Classification Term: 3816
1,2-diols (ontology term: CHEMONTID:0002467)
Polyols containing an alcohol group at two adjacent positions." []
found 25 associated metabolites at family metabolite taxonomy ontology rank level.
Ancestor: Polyols
Child Taxonomies: There is no child term of current ontology term.
1,4-Dithiothreitol
Dithiothreitol (DTT) is the common name for a small-molecule redox reagent known as Clelands reagent. DTTs formula is C4H10O2S2 and the molecular structure of its reduced form is shown at the right; its oxidized form is a disulfide-bonded 6-membered ring (shown below). Its name derives from the four-carbon sugar, threose. DTT has an epimeric (sister) compound, dithioerythritol. A common use of DTT is as a reducing or "deprotecting" agent for thiolated DNA. The terminal sulfur atoms of thiolated DNA have a tendency to form dimers in solution, especially in the presence of oxygen. Dimerization greatly lowers the efficiency of subsequent coupling reactions such as DNA immobilization on gold in biosensors. Typically DTT is mixed with a DNA solution and allowed to react, and then is removed by filtration (for the solid catalyst) or by chromatography (for the liquid form). The DTT removal procedure is often called "desalting.". DTT is frequently used to reduce the disulfide bonds of proteins and, more generally, to prevent intramolecular and intermolecular disulfide bonds from forming between cysteine residues of proteins. However, even DTT cannot reduce buried (solvent-inaccessible) disulfide bonds, so reduction of disulfide bonds is sometimes carried out under denaturing conditions (e.g., at high temperatures, or in the presence of a strong denaturant such as 6 M guanidinium hydrochloride, 8 M urea, or 1\\% sodium dodecylsulfate). Conversely, the solvent exposure of different disulfide bonds can be assayed by their rate of reduction in the presence of DTT. DTT can also be used as an oxidizing agent. Its principal advantage is that effectively no mixed-disulfide species are populated, in contrast to other agents such as glutathione. In very rare cases, a DTT adduct may be formed, i.e., the two sulfur atoms of DTT may form disulfide bonds to different sulfur atoms; in such cases, DTT cannot cyclize since it has no remaining free thiols. Due to air oxidation, DTT is a relatively unstable compound whose useful life can be extended by refrigeration and handling in an inert atmosphere. Since protonated sulfurs have lowered nucleophilicities, DTT becomes less potent as the pH lowers. Tris(2-carboxyethyl)phosphine HCl (TCEP hydrochloride) is an alternative which is more stable and works even at low pH. Dithiothreitol (DTT) is the common name for a small-molecule redox reagent known as Clelands reagent. DTT has an epimeric compound, dithioerythritol. COVID info from COVID-19 Disease Map Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS
(2R,3R)-2,3-Butanediol
(2R,3R)-2,3-Butanediol is found in cocoa and cocoa products. (2R,3R)-2,3-Butanediol is isolated from cocoa butter and roots of Ruta graveolens (rue).2,3-Butanediol is one of the constitutional isomers of butanediol. The 2R,3R stereoisomer of 2,3-butanediol is produced by a variety of microorganisms, in a process known as butanediol fermentation. It is found in cocoa butter and in the roots of Ruta graveolens. (Wikipedia). (2R,3R)-Butane-2,3-diol is an endogenous metabolite. (2R,3R)-Butane-2,3-diol is an endogenous metabolite. 2,3-Butanediol is a butanediol derived from the bioconversion of natural resources[1]. 2,3-Butanediol is a butanediol derived from the bioconversion of natural resources[1].
Propylene glycol
Propylene glycol (CAS: 57-55-6), also known as 1,2-propanediol, is an organic compound (a diol alcohol), usually a tasteless, odourless, and colourless clear oily liquid that is hygroscopic and miscible with water, acetone, and chloroform. It is manufactured by the hydration of propylene oxide. Propylene glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations It is generally considered safe. However, in large doses, it can be toxic, especially if given over a short period of time. Intravenous lorazepam contains the largest amount of propylene glycol of commonly used drugs. In adults with normal liver and kidney function, the terminal half-life of propylene glycol ranges from 1.4 to 3.3 hours. Propylene glycol is metabolized by the liver to form lactate, acetate, and pyruvate. The nonmetabolized drug is excreted in the urine mainly as the glucuronide conjugate, approximately 12 to 45 percent is excreted unchanged in urine. Renal clearance decreases as the dose administered increases (390 ml/minute/173 m2 at a dose of 5 g/day but only 144 ml/minute/173 m2 at a dose of 21 g/day). These data suggest that renal clearance declines at higher propylene glycol doses because of the saturation of proximal tubular secretion of the drug. As an acceptable level of propylene glycol has not been defined, the clinical implication of a propylene glycol level is unclear. The World Health Organization (WHO) recommends a maximum consumption of 25 mg/kg/day (1.8 g/day for a 75 kg male) of propylene glycol when used as a food additive, but this limit does not address its use as a drug solvent. No maximum dose is recommended in the literature for intravenous therapy with propylene glycol. Intoxication occurs at much higher doses than the WHO dose limit and is exclusive to pharmacologic exposure. Propylene glycol toxicity includes the development of serum hyperosmolality, lactic acidosis, and kidney failure. It has been suggested that proximal tubular necrosis is the cause of acute kidney injury from propylene glycol. Along these lines, proximal tubular cell injury occurs in cultured human cells exposed to propylene glycol. Acute tubular necrosis was described with propylene glycol toxicity in a case of concomitant administration of intravenous lorazepam and trimethoprim sulfamethoxazole. Propylene glycol induced intoxication can also mimic sepsis or systemic inflammatory response syndrome (SIRS). Patients suspected of having sepsis with negative cultures should be evaluated for propylene glycol toxicity if they have been exposed to high dose lorazepam or other medications containing this solvent (PMID:17555487). Propylene glycol is an anticaking agent, antioxidant, dough strengthener, emulsifier, flavouring agent, formulation aid, humectant, solvent, preservative, stabiliser, hog/poultry scald agent, and surface active agent. It is found in foods such as roasted sesame seeds, oats, truffle and other mushrooms. (R)-(-)-1,2-Propanediol is a (R)-enantiomer of 1,2-Propanediol that produced from glucose in Escherichia coli expressing NADH-linked glycerol dehydrogenase genes[1]. (R)-(-)-1,2-Propanediol is a (R)-enantiomer of 1,2-Propanediol that produced from glucose in Escherichia coli expressing NADH-linked glycerol dehydrogenase genes[1].
Rishitin
Constituent of the tubers of white potatoes (Solanum subspecies) infected by Phytophthora infestans. Rishitin is found in many foods, some of which are pepper (c. annuum), yellow bell pepper, red bell pepper, and garden tomato (variety). Rishitin is found in alcoholic beverages. Rishitin is a constituent of the tubers of white potatoes (Solanum species) infected by Phytophthora infestans
Bromobenzene-3,4-dihydrodiol
This compound belongs to the family of Cyclic Alcohols and Derivatives. These are organic compounds containing an aliphatic ring substituted with at least one hydroxyl group.
(S)-Propane-1,2-diol
(S)-Propane-1,2-diol, also known as (S)-1,2-propanediol or (S)-propylene glycol, belongs to the class of organic compounds known as 1,2-diols. These are polyols containing an alcohol group at two adjacent positions. (S)-Propane-1,2-diol is an extremely weak basic (essentially neutral) compound (based on its pKa). (S)-Propane-1,2-diol has been detected, but not quantified in, several different foods, such as common buckwheats, mustard spinach, sugar apples, black crowberries, and bayberries. This could make (S)-propane-1,2-diol a potential biomarker for the consumption of these foods. (S)-Propane-1,2-diol is a clear, colourless, viscous organic solvent and diluent used in pharmaceutical preparations. (S)-(+)-1,2-Propanediol is an endogenous metabolite.
Polyethylene glycol
Polyethylene glycol (PEG) is a polyether compound with many applications from industrial manufacturing to medicine. PEG is also known as polyethylene oxide (PEO) or polyoxyethylene (POE), depending on its molecular weight. PEG, PEO, or POE refers to an oligomer or polymer of ethylene oxide. Polyethylene glycol is produced by the interaction of ethylene oxide with water, ethylene glycol, or ethylene glycol oligomers. PEG is the basis of a number of laxatives (e.g. macrogol-containing products such as Movicol and polyethylene glycol 3350, or SoftLax, MiraLAX, or GlycoLax). Whole bowel irrigation with polyethylene glycol and added electrolytes is used for bowel preparation before surgery or colonoscopy. PEG is used as an excipient in many pharmaceutical products. Lower-molecular-weight variants are used as solvents in oral liquids and soft capsules, whereas solid variants are used as ointment bases, tablet binders, film coatings, and lubricants (Wikipedia). It has been shown that polyethylene glycol can improve healing of spinal injuries in dogs. Earlier findings that polyethylene glycol can aid in nerve repair came from the University of Texas (Krause and Bittner). Polyethylene glycol is commonly used to fuse B-cells with myeloma cells in monoclonal antibody production. PEG has recently been proven to give better results in constipation patients than tegaserod. Since PEG is a flexible, water-soluble polymer, it can be used to create very high osmotic pressures (tens of atmospheres). It also is unlikely to have specific interactions with biological chemicals. These properties make PEG one of the most useful molecules for applying osmotic pressure in biochemistry experiments, particularly when using the osmotic stress technique. Polyethylene glycol has been shown to exhibit excitant, anesthetic, radical scavenger, anti-microbial, and laxative functions (PMID: 10726226, 9485637, 11179847, 19089178, 20011352).
2,3-Butanediol
2,3-Butanediol is an isomer of butanediol. The 2R,3R stereoisomer of 2,3-butanediol is produced by a variety of microorganisms, in a process known as butanediol fermentation. 2,3-Butanediol fermentation is the anaerobic fermentation of glucose with 2,3-butanediol as one of the end products. The overall stoichiometry of the reaction is 2 pyruvate + NADH --> 2CO2 + 2,3-butanediol. Butanediol fermentation is typical for Enterobacter species or microbes found in the gut. 2,3-butanediol has been identified in the sera of alcoholics and it may be a specific marker of alcohol abuse (PMID:6139706). In humans, 2,3-butanediol is oxidized to acetyl-CoA via acetoin. 2,3-Butanediol is also found in cocoa butter. 2,3-Butanediol can also be found in Bacillus, Klebsiella and Serratia (PMID:21272631). 2,3-Butanediol is one of the constitutional isomers of butanediol. The 2R,3R stereoisomer of 2,3-butanediol is produced by a variety of microorganisms, in a process known as butanediol fermentation. It is found in cocoa butter and in the roots of Ruta graveolens. (2R,3R)-Butane-2,3-diol is an endogenous metabolite. (2R,3R)-Butane-2,3-diol is an endogenous metabolite. 2,3-Butanediol is a butanediol derived from the bioconversion of natural resources[1]. 2,3-Butanediol is a butanediol derived from the bioconversion of natural resources[1].
4-Methyl-1,2-dihydroxypentane
4-Methyl-1,2-dihydroxypentane belongs to the family of Secondary Alcohols. These are compounds containing a secondary alcohol functional group, with the general structure HOC(R)(R) (R,R=alkyl, aryl)
Val-glu-pro-ile-pro-tyr
N-[(2R)-6,7-Dihydroxy-3-oxo-1-sulfanylheptan-2-yl]acetamide
Lichenin
Lichenin, also known as lichenan or moss starch, is a complex glucan occurring in certain species of lichens. It can be extracted from Cetraria islandica (Iceland moss). It has been studied since about 1957. Chemically, lichenin consists of repeating glucose units linked by beta-1,3 and beta-1,4 glycosidic bonds . Lichenin is soluble (in water) and a very weakly acidic compound (based on its pKa). Lichenin can be found in oat, which makes lichenin a potential biomarker for the consumption of this food product. Lichenin, also known as lichenan or moss starch, is a complex glucan occurring in certain species of lichens. It can be extracted from Cetraria islandica (Iceland moss). It has been studied since about 1957. Chemically, lichenin consists of repeating glucose units linked by β-1,3 and β-1,4 glycosidic bonds . Lichenin is soluble (in water) and a very weakly acidic compound (based on its pKa). Lichenin can be found in oat, which makes lichenin a potential biomarker for the consumption of this food product.
Risbitin
Risbitin, also known as rishitin, (1s-(1alpha,2beta,3alpha,7beta))-isomer, is a member of the class of compounds known as 1,2-diols. 1,2-diols are polyols containing an alcohol group at two adjacent positions. Risbitin is slightly soluble (in water) and a very weakly acidic compound (based on its pKa). Risbitin can be found in potato, which makes risbitin a potential biomarker for the consumption of this food product.
