Record Information |
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Version | 2.0 |
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Created at | 2005-11-16 15:48:42 UTC |
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Updated at | 2020-11-24 22:16:45 UTC |
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NP-MRD ID | NP0000595 |
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Secondary Accession Numbers | None |
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Natural Product Identification |
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Common Name | Galactonic acid |
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Description | Galactonic acid is a sugar acid that is a metabolic breakdown product of galactose. Galactose dehydrogenase is responsible for converting galactose to galactonolactone, which then spontaneously or enzymatically converts to galactonic acid. Once formed, galactonic acid may enter the pentose phosphate pathway. Galactonic acid is increased in red blood cells of galactosemic patients, due to a galactose-1-phosphate uridyltransferase (GALT) deficiency (PMID: 14680973 , OMMBID: The Online Metabolic and Molecular Bases of Inherited Disease, Ch.72). When present in sufficiently high levels, galactonic acid can act as an acidogen and a metabotoxin. An acidogen is an acidic compound that induces acidosis, which has multiple adverse effects on many organ systems. A metabotoxin is an endogenously produced metabolite that causes adverse health effects at chronically high levels. Chronically high levels of galactonic acid are associated with at least two inborn errors of metabolism, including galactosemia and galactosemia type II. Galactonic acid is an organic acid. Abnormally high levels of organic acids in the blood (organic acidemia), urine (organic aciduria), the brain, and other tissues lead to general metabolic acidosis. Acidosis typically occurs when arterial pH falls below 7.35. In infants with acidosis, the initial symptoms include poor feeding, vomiting, loss of appetite, weak muscle tone (hypotonia), and lack of energy (lethargy). These can progress to heart abnormalities, liver abnormalities (jaundice), kidney abnormalities, seizures, coma, and possibly death. These are also the characteristic symptoms of untreated galactosemia. Many affected children with organic acidemias experience intellectual disability or delayed development. High levels of galactonic acid in infants are specifically associated with hepatomegaly (an enlarged liver), cirrhosis, renal failure, cataracts, vomiting, seizure, hypoglycemia, lethargy, brain damage, and ovarian failure. |
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Structure | OC[C@@H](O)[C@H](O)[C@H](O)[C@@H](O)C(O)=O InChI=1S/C6H12O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h2-5,7-11H,1H2,(H,12,13)/t2-,3+,4+,5-/m1/s1 |
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Synonyms | Value | Source |
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D-Galactonic acid | Kegg | D-Galactonate | Generator | Galactonate | Generator | Galactonic acid, (D)-isomer | HMDB | Galactonic acid, monopotassium salt | HMDB | Galactonic acid, (L)-isomer | HMDB |
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Chemical Formula | C6H12O7 |
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Average Mass | 196.1553 Da |
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Monoisotopic Mass | 196.05830 Da |
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IUPAC Name | (2R,3S,4S,5R)-2,3,4,5,6-pentahydroxyhexanoic acid |
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Traditional Name | galactonic acid |
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CAS Registry Number | 13382-27-9 |
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SMILES | OC[C@@H](O)[C@H](O)[C@H](O)[C@@H](O)C(O)=O |
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InChI Identifier | InChI=1S/C6H12O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h2-5,7-11H,1H2,(H,12,13)/t2-,3+,4+,5-/m1/s1 |
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InChI Key | RGHNJXZEOKUKBD-MGCNEYSASA-N |
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Experimental Spectra |
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| Spectrum Type | Description | Depositor Email | Depositor Organization | Depositor | Deposition Date | View |
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1D NMR | 1H NMR Spectrum (1D, 600 MHz, H2O, simulated) | Varshavi.d26 | | | 2021-08-17 | View Spectrum | 2D NMR | [1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, 5%_DMSO, experimental) | Wishart Lab | Wishart Lab | David Wishart | 2021-06-20 | View Spectrum |
| Predicted Spectra |
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| Not Available | Chemical Shift Submissions |
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| Not Available | Species |
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Species of Origin | |
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Chemical Taxonomy |
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Description | Belongs to the class of organic compounds known as medium-chain hydroxy acids and derivatives. These are hydroxy acids with a 6 to 12 carbon atoms long side chain. |
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Kingdom | Organic compounds |
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Super Class | Organic acids and derivatives |
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Class | Hydroxy acids and derivatives |
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Sub Class | Medium-chain hydroxy acids and derivatives |
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Direct Parent | Medium-chain hydroxy acids and derivatives |
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Alternative Parents | |
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Substituents | - Medium-chain hydroxy acid
- Medium-chain fatty acid
- Beta-hydroxy acid
- Hydroxy fatty acid
- Alpha-hydroxy acid
- Monosaccharide
- Fatty acyl
- Fatty acid
- Secondary alcohol
- Polyol
- Monocarboxylic acid or derivatives
- Carboxylic acid
- Carboxylic acid derivative
- Organooxygen compound
- Hydrocarbon derivative
- Organic oxide
- Carbonyl group
- Primary alcohol
- Alcohol
- Organic oxygen compound
- Aliphatic acyclic compound
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Molecular Framework | Aliphatic acyclic compounds |
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External Descriptors | |
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Physical Properties |
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State | Solid |
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Experimental Properties | Property | Value | Reference |
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Melting Point | 133 - 136 °C | Not Available | Boiling Point | Not Available | Not Available | Water Solubility | Not Available | Not Available | LogP | Not Available | Not Available |
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Predicted Properties | |
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General References | - Shinka T, Inoue Y, Peng H, Zhen-Wei X, Ose M, Kuhara T: Urine screening of five-day-old newborns: metabolic profiling of neonatal galactosuria. J Chromatogr B Biomed Sci Appl. 1999 Sep 24;732(2):469-77. [PubMed:10517369 ]
- Yager CT, Chen J, Reynolds R, Segal S: Galactitol and galactonate in red blood cells of galactosemic patients. Mol Genet Metab. 2003 Nov;80(3):283-9. [PubMed:14680973 ]
- Tian W, Xiang X, Wang H: Differential Impacts of Water Table and Temperature on Bacterial Communities in Pore Water From a Subalpine Peatland, Central China. Front Microbiol. 2021 May 28;12:649981. doi: 10.3389/fmicb.2021.649981. eCollection 2021. [PubMed:34122363 ]
- Sodeyama T, Nishikawa H, Harai K, Takeshima D, Sawa Y, Maruta T, Ishikawa T: The d-mannose/l-galactose pathway is the dominant ascorbate biosynthetic route in the moss Physcomitrium patens. Plant J. 2021 Sep;107(6):1724-1738. doi: 10.1111/tpj.15413. Epub 2021 Aug 10. [PubMed:34245628 ]
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