used as a drug mainly to fight allergies and inflammation. -- Wikipedia; As an oral or injectable drug, cortisol is also known as hydrocortisone. It is used as an immunosuppressive drug, given by injection in the treatment of severe allergic reactions such as anaphylaxis and angioedema, in place of prednisolone in patients who need steroid treatment but cannot take oral medication, and peri-operatively in patients on long-term steroid treatment to prevent an Addisonian crisis. -- Wikipedia. D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisone is a stress-induced hormone. Tetrahydrocortisone is also a urinary metabolite of Cortisone derived from the reduction of Cortisone by 5-reductase[1].
3b-Allotetrahydrocortisol
3b-Allotetrahydrocortisol is one of the tetrahydrometabolites of cortisol. The 11-beta-hydroxysteroid dehydrogenase (11beta-HSD) is responsible for the interconversion of both the hormonally inactive cortisone and the active cortisol, which has implications in the pathogenesis of numerous diseases, as reflected in the ratio of tetrahydrometabolites of cortisol. (PMID: 16310418). The daily excretion of allotetrahydrocortisol is above normal in hyperthyroid patients; In contrast, in hyperthyroidism the excretion is diminished below normal levels to approximately half that of normal subjects. (PMID 13906284). A decreased activity of the enzyme 11beta-HSD produces a pattern of urinary steroid metabolites with an abnormal elevation of tetrahydrocortisol and allo-tetrahydrocortisol compared to tetrahydrocortisone; this pattern of steroid excretion is essential for the diagnosis of the syndrome of apparent mineralocorticoid excess type 1. (PMID: 8834992). 3b-Allotetrahydrocortisol is one of the tetrahydrometabolites of cortisol. The 11-beta-hydroxysteroid dehydrogenase (11beta-HSD) is responsible for the interconversion of both the hormonally inactive cortisone and the active cortisol, which has implications in the pathogenesis of numerous diseases, as reflected in the ratio of tetrahydrometabolites of cortisol. (PMID: 16310418) D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisol is cortisol metabolite. The urinary Tetrahydrocortisol/Tetrahydrocortisone ratio decreases with increasing 11β-hydroxysteroid dehydrogenase (11β-HSD) activity[1][2].
Pyrrole
Pyrrole is found in corn. Pyrrole is a flavouring ingredient Pyrrole has very low basicity compared to conventional amines and some other aromatic compounds like pyridine. This decreased basicity is attributed to the delocalization of the lone pair of electrons of the nitrogen atom in the aromatic ring. Pyrrole is a very weak base with a pKaH of about 4. Protonation results in loss of aromaticity, and is, therefore, unfavorable. Pyrrole is a heterocyclic aromatic organic compound, a five-membered ring with the formula C4H4NH. Substituted derivatives are also called pyrroles. For example, C4H4NCH3 is N-methylpyrrole. Porphobilinogen is a trisubstituted pyrrole, which is the biosynthetic precursor to many natural products. The starting materials in the Piloty-Robinson pyrrole synthesis are 2 equivalents of an aldehyde and hydrazine. The product is a pyrrole with specific substituents in the 3 and 4 positions. The aldehyde reacts with the diamine to an intermediate di-imine (R C=N N=C R), which, with added hydrochloric acid, gives ring-closure and loss of ammonia to the pyrrole CONFIDENCE standard compound; INTERNAL_ID 8155 Flavouring ingredient
Hydroxyhydroquinone
1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1]. 1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1].
Hexachlorobenzene
Hexachlorobenzene is an Agricultural fungicid D016573 - Agrochemicals D010575 - Pesticides
Chebulinic acid
Chebulinic acid. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=18942-26-2 (retrieved 2024-09-27) (CAS RN: 18942-26-2). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).
Phenylhydrazine
Phenylhydrazine, also known as hydrazinobenzene or phenyldiazane, is a member of the class of compounds known as phenylhydrazines. Phenylhydrazines are compounds containing a phenylhydrazide moiety, which consists of a hydrazide substituent attached to a phenyl group. Phenylhydrazine is soluble (in water) and a very strong basic compound (based on its pKa). Phenylhydrazine can be found in sweet bay, which makes phenylhydrazine a potential biomarker for the consumption of this food product. Phenylhydrazine is the chemical compound with the formula C6H5NHNH2. It is often abbreviated as PhNHNH2 . D009676 - Noxae > D016877 - Oxidants
Chlorophyll a
Chlorophyll a is found in common wheat. Chlorophyll a is used in food processing as an appearance control agent for colours.Chlorophyll is a chlorin pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorin ring is a magnesium ion. For the structures depicted in this article, some of the ligands attached to the Mg2+ center are omitted for clarity. The chlorin ring can have several different side chains, usually including a long phytol chain. There are a few different forms that occur naturally, but the most widely distributed form in terrestrial plants is chlorophyll a. The general structure of chlorophyll a was elucidated by Hans Fischer in 1940, and by 1960, when most of the stereochemistry of chlorophyll a was known, Robert Burns Woodward published a total synthesis of the molecule as then known. In 1967, the last remaining stereochemical elucidation was completed by Ian Fleming, and in 1990 Woodward and co-authors published an updated synthesis. Chlorophyll is a green pigment found in most plants, algae, and cyanobacteria. Its name is derived from the Greek (chloros "green") and (phyllon "leaf"). Chlorophyll absorbs light most strongly in the blue and red but poorly in the green portions of the electromagnetic spectrum, hence the green colour of chlorophyll-containing tissues such as plant leaves. Chlorophyll itself is bound to proteins and can transfer the absorbed energy in the required direction. Protochlorophyllide, differently, mostly occur in the free form and under light conditions act as photosensitizer, forming highly toxic free radicals. Hence plants need an efficient mechanism of regulating the amount of chlorophyll precursor. In angiosperms, this is done at the step of aminolevulinic acid (ALA), one of the intermediate compounds in the biosynthesis pathway. Plants that are fed by ALA accumulate high and toxic levels of protochlorophyllide, so do the mutants with the damaged regulatory system. Chlorosis is a condition in which leaves produce insufficient chlorophyll, turning them yellow. Chlorosis can be caused by a nutrient deficiency including iron - called iron chlorosis, or in a shortage of magnesium or nitrogen. Soil pH sometimes play a role in nutrient-caused chlorosis, many plants are adapted to grow in soils with specific pHs and their ability to absorb nutrients from the soil can be dependent on the soil pH. Chlorosis can also be caused by pathogens including viruses, bacteria and fungal infections or sap sucking insects It is used in food processing as an appearance control agent for colours
Chlorophyll b
Heme
Heme is the color-furnishing portion of hemoglobin. It is found free in tissues and as the prosthetic group in many hemeproteins. A heme or haem is a prosthetic group that consists of an iron atom contained in the center of a large heterocyclic organic ring called a porphyrin. Not all porphyrins contain iron, but a substantial fraction of porphyrin-containing metalloproteins have heme as their prosthetic subunit; these are known as hemoproteins. Protoheme ix, also known as ferroprotoheme or [fe(ppix)], is a member of the class of compounds known as metalloporphyrins. Metalloporphyrins are polycyclic compounds containing a porphyrin moiety and a metal atom. Protoheme ix can be found in a number of food items such as orange mint, cucumber, deerberry, and pear, which makes protoheme ix a potential biomarker for the consumption of these food products. Ferroheme, a complex of ferrous iron and a porphyrin, is an isosteric inhibitor of fatty acid binding to rat liver fatty acid binding protein[1][2]. Ferroheme, a complex of ferrous iron and a porphyrin, is an isosteric inhibitor of fatty acid binding to rat liver fatty acid binding protein[1][2].
Succinyl-CoA
Succinyl-CoA is an important intermediate in the citric acid cycle, where it is synthesized from α-Ketoglutarate by α-ketoglutarate dehydrogenase (EC 1.2.4.2) through decarboxylation, and is converted into succinate through the hydrolytic release of coenzyme A by succinyl-CoA synthetase (EC 6.2.1.5). Succinyl-CoA may be an end product of peroxisomal beta-oxidation of dicarboxylic fatty acids; the identification of an apparently specific succinyl-CoA thioesterase (ACOT4, EC 3.1.2.3, hydrolyzes succinyl-CoA) in peroxisomes strongly suggests that succinyl-CoA is formed in peroxisomes. Acyl-CoA thioesterases (ACOTs) are a family of enzymes that catalyze the hydrolysis of the CoA esters of various lipids to the free acids and coenzyme A, thereby regulating levels of these compounds. (PMID: 16141203) [HMDB]. Succinyl-CoA is found in many foods, some of which are fruits, sea-buckthornberry, pomegranate, and sweet orange. Succinyl-CoA is an important intermediate in the citric acid cycle, where it is synthesized from α-Ketoglutarate by α-ketoglutarate dehydrogenase (EC 1.2.4.2) through decarboxylation, and is converted into succinate through the hydrolytic release of coenzyme A by succinyl-CoA synthetase (EC 6.2.1.5). Succinyl-CoA may be an end product of peroxisomal beta-oxidation of dicarboxylic fatty acids; the identification of an apparently specific succinyl-CoA thioesterase (ACOT4, EC 3.1.2.3, hydrolyzes succinyl-CoA) in peroxisomes strongly suggests that succinyl-CoA is formed in peroxisomes. Acyl-CoA thioesterases (ACOTs) are a family of enzymes that catalyze the hydrolysis of the CoA esters of various lipids to the free acids and coenzyme A, thereby regulating levels of these compounds. (PMID: 16141203).
Tetrahydrofolic acid
Tetrahydrofolate is a soluble coenzyme (vitamin B9) that is synthesized de novo by plants and microorganisms, and absorbed from the diet by animals. It is composed of three distinct parts: a pterin ring, a p-ABA (p-aminobenzoic acid) and a polyglutamate chain with a number of residues varying between 1 and 8. Only the tetra-reduced form of the molecule serves as a coenzyme for C1 transfer reactions. In biological systems, the C1-units exist under various oxidation states and the different tetrahydrofolate derivatives constitute a family of related molecules named indistinctly under the generic term folate. (PMID 16042593). Folate is important for cells and tissues that rapidly divide. Cancer cells divide rapidly, and drugs that interfere with folate metabolism are used to treat cancer. Methotrexate is a drug often used to treat cancer because it inhibits the production of the active form, tetrahydrofolate. Unfortunately, methotrexate can be toxic, producing side effects such as inflammation in the digestive tract that make it difficult to eat normally. -- Wikipedia; Signs of folic acid deficiency are often subtle. Diarrhea, loss of appetite, and weight loss can occur. Additional signs are weakness, sore tongue, headaches, heart palpitations, irritability, and behavioral disorders. Women with folate deficiency who become pregnant are more likely to give birth to low birth weight and premature infants, and infants with neural tube defects. In adults, anemia is a sign of advanced folate deficiency. In infants and children, folate deficiency can slow growth rate. Some of these symptoms can also result from a variety of medical conditions other than folate deficiency. It is important to have a physician evaluate these symptoms so that appropriate medical care can be given. -- Wikipedia; Folinic acid is a form of folate that can help rescue or reverse the toxic effects of methotrexate. Folinic acid is not the same as folic acid. Folic acid supplements have little established role in cancer chemotherapy. There have been cases of severe adverse effects of accidental substitution of folic acid for folinic acid in patients receiving methotrexate cancer chemotherapy. It is important for anyone receiving methotrexate to follow medical advice on the use of folic or folinic acid supplements. -- Wikipedia. Low concentrations of folate, vitamin B12, or vitamin B6 may increase the level of homocysteine, an amino acid normally found in blood. There is evidence that an elevated homocysteine level is an independent risk factor for heart disease and stroke. The evidence suggests that high levels of homocysteine may damage coronary arteries or make it easier for blood clotting cells called platelets to clump together and form a clot. However, there is currently no evidence available to suggest that lowering homocysteine with vitamins will reduce your risk of heart disease. Clinical intervention trials are needed to determine whether supplementation with folic acid, vitamin B12 or vitamin B6 can lower your risk of developing coronary heart disease. -- Wikipedia. Tetrahydrofolate is a soluble coenzyme (vitamin B9) that is synthesized de novo by plants and microorganisms, and absorbed from the diet by animals. It is composed of three distinct parts: a pterin ring, a p-ABA (p-aminobenzoic acid) and a polyglutamate chain with a number of residues varying between 1 and 8. Only the tetra-reduced form of the molecule serves as a coenzyme for C1 transfer reactions. In biological systems, the C1-units exist under various oxidation states and the different tetrahydrofolate derivatives constitute a family of related molecules named indistinctly under the generic term folate. (PMID 16042593)
Hydroxymethylbilane
Hydroxymethylbilane is a molecule involved in the metabolism of porphyrin. In the third step, it is generated by the enzyme porphobilinogen deaminase , and in the next step the enzyme uroporphyrinogen III synthase converts it into uroporphyrinogen III. -- Wikipedia [HMDB]. Hydroxymethylbilane is found in many foods, some of which are alpine sweetvetch, elliotts blueberry, chinese broccoli, and new zealand spinach. Hydroxymethylbilane is a molecule involved in the metabolism of porphyrin. In the third step, it is generated by the enzyme porphobilinogen deaminase , and in the next step the enzyme uroporphyrinogen III synthase converts it into uroporphyrinogen III. -- Wikipedia.
Uroporphyrinogen III
Uroporphyrinogens are porphyrinogen variants in which each pyrrole ring has one acetate side chain and one propionate side chain; it is formed by condensation 4 four molecules of porphobilinogen. 4 isomers are possible but only 2 commoly are found, types I and III. Uroporphyrinogen III is a functional intermediate in heme biosynthesis while Uroporphyrinogen I is produced in an abortive side reaction. COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Uroporphyrin III
Uroporphyrin is the porphyrin produced by oxidation of the methylene bridges in uroporphyrinogen. Uroporphyrins have four acetic acid and four propionic acid side chains attached to their pyrrole rings. The enzyme uroporphyrinogen I synthase catalyzes the formation of hydroxymethylbilane from four molecules of porphobilinogen. Uroporphyrinogen III cosynthase then catalyzes the conversion of hydroxymethylbilane into uroporphyrinogen III. Otherwise, hydroxymethylbilane cyclizes nonenzymatically to form uroporphyrinogen I. Uroporphyrinogen I and III yield their respective uroporphyrins via autooxidation or their respective coproporphyrinogens via decarboxylation. Excessive amounts of uroporphyrin I are excreted in congenital erythropoietic porphyria, and both uroporphyrin I and uroporphyrin III are excreted in porphyria cutanea tarda. Uroporphyrin I and III are the most common isomers. Under certain conditions, uroporphyrin III can act as a phototoxin, a neurotoxin, and a metabotoxin. A phototoxin leads to cell damage upon exposure to light. A neurotoxin causes damage to nerve cells and nerve tissues. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of porphyrins are associated with porphyrias such as porphyria variegate, acute intermittent porphyria, porphyria cutanea tarda, and hereditary coproporphyria (HCP). There are several types of porphyrias (most are inherited). Hepatic porphyrias are characterized by acute neurological attacks (seizures, psychosis, extreme back and abdominal pain, and an acute polyneuropathy), while the erythropoietic forms present with skin problems (usually a light-sensitive blistering rash and increased hair growth). The neurotoxicity of porphyrins may be due to their selective interactions with tubulin, which disrupt microtubule formation and cause neural malformations (PMID: 3441503). Occurs in urine in small amounts as by-product of haem biosynthesis, also in Rhodopseudomonas spheroides (CCD). Uroporphyrin III is found in soy bean.
Gamma-delta-Dioxovaleric acid
gamma-delta-Dioxovaleric acid (DOVA) is the final oxidation product of 5-aminolevulinic acid, a precursor of porphyrin in the biosynthesis of heme. It can accumulate in liver, brain, and other organs under pathological conditions such as acute intermittent porphyria. [HMDB] Gamma-delta-Dioxovaleric acid (DOVA) is the final oxidation product of 5-aminolevulinic acid, a precursor of porphyrin in the biosynthesis of heme. It can accumulate in liver, brain, and other organs under pathological conditions such as acute intermittent porphyria.
Protochlorophyllide
Protochlorophyllide is found in fruits. Protochlorophyllide is isolated from the seed husks of Cucurbita pepo Chlorophyll itself is bound to proteins and can transfer the absorbed energy in the required direction. Protochlorophyllide, differently, mostly occurs in the free form and under light conditions acts as photosensitizer, forming highly toxic free radicals. Hence plants need an efficient mechanism of regulating the amount of chlorophyll precursor. In angiosperms, this is done at the step of D-Aminolevulinic acid (ALA), one of the intermediate compounds in the biosynthesis pathway. Plants that are fed by ALA accumulate high and toxic levels of protochlorophyllide, so do the mutants with the damaged regulatory system. Despite of numerous past attempts to find the mutant that overacumulates protochlorophyllide under usual conditions, only one such gene (flu) is currently (2009) known. Flu (first described in ) is a nuclear - encoded, chloroplast - located protein that appears containing only protein - protein interaction sites. It is currently not know which other proteins interact through this linker. The regulatory protein is a transmembrane protein that is located in the thylakoid membrane. Later it was discovered that Tigrina mutants in barley, known long time ago, are also mutated in the same gene It is not obvious why no mutants of any other gene were observed; maybe mutations in other proteins, involved into the regulatory chain, are fatal. Flu is a single gene, not a member of the gene family. Protochlorophyllide , more accurate monovinyl protochlorophyllide, is an immediate precursor of chlorophyll a that lacks the phytol side chain of chlorophyll. Unlike chlorophyll, protochlorophyllide is highly fluorescent; mutants that accumulate it glow in red if irradiated by the blue lightIn Angiosperms, the last step, conversion of protochlorophyllide to chlorophyll, is light - dependent and such plants are pale (etiolated) if grown in the darkness. Gymnosperms, algae, and photosynthetic bacteria additionally have another, light - independent enzyme and grow green in the darkness as well. The enzyme that converts protochlorophyllide to chlorophyll is protochlorophyllide reductase , EC 1.3.1.33. There are two structurally unrelated proteins with this activity: the light - dependent and the dark - operative. The light dependent reductase needs light to operate. The dark - operative version is a completely different protein, consisting of three subunits that exhibit significant sequence similarity to the three subunits of nitrogenase, which catalyzes the formation of ammonia from dinitrogen. This enzyme might be evolutionary older but (being similar to nitrogenase) is highly sensitive to free oxygen and does not work if its concentration exceeds about 3 \\%. Hence the alternative, light dependent version needed to evolve
Coproporphyrinogen III
Coproporphyrinogen III is a porphyrin metabolite arising from heme synthesis. Porphyrins are pigments found in both animal and plant life. Coproporphyrinogen III is a tetrapyrrole dead-end product resulting from the spontaneous oxidation of the methylene bridges of coproporphyrinogen arising from heme synthesis. It is secreted in feces and urine. Coproporphyrinogen III is biosynthesized from the tetrapyrrole hydroxymethylbilane, which is converted by the action of uroporphyrinogen III synthase to uroporphyrinogen III. Uroporphyrinogen III is subsequently converted into coproporphyrinogen III through a series of four decarboxylations. Increased levels of coproporphyrinogens can indicate congenital erythropoietic porphyria or sideroblastic anemia, which are inherited disorders. Porphyria is a pathological state characterized by abnormalities of porphyrin metabolism and results in the excretion of large quantities of porphyrins in the urine and in extreme sensitivity to light. A large number of factors are capable of increasing porphyrin excretion, owing to different and multiple causes and etiologies: (1) the main site of the chronic hepatic porphyria disease process concentrates on the liver, (2) a functional and morphologic liver injury is almost regularly associated with this chronic porphyria, and (3) the toxic form due to occupational and environmental exposure takes mainly a subclinical course. Hepatic factors include disturbance in coproporphyrinogen metabolism, which results from inhibition of coproporphyrinogen oxidase as well as from the rapid loss and diminished utilization of coproporphyrinogen in the hepatocytes. This may also explain why coproporphyrin, its autoxidation product, predominates physiologically in the urine. Decreased biliary excretion of coproporphyrin leading to a compensatory urinary excretion. Therefore, the coproporphyrin ring isomer ratio (1:III) becomes a sensitive index for impaired liver function, intrahepatic cholestasis, and disturbed activity of hepatic uroporphyrinogen decarboxylase. In itself, secondary coproporphyrinuria is not associated with porphyria symptoms of a hepatologic-gastroenterologic, neurologic, or dermatologic order, even though coproporphyrinuria can occur with such symptoms (PMID: 3327428). Under certain conditions, coproporphyrinogen III can act as a phototoxin, a neurotoxin, and a metabotoxin. A phototoxin leads to cell damage upon exposure to light. A neurotoxin causes damage to nerve cells and nerve tissues. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of porphyrins are associated with porphyrias such as porphyria variegate, acute intermittent porphyria, hereditary coproporphyria (HCP), congenital erythropoietic porphyria, and sideroblastic anemia. In particular, coproporphyrinogen III is accumulated and excreted excessively in the feces in acute intermittent porphyria, protoporphyria, and variegate porphyria. There are several types of porphyrias (most are inherited). Hepatic porphyrias are characterized by acute neurological attacks (seizures, psychosis, extreme back and abdominal pain, and an acute polyneuropathy), while the erythropoietic forms present with skin problems (usually a light-sensitive blistering rash and increased hair growth). The neurotoxicity of porphyrins may be due to their selective interactions with tubulin, which disrupt microtubule formation and cause neural malformations (PMID: 3441503). Coproporphyrinogen III oxidase is deficient in hereditary coproporphyria. These persons usually have enhanced excretion even in a subclinical state of the disease.(PubMed ID 14605502 ) [HMDB]. Coproporphyrinogen III is found in many foods, some of which are cucumber, climbing bean, horseradish, and pepper (c. frutescens). COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
Pentaporphyrin I
Pentaporphyrin I is a porphyrin intermediate detected in liver, kidney and erythrocytes (PubMed ID 8803328 ).
Uroporphyrinogen I
Uroporphyrinogens are porphyrinogen variants in which each pyrrole ring has one acetate side chain and one propionate side chain; it is formed by condensation 4 four molecules of porphobilinogen. 4 isomers are possible but only 2 commoly are found, types I and III. Uroporphyrinogen III is a functional intermediate in heme biosynthesis while Uroporphyrinogen I is produced in an abortive side reaction. [HMDB]. Uroporphyrinogen I is found in many foods, some of which are great horned owl, nutmeg, lime, and cascade huckleberry. Uroporphyrinogens are porphyrinogen variants in which each pyrrole ring has one acetate side chain and one propionate side chain; it is formed by condensation 4 four molecules of porphobilinogen. 4 isomers are possible but only 2 commoly are found, types I and III. Uroporphyrinogen III is a functional intermediate in heme biosynthesis while Uroporphyrinogen I is produced in an abortive side reaction.
Uroporphyrin I
Uroporphyrin is the porphyrin produced by oxidation of the methylene bridges in uroporphyrinogen. Uroporphyrins have four acetic acid and four propionic acid side chains attached to their pyrrole rings. The enzyme uroporphyrinogen I synthase catalyzes the formation of hydroxymethylbilane from four molecules of porphobilinogen. Uroporphyrinogen III cosynthase then catalyzes the conversion of hydroxymethylbilane into uroporphyrinogen III. Otherwise, hydroxymethylbilane cyclizes nonenzymatically to form uroporphyrinogen I. Uroporphyrinogen I and III yield their respective uroporphyrins via autooxidation or their respective coproporphyrinogens via decarboxylation. Excessive amounts of uroporphyrin I are excreted in congenital erythropoietic porphyria, and both uroporphyrin I and uroporphyrin III are excreted in porphyria cutanea tarda. Uroporphyrin I and III are the most common isomers. Under certain conditions, uroporphyrin I can act as a phototoxin, a neurotoxin, and a metabotoxin. A phototoxin leads to cell damage upon exposure to light. A neurotoxin causes damage to nerve cells and nerve tissues. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of porphyrins are associated with porphyrias such as porphyria variegate, acute intermittent porphyria, porphyria cutanea tarda, and hereditary coproporphyria (HCP). There are several types of porphyrias (most are inherited). Hepatic porphyrias are characterized by acute neurological attacks (seizures, psychosis, extreme back and abdominal pain, and an acute polyneuropathy), while the erythropoietic forms present with skin problems (usually a light-sensitive blistering rash and increased hair growth). The neurotoxicity of porphyrins may be due to their selective interactions with tubulin, which disrupt microtubule formation and cause neural malformations (PMID: 3441503). Uroporphyrin is the porphyrin produced by oxidation of the methylene bridges in uroporphyrinogen. They have four acetic acid and four propionic acid side chains attached to the pyrrole rings. Uroporphyrinogen I and III are formed from polypyrryl methane in the presence of uroporphyrinogen III cosynthetase and uroporphyrin I synthetase, respectively. They can yield uroporphyrins by autooxidation or coproporphyrinogens by decarboxylation.Excessive amounts of uroporphyrin I are excreted in congenital erythropoietic porphyria, and both types I and III are excreted in porphyria cutanea tarda.Uroporphyrin I and III are the most common isomers. [HMDB]
Coproporphyrin I
Coproporphyrin I is a porphyrin metabolite arising from heme synthesis. Porphyrins are pigments found in both animal and plant life. Coproporphyrin I is a tetrapyrrole dead-end product from the spontaneous oxidation of the methylene bridges of coproporphynogen, arising from heme synthesis and secreted in feces and urine. Increased levels of coproporphyrins can indicate congenital erythropoietic porphyria or sideroblastic anaemia. Porphyria is a pathological state characterised by abnormalities of porphyrin metabolism and results in the excretion of large quantities of porphyrins in the urine and in extreme sensitivity to light. A large number of factors are capable of increasing porphyrin excretion, owing to different and multiple causes and etiologies: 1) the main site of the chronic hepatic porphyria disease process concentrates on the liver, 2) a functional and morphologic liver injury is almost regularly associated with this chronic porphyria, 3) the toxic form due to occupational and environmental exposure takes mainly a subclinical course. Hepatic factors includes disturbance in coproporphyrinogen metabolism, which results from inhibition of coproporphyrinogen oxidase as well as from the rapid loss from, and diminished utilization of coproporphyrinogen in the hepatocytes, which may also explain why coproporphyrin, its autoxidation product, predominates physiologically in the urine; decreased biliary excretion of coproporphyrin leading to a compensatory urinary excretion, so that the coproporphyrin ring isomer ratio (1:III) becomes a sensitive index for impaired liver function and intrahepatic cholestasis; and disturbed activity of hepatic uroporphyrinogen decarboxylase. In itself, secondary coproporphyrinuria is not associated with porphyria symptoms of a hepatologic-gastroenterologic, neurologic, or dermatologic order, even though coproporphyrinuria can occur with such symptoms. (PMID: 3327428). Coproporhyrin I is a porphyrin metabolite arising from heme synthesis. Porphyrins are pigments found in both animal and plant life.
Enflurane
Enflurane is only found in individuals that have used or taken this drug. It is an extremely stable inhalation anesthetic that allows rapid adjustments of anesthesia depth with little change in pulse or respiratory rate. [PubChem]Enflurane induces a reduction in junctional conductance by decreasing gap junction channel opening times and increasing gap junction channel closing times. Enflurane also activates calcium dependent ATPase in the sarcoplasmic reticulum by increasing the fluidity of the lipid membrane. It also appears to bind the D subunit of ATP synthase and NADH dehydogenase. Enflurane also binds to and angonizes the GABA receptor, the large conductance Ca2+ activated potassium channel, the glycine receptor, and antagonizes the glutamate receptor receptor. These yield a decreased depolarization and therefore, tissue excitability which results in anesthesia. D002491 - Central Nervous System Agents > D002492 - Central Nervous System Depressants > D000777 - Anesthetics N - Nervous system > N01 - Anesthetics > N01A - Anesthetics, general > N01AB - Halogenated hydrocarbons C78272 - Agent Affecting Nervous System > C245 - Anesthetic Agent
precorrin-2
The second intermediate in the biosynthesis of vitamin B12 from uroporphyrinogen III, in which methyl groups have been introduced at positions 2 and 7 of the tetrapyrrole framework.
Lynestrenol
G - Genito urinary system and sex hormones > G03 - Sex hormones and modulators of the genital system > G03A - Hormonal contraceptives for systemic use > G03AC - Progestogens G - Genito urinary system and sex hormones > G03 - Sex hormones and modulators of the genital system > G03D - Progestogens > G03DC - Estren derivatives C147908 - Hormone Therapy Agent > C548 - Therapeutic Hormone > C1636 - Therapeutic Steroid Hormone D012102 - Reproductive Control Agents > D003270 - Contraceptive Agents Same as: D01580
2,4-Pentanedione
2,4-Pentanedione is found in papaya. 2,4-Pentanedione is isolated from ethereal oil of Pinus sylvestris (Scotch pine Isolated from ethereal oil of Pinus sylvestris (Scotch pine). 2,4-Pentanedione is found in papaya.
Beryllium
Beryllium is a light-weight metallic element, which was first recognized as a lung hazard in Europe in the 1930s, shortly after its first production in modern industry. People exposed to beryllium compounds are at increased risk of developing beryllium sensitization and chronic beryllium disease (CBD). The chronic lung disease was first described among workers exposed to beryllium-containing materials used in the manufacture of fluorescent lamps. In primary production of beryllium metal, which was used in nuclear weapons components, physicians recognized severe dermatitis, reversible pneumonitis, and chronic granulomatous lung disease. Physiologically, this metal/element exists as an ion in the body. It is now recognized that the physicochemical properties of beryllium compounds may account for the differing clinical presentations in different industries. In primary production of beryllium metal, soluble salts are present and cause rashes in approximately one fourth of exposed workers and reversible acute pneumonitis in a smaller portion of the workforce. After heavy inhalation exposures, radiographic abnormalities evolve at approximately three weeks; resolution of symptoms and radiologic abnormalities away from exposure occur only after months, but symptoms recur immediately upon reexposure. The granulomatous nature of chronic beryllium disease is now known to be caused by cell-mediated sensitization to beryllium. Chronic beryllium disease (CBD) is a granulomatous lung disorder characterized by the accumulation of beryllium-specific CD4(+) T cells. Depending on genetic susceptibility and the nature of the exposure, CBD occurs in up to 20\\% of exposed workers. Genetic susceptibility has been associated with particular HLA-DP alleles, especially those possessing a negatively charged glutamic acid residue at the 69th position of the beta-chain. The mechanism for this association lies in the ability of these HLA-DP molecules to bind and present beryllium to pathogenic CD4(+) T cells. Large numbers of effector memory, beryllium-specific CD4(+) T cells are recruited to the lung of these subjects and secrete Th1-type cytokines upon beryllium recognition. The presence of circulating beryllium-specific CD4(+) T cells directly correlates with the severity of lymphocytic alveolitis. Since 1987, this biomarker of sensitization has enabled medical surveillance of beryllium-exposed workforces. Beryllium lymphocyte proliferation tests have been used to screen workers to detect sensitization, to characterize epidemiologically workplace risks for beryllium sensitization, and to evaluate the effectiveness of interventions intended to prevent sensitization. The most compelling real-world example of genetic testing for susceptibility to a workplace exposure involves those industries that process or fabricate beryllium. Under reasonable assumptions, the longitudinal positive predictive value of the HLA-DPB1-Glu69 marker of susceptibility to beryllium disease is 12\\%. Interpretive challenges further limit the utility of the test and may inadvertently suggest a false sense of safety among workers. Reduction in inhalation exposure to beryllium has not resulted in a concomitant reduction in the occurrence of beryllium sensitization or CBD, suggesting that continued prevalence may be due, in part, to unchecked skin exposure to beryllium-containing particles. (PMID: 17094767, 16697706, 16231190) [HMDB]. Beryllium is found in spinach. Beryllium is a light-weight metallic element, which was first recognized as a lung hazard in Europe in the 1930s, shortly after its first production in modern industry. People exposed to beryllium compounds are at increased risk of developing beryllium sensitization and chronic beryllium disease (CBD). The chronic lung disease was first described among workers exposed to beryllium-containing materials used in the manufacture of fluorescent lamps. In primary production of beryllium metal, which was used in nuclear weapons components, physicians recognized severe dermatitis, reversible pneumonitis, and chronic granulomatous lung disease. Physiologically, this metal/element exists as an ion in the body. It is now recognized that the physicochemical properties of beryllium compounds may account for the differing clinical presentations in different industries. In primary production of beryllium metal, soluble salts are present and cause rashes in approximately one fourth of exposed workers and reversible acute pneumonitis in a smaller portion of the workforce. After heavy inhalation exposures, radiographic abnormalities evolve at approximately three weeks; resolution of symptoms and radiologic abnormalities away from exposure occur only after months, but symptoms recur immediately upon reexposure. The granulomatous nature of chronic beryllium disease is now known to be caused by cell-mediated sensitization to beryllium. Chronic beryllium disease (CBD) is a granulomatous lung disorder characterized by the accumulation of beryllium-specific CD4(+) T cells. Depending on genetic susceptibility and the nature of the exposure, CBD occurs in up to 20\\% of exposed workers. Genetic susceptibility has been associated with particular HLA-DP alleles, especially those possessing a negatively charged glutamic acid residue at the 69th position of the beta-chain. The mechanism for this association lies in the ability of these HLA-DP molecules to bind and present beryllium to pathogenic CD4(+) T cells. Large numbers of effector memory, beryllium-specific CD4(+) T cells are recruited to the lung of these subjects and secrete Th1-type cytokines upon beryllium recognition. The presence of circulating beryllium-specific CD4(+) T cells directly correlates with the severity of lymphocytic alveolitis. Since 1987, this biomarker of sensitization has enabled medical surveillance of beryllium-exposed workforces. Beryllium lymphocyte proliferation tests have been used to screen workers to detect sensitization, to characterize epidemiologically workplace risks for beryllium sensitization, and to evaluate the effectiveness of interventions intended to prevent sensitization. The most compelling real-world example of genetic testing for susceptibility to a workplace exposure involves those industries that process or fabricate beryllium. Under reasonable assumptions, the longitudinal positive predictive value of the HLA-DPB1-Glu69 marker of susceptibility to beryllium disease is 12\\%. Interpretive challenges further limit the utility of the test and may inadvertently suggest a false sense of safety among workers. Reduction in inhalation exposure to beryllium has not resulted in a concomitant reduction in the occurrence of beryllium sensitization or CBD, suggesting that continued prevalence may be due, in part, to unchecked skin exposure to beryllium-containing particles. (PMID: 17094767, 16697706, 16231190).
(±)-Tryptophan
(±)-Tryptophan is a dietary supplement, nutrient.Tryptophan is one of the 20 standard amino acids, as well as an essential amino acid in the human diet. Only the L-stereoisomer of tryptophan is used in structural or enzyme proteins, but the D-stereoisomer is occasionally found in naturally produced peptides (for example, the marine venom peptide contryphan). (Wikipedia Dietary supplement, nutrient DL-Tryptophan is an endogenous metabolite.
5,6,7,8-Tetrahydrofolic acid
Tetrahydrofolate is a soluble coenzyme (vitamin B9) that is synthesized de novo by plants and microorganisms, and absorbed from the diet by animals. It is composed of three distinct parts: a pterin ring, a p-ABA (p-aminobenzoic acid) and a polyglutamate chain with a number of residues varying between 1 and 8. Only the tetra-reduced form of the molecule serves as a coenzyme for C1 transfer reactions. In biological systems, the C1-units exist under various oxidation states and the different tetrahydrofolate derivatives constitute a family of related molecules named indistinctly under the generic term folate. (PMID 16042593)
hypoxanthine
C274 - Antineoplastic Agent > C163758 - Targeted Therapy Agent > C62554 - Poly (ADP-Ribose) Polymerase Inhibitor COVID info from COVID-19 Disease Map C471 - Enzyme Inhibitor Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia.
Chebulinic_acid
2-[(4R,5S,7R,8R,11S,12S,13R,21S)-13,17,18-trihydroxy-2,10,14-trioxo-5,21-bis[(3,4,5-trihydroxybenzoyl)oxy]-7-[(3,4,5-trihydroxybenzoyl)oxymethyl]-3,6,9,15-tetraoxatetracyclo[10.7.1.14,8.016,20]henicosa-1(19),16(20),17-trien-11-yl]acetic acid is a natural product found in Terminalia chebula with data available. See also: Terminalia chebula fruit (part of).
Nandrolone
A - Alimentary tract and metabolism > A14 - Anabolic agents for systemic use > A14A - Anabolic steroids > A14AB - Estren derivatives D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones > D045930 - Anabolic Agents D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones > D000728 - Androgens A 3-oxo Delta(4)-steroid that is estr-4-en-3-one substituted by a beta-hydroxy group at position 17. C147908 - Hormone Therapy Agent > C548 - Therapeutic Hormone > C1636 - Therapeutic Steroid Hormone C147908 - Hormone Therapy Agent > C548 - Therapeutic Hormone > C2360 - Anabolic Steroid S - Sensory organs > S01 - Ophthalmologicals
hypoxanthine
C274 - Antineoplastic Agent > C163758 - Targeted Therapy Agent > C62554 - Poly (ADP-Ribose) Polymerase Inhibitor A purine nucleobase that consists of purine bearing an oxo substituent at position 6. COVID info from COVID-19 Disease Map C471 - Enzyme Inhibitor Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS MS2 deconvoluted using MS2Dec from all ion fragmentation data, MetaboLights identifier MTBLS1040; FDGQSTZJBFJUBT_STSL_0163_Hypoxanthine_0125fmol_180430_S2_LC02_MS02_115; Spectrum acquired as described in Naz et al 2017 PMID 28641411. Preparation and submission to MassBank of North America by Chaleckis R. and Tada I. MS2 deconvoluted using CorrDec from all ion fragmentation data, MetaboLights identifier MTBLS1040; Spectrum acquired as described in Naz et al 2017 PMID 28641411. Preparation and submission to MassBank of North America by Chaleckis R. and Tada I. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia. Hypoxanthine, a purine derivative, is a potential free radical generator and could be used as an indicator of hypoxia.
Aminolevulinic Acid
L - Antineoplastic and immunomodulating agents > L01 - Antineoplastic agents > L01X - Other antineoplastic agents > L01XD - Sensitizers used in photodynamic/radiation therapy D011838 - Radiation-Sensitizing Agents > D017319 - Photosensitizing Agents C1420 - Photosensitizing Agent D003879 - Dermatologic Agents
porphobilinogen
A dicarboxylic acid that is pyrole bearing aminomethyl, carboxymethyl and 2-carboxyethyl substituents at positions 2, 3 and 4 respectively.
Tetrahydrocortisone
D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisone is a stress-induced hormone. Tetrahydrocortisone is also a urinary metabolite of Cortisone derived from the reduction of Cortisone by 5-reductase[1].
phenobarbital
D002491 - Central Nervous System Agents > D002492 - Central Nervous System Depressants > D006993 - Hypnotics and Sedatives D018377 - Neurotransmitter Agents > D018683 - Excitatory Amino Acid Agents > D018691 - Excitatory Amino Acid Antagonists N - Nervous system > N03 - Antiepileptics > N03A - Antiepileptics > N03AA - Barbiturates and derivatives C78272 - Agent Affecting Nervous System > C29756 - Sedative and Hypnotic > C67084 - Barbiturate D065693 - Cytochrome P-450 Enzyme Inducers > D065695 - Cytochrome P-450 CYP2B6 Inducers D065693 - Cytochrome P-450 Enzyme Inducers > D065701 - Cytochrome P-450 CYP3A Inducers D018377 - Neurotransmitter Agents > D018682 - GABA Agents > D018757 - GABA Modulators C78272 - Agent Affecting Nervous System > C264 - Anticonvulsant Agent D002491 - Central Nervous System Agents > D000927 - Anticonvulsants
hydroxyzine
N - Nervous system > N05 - Psycholeptics > N05B - Anxiolytics > N05BB - Diphenylmethane derivatives D018377 - Neurotransmitter Agents > D018494 - Histamine Agents > D006633 - Histamine Antagonists C308 - Immunotherapeutic Agent > C29578 - Histamine-1 Receptor Antagonist D003879 - Dermatologic Agents > D000982 - Antipruritics Hydroxyzine, a benzodiazepine antihistamine agent, acts as an orally active histamine?H1-receptor and serotonin antagonist. Hydroxyzine has anxiolytic effect and can be used for the research of generalised anxiety disorder[1].
2-Amino-4-oxopentanoic acid
A derivative of valeric acid having amino and oxo substituents at the 2- and 4-positions respectively.
Urocortisone
D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisone is a stress-induced hormone. Tetrahydrocortisone is also a urinary metabolite of Cortisone derived from the reduction of Cortisone by 5-reductase[1].
Urocortisol
D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisol is cortisol metabolite. The urinary Tetrahydrocortisol/Tetrahydrocortisone ratio decreases with increasing 11β-hydroxysteroid dehydrogenase (11β-HSD) activity[1][2].
c0264
1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1]. 1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1].
Tetrahydrocortisol
D006730 - Hormones, Hormone Substitutes, and Hormone Antagonists > D006728 - Hormones Tetrahydrocortisol is the most powerful natural angiostatic steroid. It is involved in C21-Steroid hormone metabolism pathway (KEGG). [HMDB] Tetrahydrocortisol is cortisol metabolite. The urinary Tetrahydrocortisol/Tetrahydrocortisone ratio decreases with increasing 11β-hydroxysteroid dehydrogenase (11β-HSD) activity[1][2].
Uroporphyrinogen III
COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Uroporphyrinogen iii, also known as urogen iii, is a member of the class of compounds known as porphyrins. Porphyrins are compounds containing a fundamental skeleton of four pyrrole nuclei united through the alpha-positions by four methine groups to form a macrocyclic structure. Uroporphyrinogen iii is practically insoluble (in water) and a weakly acidic compound (based on its pKa). Uroporphyrinogen iii can be found in a number of food items such as pili nut, rubus (blackberry, raspberry), sunflower, and pecan nut, which makes uroporphyrinogen iii a potential biomarker for the consumption of these food products. Uroporphyrinogen iii can be found primarily in blood. Uroporphyrinogen iii exists in all living species, ranging from bacteria to humans. In humans, uroporphyrinogen iii is involved in the porphyrin metabolism. Uroporphyrinogen iii is also involved in few metabolic disorders, which include acute intermittent porphyria, congenital erythropoietic porphyria (CEP) or gunther disease, hereditary coproporphyria (HCP), and porphyria variegata (PV).
enflurane
D002491 - Central Nervous System Agents > D002492 - Central Nervous System Depressants > D000777 - Anesthetics N - Nervous system > N01 - Anesthetics > N01A - Anesthetics, general > N01AB - Halogenated hydrocarbons C78272 - Agent Affecting Nervous System > C245 - Anesthetic Agent
Protoporphyrin
A cyclic tetrapyrrole that consists of porphyrin bearing four methyl substituents at positions 3, 8, 13 and 17, two vinyl substituents at positions 7 and 12 and two 2-carboxyethyl substituents at positions 2 and 18. The parent of the class of protoporphyrins. D011838 - Radiation-Sensitizing Agents > D017319 - Photosensitizing Agents COVID info from COVID-19 Disease Map C1420 - Photosensitizing Agent D003879 - Dermatologic Agents Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Protoporphyrin IX is the final intermediate in the heme biosynthetic pathway. Protoporphyrin IX is the final intermediate in the heme biosynthetic pathway.
1,2,4-BENZENETRIOL
A benzenetriol carrying hydroxy groups at positions 1, 2 and 4. 1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1]. 1,2,4-Trihydroxybenzene (Hydroxyhydroquinone), a by-product of coffee bean roasting, increases intracellular Ca2+ concentration in rat thymic lymphocytes[1].
coproporphyrinogen III
COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
