ID   SERC_YERPS              Reviewed;         361 AA.
AC   Q66CI9;
DT   16-AUG-2005, integrated into UniProtKB/Swiss-Prot.
DT   11-OCT-2004, sequence version 1.
DT   02-SEP-2026, entry version 118.
DE   RecName: Full=Phosphoserine aminotransferase {ECO:0000255|HAMAP-Rule:MF_00160};
DE            EC=2.6.1.52 {ECO:0000255|HAMAP-Rule:MF_00160};
DE   AltName: Full=Phosphohydroxythreonine aminotransferase {ECO:0000255|HAMAP-Rule:MF_00160};
DE            Short=PSAT {ECO:0000255|HAMAP-Rule:MF_00160};
GN   Name=serC {ECO:0000255|HAMAP-Rule:MF_00160};
GN   OrderedLocusNames=YPTB1414;
OS   Yersinia pseudotuberculosis serotype I (strain IP32953).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Yersiniaceae; Yersinia.
OX   NCBI_TaxID=273123;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=IP32953;
RX   PubMed=15358858; DOI=10.1073/pnas.0404012101;
RA   Chain P.S.G., Carniel E., Larimer F.W., Lamerdin J., Stoutland P.O.,
RA   Regala W.M., Georgescu A.M., Vergez L.M., Land M.L., Motin V.L.,
RA   Brubaker R.R., Fowler J., Hinnebusch J., Marceau M., Medigue C.,
RA   Simonet M., Chenal-Francisque V., Souza B., Dacheux D., Elliott J.M.,
RA   Derbise A., Hauser L.J., Garcia E.;
RT   "Insights into the evolution of Yersinia pestis through whole-genome
RT   comparison with Yersinia pseudotuberculosis.";
RL   Proc. Natl. Acad. Sci. U.S.A. 101:13826-13831(2004).
CC   -!- FUNCTION: Catalyzes the reversible conversion of 3-
CC       phosphohydroxypyruvate to phosphoserine and of 3-hydroxy-2-oxo-4-
CC       phosphonooxybutanoate to phosphohydroxythreonine. {ECO:0000255|HAMAP-
CC       Rule:MF_00160}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=O-phospho-L-serine + 2-oxoglutarate = 3-phosphooxypyruvate +
CC         L-glutamate; Xref=Rhea:RHEA:14329, ChEBI:CHEBI:16810,
CC         ChEBI:CHEBI:18110, ChEBI:CHEBI:29985, ChEBI:CHEBI:57524; EC=2.6.1.52;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00160};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=4-(phosphooxy)-L-threonine + 2-oxoglutarate = (R)-3-hydroxy-2-
CC         oxo-4-phosphooxybutanoate + L-glutamate; Xref=Rhea:RHEA:16573,
CC         ChEBI:CHEBI:16810, ChEBI:CHEBI:29985, ChEBI:CHEBI:58452,
CC         ChEBI:CHEBI:58538; EC=2.6.1.52; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00160};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00160};
CC       Note=Binds 1 pyridoxal phosphate per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00160};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-serine biosynthesis; L-serine from
CC       3-phospho-D-glycerate: step 2/3. {ECO:0000255|HAMAP-Rule:MF_00160}.
CC   -!- PATHWAY: Cofactor biosynthesis; pyridoxine 5'-phosphate biosynthesis;
CC       pyridoxine 5'-phosphate from D-erythrose 4-phosphate: step 3/5.
CC       {ECO:0000255|HAMAP-Rule:MF_00160}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00160}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00160}.
CC   -!- SIMILARITY: Belongs to the class-V pyridoxal-phosphate-dependent
CC       aminotransferase family. SerC subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_00160}.
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DR   EMBL; BX936398; CAH20654.1; -; Genomic_DNA.
DR   RefSeq; WP_011192055.1; NC_006155.1.
DR   AlphaFoldDB; Q66CI9; -.
DR   SMR; Q66CI9; -.
DR   KEGG; ypo:BZ17_1104; -.
DR   KEGG; yps:YPTB1414; -.
DR   PATRIC; fig|273123.14.peg.1171; -.
DR   UniPathway; UPA00135; UER00197.
DR   UniPathway; UPA00244; UER00311.
DR   Proteomes; UP000001011; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004648; F:O-phospho-L-serine:2-oxoglutarate transaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006564; P:L-serine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0008615; P:pyridoxine biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd00611; PSAT_like; 1.
DR   FunFam; 3.40.640.10:FF:000010; Phosphoserine aminotransferase; 1.
DR   FunFam; 3.90.1150.10:FF:000006; Phosphoserine aminotransferase; 1.
DR   Gene3D; 3.90.1150.10; Aspartate Aminotransferase, domain 1; 1.
DR   Gene3D; 3.40.640.10; Type I PLP-dependent aspartate aminotransferase-like (Major domain); 1.
DR   HAMAP; MF_00160; SerC_aminotrans_5; 1.
DR   InterPro; IPR000192; Aminotrans_V_dom.
DR   InterPro; IPR020578; Aminotrans_V_PyrdxlP_BS.
DR   InterPro; IPR022278; Pser_aminoTfrase.
DR   InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR   InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR   InterPro; IPR015422; PyrdxlP-dep_Trfase_small.
DR   NCBIfam; NF003764; PRK05355.1; 1.
DR   NCBIfam; TIGR01364; serC_1; 1.
DR   PANTHER; PTHR43247; PHOSPHOSERINE AMINOTRANSFERASE; 1.
DR   PANTHER; PTHR43247:SF1; PHOSPHOSERINE AMINOTRANSFERASE; 1.
DR   Pfam; PF00266; Aminotran_5; 1.
DR   PIRSF; PIRSF000525; SerC; 1.
DR   SUPFAM; SSF53383; PLP-dependent transferases; 1.
DR   PROSITE; PS00595; AA_TRANSFER_CLASS_5; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Aminotransferase; Cytoplasm; Pyridoxal phosphate;
KW   Pyridoxine biosynthesis; Reference proteome; Serine biosynthesis;
KW   Transferase.
FT   CHAIN           1..361
FT                   /note="Phosphoserine aminotransferase"
FT                   /id="PRO_0000150228"
FT   BINDING         42
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         76..77
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         102
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         153
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         173
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         196
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         238..239
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   MOD_RES         197
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
SQ   SEQUENCE   361 AA;  39991 MW;  4A55EE9512240F38 CRC64;
     MTQVYNFSAG PAMLPVEVLR RAEQELRNWH GLGTSVMEIS HRSKEFMQVA EESEKDLRDL
     LQIPANYKVL FCHGGARAQF AAVPLNLLGD SNSADYIDGG YWAHSAVKEA QKYCTPHVID
     VTTHDNGLTG IQPMKQWKLS DNAAYVHYCP NETIDGVAIN EQPDFGNKVV VADYSSAILS
     RPIDISRYGV IYAGAQKNIG PAGLTLVIVR EDLLGKAHTA LPSILDYKVL ADNDSMFNTP
     PTFAWYLSGL VFKWLKEQGG LGEMEKRNQA KAELLYGAID RTGFYRNQVA IANRSWMNVP
     FQMAEASLDK LFLSEAEAQG LQALKGHRVA GGMRASIYNA MPIEGVKALT DFMADFERRH
     G
//