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Annotation rule MF_00160
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General rule information [?]

Accession MF_00160
Dates 1-JUN-2001 (Created)
18-NOV-2019 (Last updated, Version 40)
Name SerC_aminotrans_5
Scope
Bacteria
Archaea
Templates P23721 (SERC_ECOLI); Q59196 (SERC_BACCI); P52878 (SERC_METBF); Q9RME2 (SERC_ALKAL); P80862 (SERC_BACSU): [Recover all]
Triggered by

Propagated annotation [?]


Identifier, protein and gene names [?]

Identifier
SERC
Protein name
RecName: Full=Phosphoserine aminotransferase;
EC 2.6.1.52;
AltName: Full=Phosphohydroxythreonine aminotransferase;
Short=PSAT;
Gene name
serC

Comments [?]

Function Catalyzes the reversible conversion of 3-phosphohydroxypyruvate to phosphoserine and of 3-hydroxy-2-oxo-4-phosphonooxybutanoate to phosphohydroxythreonine.
Catalytic activity RHEA:14329: 2-oxoglutarate + O-phospho-L-serine = 3-phosphooxypyruvate + L-glutamate
EC 2.6.1.52
RHEA:16573: 2-oxoglutarate + 4-(phosphooxy)-L-threonine = (R)-3-hydroxy-2-oxo-4-phosphooxybutanoate + L-glutamate
EC 2.6.1.52
Cofactor pyridoxal 5'-phosphate
Note: Binds 1 pyridoxal phosphate per subunit.
Pathway Amino-acid biosynthesis; L-serine biosynthesis; L-serine from 3-phospho-D-glycerate: step 2/3.
case not <OC:Firmicutes>
Pathway Cofactor biosynthesis; pyridoxine 5'-phosphate biosynthesis; pyridoxine 5'-phosphate from D-erythrose 4-phosphate: step 3/5.
end case
Subunit Homodimer.
Subcellular location Cytoplasm.
Similarity Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family. SerC subfamily.

Keywords [?]

Cytoplasm
Amino-acid biosynthesis
Serine biosynthesis
case not <OC:Firmicutes>
Pyridoxine biosynthesis
end case
Transferase
Aminotransferase
Pyridoxal phosphate

Gene Ontology [?]

GO:0004648; Molecular function: O-phospho-L-serine:2-oxoglutarate aminotransferase activity.
GO:0030170; Molecular function: pyridoxal phosphate binding.
GO:0006564; Biological process: L-serine biosynthetic process.
case not <OC:Firmicutes>
GO:0008615; Biological process: pyridoxine biosynthetic process.
end case
GO:0005737; Cellular component: cytoplasm.

Cross-references [?]

Pfam PF00266; Aminotran_5; 1;
TIGRFAMs TIGR01364; SerC_1; 1;
PROSITE PS00595; AA_TRANSFER_CLASS_5; 1;

Features [?]

From: SERC_ECOLI (P23721)
Key     From     To       Description   Tag   Condition   FTGroup
REGION (Optional)     76     77       Pyridoxal phosphate binding     [GA]-[RST]  
REGION (Optional)     239     240       Pyridoxal phosphate binding     N-T  
BINDING (Optional)     9     9       L-glutamate     S  
BINDING (Optional)     42     42       L-glutamate     R  
BINDING     102     102       Pyridoxal phosphate     [WF]  
BINDING     153     153       Pyridoxal phosphate     T  
BINDING (Optional)     174     174       Pyridoxal phosphate     D  
BINDING     197     197       Pyridoxal phosphate     Q  
MOD_RES     198     198       N6-(pyridoxal phosphate)lysine     K  

Additional information [?]

Size range 355-378 amino acids
Related rules None
Fusion None
Comments SerC is not involved in pyridoxine biosynthesis in B.subtilis, and probably also in other Firmicutes. In these organisms, pyridoxal phosphate biosynthesis is achieved by an alternative pathway involving pdxS(yaaD) and pdxT(yaaE). SerC from Mycobacterium species are slightly divergent and could have a different activity.


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