ID   SERC_ACIBC              Reviewed;         359 AA.
AC   B2HWW3;
DT   24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-JUN-2008, sequence version 1.
DT   02-SEP-2026, entry version 88.
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=ACICU_02860;
OS   Acinetobacter baumannii (strain ACICU).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Moraxellales; Moraxellaceae; Acinetobacter;
OC   Acinetobacter calcoaceticus/baumannii complex.
OX   NCBI_TaxID=405416;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ACICU;
RX   PubMed=18411315; DOI=10.1128/aac.01643-07;
RA   Iacono M., Villa L., Fortini D., Bordoni R., Imperi F., Bonnal R.J.,
RA   Sicheritz-Ponten T., De Bellis G., Visca P., Cassone A., Carattoli A.;
RT   "Whole-genome pyrosequencing of an epidemic multidrug-resistant
RT   Acinetobacter baumannii strain belonging to the European clone II group.";
RL   Antimicrob. Agents Chemother. 52:2616-2625(2008).
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; CP000863; ACC58172.1; -; Genomic_DNA.
DR   RefSeq; WP_001203182.1; NC_010611.1.
DR   AlphaFoldDB; B2HWW3; -.
DR   SMR; B2HWW3; -.
DR   KEGG; abc:ACICU_02860; -.
DR   HOGENOM; CLU_034866_0_2_6; -.
DR   UniPathway; UPA00135; UER00197.
DR   UniPathway; UPA00244; UER00311.
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; Serine biosynthesis; Transferase.
FT   CHAIN           1..359
FT                   /note="Phosphoserine aminotransferase"
FT                   /id="PRO_1000097200"
FT   BINDING         41
FT                   /ligand="L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:29985"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         75..76
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         101
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         152
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         171
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         194
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   BINDING         236..237
FT                   /ligand="pyridoxal 5'-phosphate"
FT                   /ligand_id="ChEBI:CHEBI:597326"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
FT   MOD_RES         195
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00160"
SQ   SEQUENCE   359 AA;  39339 MW;  3ED422F19885E346 CRC64;
     MRAYNFCAGP AALPTAVLEK AQQELLDWQG KGLSIMEMSH RSADYVAVAE KAEADLRKLM
     NIPENYKVLF LQGGASLQFS AIPLNLLGKN NKADYIHTGI WSEKALKEAK RYGDINVVEA
     GIKVDGKFAI SEQSEWNLSD DAAYVHYADN ETIGGLQFAG VPDVKAPLVC DFSSSILSAP
     LDVSKFGLIY AGAQKNIGPA GLTIVIIRDD LLDQAKAEIP SILKYADQAK NGSMVNTPST
     YAWYLSGLVF EWLLEQGGVD AIHKVNLEKA QLLYGYIDSS DFYNNPIAIP NRSIMNVPFT
     LADEALEKQF LKEAEENHLL NLAGHRSVGG MRASIYNAVP LEGVQALIRF MDDFAKRNG
//