ID   OAT_ALKHC               Reviewed;         398 AA.
AC   Q9K5Z2;
DT   16-JAN-2004, integrated into UniProtKB/Swiss-Prot.
DT   05-MAY-2009, sequence version 2.
DT   25-MAY-2022, entry version 127.
DE   RecName: Full=Ornithine aminotransferase {ECO:0000255|HAMAP-Rule:MF_01689};
DE            Short=OAT {ECO:0000255|HAMAP-Rule:MF_01689};
DE            EC=2.6.1.13 {ECO:0000255|HAMAP-Rule:MF_01689};
DE   AltName: Full=Ornithine--oxo-acid aminotransferase {ECO:0000255|HAMAP-Rule:MF_01689};
GN   Name=rocD {ECO:0000255|HAMAP-Rule:MF_01689}; OrderedLocusNames=BH3943;
OS   Alkalihalobacillus halodurans (strain ATCC BAA-125 / DSM 18197 / FERM 7344
OS   / JCM 9153 / C-125) (Bacillus halodurans).
OC   Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Alkalihalobacillus.
OX   NCBI_TaxID=272558;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-125 / DSM 18197 / FERM 7344 / JCM 9153 / C-125;
RX   PubMed=11058132; DOI=10.1093/nar/28.21.4317;
RA   Takami H., Nakasone K., Takaki Y., Maeno G., Sasaki R., Masui N., Fuji F.,
RA   Hirama C., Nakamura Y., Ogasawara N., Kuhara S., Horikoshi K.;
RT   "Complete genome sequence of the alkaliphilic bacterium Bacillus halodurans
RT   and genomic sequence comparison with Bacillus subtilis.";
RL   Nucleic Acids Res. 28:4317-4331(2000).
CC   -!- FUNCTION: Catalyzes the interconversion of ornithine to glutamate
CC       semialdehyde. {ECO:0000255|HAMAP-Rule:MF_01689}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a 2-oxocarboxylate + L-ornithine = an L-alpha-amino acid + L-
CC         glutamate 5-semialdehyde; Xref=Rhea:RHEA:13877, ChEBI:CHEBI:35179,
CC         ChEBI:CHEBI:46911, ChEBI:CHEBI:58066, ChEBI:CHEBI:59869; EC=2.6.1.13;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01689};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01689};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-proline biosynthesis; L-glutamate
CC       5-semialdehyde from L-ornithine: step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_01689}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01689}.
CC   -!- SIMILARITY: Belongs to the class-III pyridoxal-phosphate-dependent
CC       aminotransferase family. OAT subfamily. {ECO:0000255|HAMAP-
CC       Rule:MF_01689}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAB07662.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; BA000004; BAB07662.1; ALT_INIT; Genomic_DNA.
DR   PIR; G84142; G84142.
DR   AlphaFoldDB; Q9K5Z2; -.
DR   SMR; Q9K5Z2; -.
DR   STRING; 272558.10176568; -.
DR   EnsemblBacteria; BAB07662; BAB07662; BAB07662.
DR   KEGG; bha:BH3943; -.
DR   eggNOG; COG4992; Bacteria.
DR   HOGENOM; CLU_016922_10_3_9; -.
DR   OMA; DVFPRFA; -.
DR   UniPathway; UPA00098; UER00358.
DR   Proteomes; UP000001258; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0050155; F:ornithine(lysine) transaminase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004587; F:ornithine-oxo-acid transaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0055129; P:L-proline biosynthetic process; IEA:UniProtKB-UniPathway.
DR   CDD; cd00610; OAT_like; 1.
DR   Gene3D; 3.40.640.10; -; 1.
DR   Gene3D; 3.90.1150.10; -; 1.
DR   HAMAP; MF_01689; Ornith_aminotrans_3; 1.
DR   InterPro; IPR005814; Aminotrans_3.
DR   InterPro; IPR010164; Orn_aminotrans.
DR   InterPro; IPR034757; Ornith_aminotrans_bact.
DR   InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR   InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR   InterPro; IPR015422; PyrdxlP-dep_Trfase_small.
DR   PANTHER; PTHR11986:SF18; PTHR11986:SF18; 1.
DR   Pfam; PF00202; Aminotran_3; 1.
DR   PIRSF; PIRSF000521; Transaminase_4ab_Lys_Orn; 1.
DR   SUPFAM; SSF53383; SSF53383; 1.
DR   TIGRFAMs; TIGR01885; Orn_aminotrans; 1.
DR   PROSITE; PS00600; AA_TRANSFER_CLASS_3; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Aminotransferase; Cytoplasm; Proline biosynthesis;
KW   Pyridoxal phosphate; Reference proteome; Transferase.
FT   CHAIN           1..398
FT                   /note="Ornithine aminotransferase"
FT                   /id="PRO_0000120502"
FT   MOD_RES         256
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01689"
SQ   SEQUENCE   398 AA;  44067 MW;  B63C8F5889943182 CRC64;
     MQSSTSAVIE KTEKYGAKNY HPLPIVISEA KGVWVKDPEG RKYLDMLSAY SAVNQGHCHP
     KIIQALKDQA DKITLTSRAF HNDQLAPFYE KVSKLTGKNM LLPMNTGAEA VETAVKAARR
     WAYDVKGVPD NQAEIIVCED NFHGRTMTAV SLSSNDEYKR GFGPMLPGIK VIPYGDLEAL
     KAAITSHTAA FLVEPIQGEA GIRIPQEGFL KEAYALCKRE NVLFIADEIQ SGLGRSGKWF
     ACDWEDVKPD MYILGKALGG GVFPISVVCA DRDILGVFEP GSHGSTFGGN PLACAVSIAA
     LEVLEEEKLV ERSYEYGNYL LTKLKEIDNP IIKDVRGRGL FIGVELHEPA RKYCEQLKEE
     GLLCKETHET VIRFAPPLVI SKEDLDWAIE KIYYVLKP