ID   METAA_BRUME             Reviewed;         306 AA.
AC   Q8YBV5;
DT   05-MAR-2002, integrated into UniProtKB/Swiss-Prot.
DT   05-MAR-2002, sequence version 1.
DT   03-AUG-2022, entry version 110.
DE   RecName: Full=Homoserine O-acetyltransferase {ECO:0000255|HAMAP-Rule:MF_00295};
DE            Short=HAT {ECO:0000255|HAMAP-Rule:MF_00295};
DE            EC=2.3.1.31 {ECO:0000255|HAMAP-Rule:MF_00295};
DE   AltName: Full=Homoserine transacetylase {ECO:0000255|HAMAP-Rule:MF_00295};
DE            Short=HTA {ECO:0000255|HAMAP-Rule:MF_00295};
GN   Name=metAA {ECO:0000255|HAMAP-Rule:MF_00295}; Synonyms=metA;
GN   OrderedLocusNames=BMEII0781;
OS   Brucella melitensis biotype 1 (strain 16M / ATCC 23456 / NCTC 10094).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Brucellaceae; Brucella/Ochrobactrum group; Brucella.
OX   NCBI_TaxID=224914;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=16M / ATCC 23456 / NCTC 10094;
RX   PubMed=11756688; DOI=10.1073/pnas.221575398;
RA   DelVecchio V.G., Kapatral V., Redkar R.J., Patra G., Mujer C., Los T.,
RA   Ivanova N., Anderson I., Bhattacharyya A., Lykidis A., Reznik G.,
RA   Jablonski L., Larsen N., D'Souza M., Bernal A., Mazur M., Goltsman E.,
RA   Selkov E., Elzer P.H., Hagius S., O'Callaghan D., Letesson J.-J.,
RA   Haselkorn R., Kyrpides N.C., Overbeek R.;
RT   "The genome sequence of the facultative intracellular pathogen Brucella
RT   melitensis.";
RL   Proc. Natl. Acad. Sci. U.S.A. 99:443-448(2002).
CC   -!- FUNCTION: Transfers an acetyl group from acetyl-CoA to L-homoserine,
CC       forming acetyl-L-homoserine. {ECO:0000255|HAMAP-Rule:MF_00295}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=acetyl-CoA + L-homoserine = CoA + O-acetyl-L-homoserine;
CC         Xref=Rhea:RHEA:13701, ChEBI:CHEBI:57287, ChEBI:CHEBI:57288,
CC         ChEBI:CHEBI:57476, ChEBI:CHEBI:57716; EC=2.3.1.31;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00295};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via de novo
CC       pathway; O-acetyl-L-homoserine from L-homoserine: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_00295}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00295}.
CC   -!- SIMILARITY: Belongs to the MetA family. {ECO:0000255|HAMAP-
CC       Rule:MF_00295}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=AAL54023.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; AE008918; AAL54023.1; ALT_INIT; Genomic_DNA.
DR   PIR; AD3607; AD3607.
DR   RefSeq; WP_004681844.1; NZ_GG703779.1.
DR   AlphaFoldDB; Q8YBV5; -.
DR   SMR; Q8YBV5; -.
DR   STRING; 224914.BMEII0781; -.
DR   EnsemblBacteria; AAL54023; AAL54023; BMEII0781.
DR   GeneID; 29595358; -.
DR   KEGG; bme:BMEII0781; -.
DR   PATRIC; fig|224914.52.peg.2585; -.
DR   eggNOG; COG1897; Bacteria.
DR   OMA; WLWFCYQ; -.
DR   PhylomeDB; Q8YBV5; -.
DR   UniPathway; UPA00051; UER00074.
DR   Proteomes; UP000000419; Chromosome II.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004414; F:homoserine O-acetyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0008899; F:homoserine O-succinyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019281; P:L-methionine biosynthetic process from homoserine via O-succinyl-L-homoserine and cystathionine; IEA:InterPro.
DR   CDD; cd03131; GATase1_HTS; 1.
DR   Gene3D; 3.40.50.880; -; 1.
DR   HAMAP; MF_00295; MetA_acyltransf; 1.
DR   InterPro; IPR029062; Class_I_gatase-like.
DR   InterPro; IPR005697; HST_MetA.
DR   InterPro; IPR033752; MetA_family.
DR   PANTHER; PTHR20919; PTHR20919; 1.
DR   Pfam; PF04204; HTS; 1.
DR   PIRSF; PIRSF000450; H_ser_succinyltr; 1.
DR   SUPFAM; SSF52317; SSF52317; 1.
DR   TIGRFAMs; TIGR01001; metA; 1.
PE   3: Inferred from homology;
KW   Acyltransferase; Amino-acid biosynthesis; Cytoplasm;
KW   Methionine biosynthesis; Transferase.
FT   CHAIN           1..306
FT                   /note="Homoserine O-acetyltransferase"
FT                   /id="PRO_0000199743"
FT   ACT_SITE        142
FT                   /note="Acyl-thioester intermediate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   ACT_SITE        235
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   ACT_SITE        237
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   BINDING         163
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   BINDING         192
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   BINDING         249
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   SITE            111
FT                   /note="Important for acyl-CoA specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
FT   SITE            192
FT                   /note="Important for substrate specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00295"
SQ   SEQUENCE   306 AA;  35261 MW;  E959C5752DD17E47 CRC64;
     MPIKIPDDLP ATSVLEAEGV MVMREADAVR QDIRPLRIGL LNLMPNKVTT ETQIARLLGA
     TPLQVELTLV RMTNHVARHT PADHMLSFYC PWEEVNDQRF DGFVITGAPV ERLPFEEVTY
     WDEMRRVFDW TQSHVHRTLN ICWAAQAAVY HFHGMKKYDL PAKASGVFRQ RSLVLASPYL
     RGFSDDFAIP VSRWTEVRKS DIPADSGLKV LVDSTETGLC LLDDPRHRSL HMFNHVEYDT
     TSLADEYFRD IQVQPEAKVP VNYFPGDDAK RPPENRWRSH AHLLFGNWIN EMYQSTPYDI
     ERIGKV