phosphoserine transaminase EC#: 2.6.1.52; ChemWhat Code: 1378194
| Product Name | phosphoserine transaminase |
| Example Structure |  |
| Synonyms | 3-O-phospho-L-serine:2-oxoglutarate aminotransferase, 3-phosphoserine aminotransferase, AspAT, AtPSAT, BCIR PSAT, EhPSAT, hydroxypyruvic phosphate-glutamic transaminase, L-phosphoserine aminotransferase, phosphohydroxypyruvate transaminase, phosphohydroxypyruvic-glutamic transaminase, phosphoserine aminotransferase, PSAT, PSAT alpha, PSAT beta, PSAT1, PSerAT, serC, sll1559 |
| EC Number | 2.6.1.52 |
| CAS Registry Number | 9030-90-4 |
| Comments | A pyridoxal 5′-phosphate protein. This enzyme catalyses the second step in the phosphorylated pathway of serine biosynthesis [1,3] and the third step in pyridoxal 5′-phosphate biosynthesis in the bacterium?Escherichia coli?[3]. Pyridoxal 5′-phosphate is the cofactor for both activities and therefore seems to be involved in its own biosynthesis [4]. Non-phosphorylated forms of serine and threonine are not substrates [4]. The archaeal enzyme has a relaxed specificity and can act on?L-cysteate and?L-alanine as alternative substrates to?O-phospho-L-serine [7]. |
| Cofactor | pyridoxal 5′-phosphate |
| History | |
| Reactions | (1) O-phospho-L-serine + 2-oxoglutarate = 3-phosphonooxypyruvate + L-glutamate. (2) 4-phosphonooxy-L-threonine + 2-oxoglutarate = (3R)-3-hydroxy-2-oxo-4- phosphonooxybutanoate + L-glutamate. |
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