Biology:4-phosphoerythronate dehydrogenase
| 4-phosphoerythronate dehydrogenase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 1.1.1.290 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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In enzymology, a 4-phosphoerythronate dehydogenase (EC 1.1.1.290) is an enzyme that catalyzes the chemical reaction
- 4-phospho-D-erythronate + NAD+ [math]\displaystyle{ \rightleftharpoons }[/math] (3R)-3-hydroxy-2-oxo-4-phosphonooxybutanoate + NADH + H+
Thus, the two substrates of this enzyme are 4-phospho-D-erythronate and NAD+, whereas its 3 products are (3R)-3-hydroxy-2-oxo-4-phosphonooxybutanoate, NADH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 4-phospho-D-erythronate:NAD+ 2-oxidoreductase. Other names in common use include PdxB, PdxB 4PE dehydrogenase, and 4-O-phosphoerythronate dehydrogenase. This enzyme participates in vitamin B6 metabolism.
Structural studies
As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 2O4C.
References
- "Metabolic relationships between pyridoxine (vitamin B6) and serine biosynthesis in Escherichia coli K-12". J. Bacteriol. 172 (11): 6518–28. 1990. doi:10.1128/jb.172.11.6518-6528.1990. PMID 2121717.
- "Positive growth rate-dependent regulation of the pdxA, ksgA, and pdxB genes of Escherichia coli K-12". J. Bacteriol. 184 (5): 1359–69. 2002. doi:10.1128/JB.184.5.1359-1369.2002. PMID 11844765.
- "A novel alpha-ketoglutarate reductase activity of the serA-encoded 3-phosphoglycerate dehydrogenase of Escherichia coli K-12 and its possible implications for human 2-hydroxyglutaric aciduria". J. Bacteriol. 178 (1): 232–9. 1996. doi:10.1128/jb.178.1.232-239.1996. PMID 8550422.
- Grant GA (1989). "A new family of 2-hydroxyacid dehydrogenases". Biochem. Biophys. Res. Commun. 165 (3): 1371–4. doi:10.1016/0006-291X(89)92755-1. PMID 2692566.
- "Divergent transcription of pdxB and homology between the pdxB and serA gene products in Escherichia coli K-12". J. Bacteriol. 171 (11): 6084–92. 1989. doi:10.1128/jb.171.11.6084-6092.1989. PMID 2681152.
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