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CATH Superfamily 3.40.640.10

Type I PLP-dependent aspartate aminotransferase-like (Major domain)

The name of this superfamily has been modified since the most recent official CATH+ release (v4_4_0). At the point of the last release, this superfamily was named:

"
Type I PLP-dependent aspartate aminotransferase-like (Major domain)
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 82: Phosphoserine aminotransferase

There are 1 EC terms in this cluster

Please note: EC annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

Note: The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.

EC Term Annotations Evidence
Phosphoserine transaminase. [EC: 2.6.1.52]
(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.
  • Catalyzes the second step in the phosphorylated pathway of serine biosynthesis in Escherichia coli.
  • Also catalyzes the third step in the biosynthesis of the coenzyme pyridoxal 5'-phosphate in E.coli (using reaction 2 above).
  • In E.coli, pyridoxal 5'-phosphate is synthesized de novo by a pathway that involves EC 1.2.1.72, EC 1.1.1.290, EC 2.6.1.52, EC 1.1.1.262, EC 2.6.99.2 and EC 1.4.3.5 (with pyridoxine 5'-phosphate as substrate).
  • Pyridoxal phosphate is the cofactor for both activities and therefore seems to be involved in its own biosynthesis.
  • Non-phosphorylated forms of serine and threonine are not substrates.
 9 G2WN57 G2WN57 G2WN57 N1NWQ6 N1NWQ6 N1NWQ6 P33330 P33330 P33330
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