ID   METXA_HALVD             Reviewed;         415 AA.
AC   D4GY94; L9UIA0;
DT   07-JUN-2017, integrated into UniProtKB/Swiss-Prot.
DT   18-MAY-2010, sequence version 1.
DT   03-AUG-2022, entry version 76.
DE   RecName: Full=Homoserine O-acetyltransferase {ECO:0000255|HAMAP-Rule:MF_00296};
DE            Short=HAT {ECO:0000255|HAMAP-Rule:MF_00296, ECO:0000303|PubMed:28581482};
DE            EC=2.3.1.31 {ECO:0000255|HAMAP-Rule:MF_00296, ECO:0000269|PubMed:28581482};
DE   AltName: Full=Homoserine transacetylase {ECO:0000255|HAMAP-Rule:MF_00296};
DE            Short=HTA {ECO:0000255|HAMAP-Rule:MF_00296};
GN   Name=metXA {ECO:0000255|HAMAP-Rule:MF_00296, ECO:0000303|PubMed:28581482};
GN   Synonyms=metX {ECO:0000312|EMBL:ADE04431.1};
GN   OrderedLocusNames=HVO_2998 {ECO:0000312|EMBL:ADE04431.1};
GN   ORFNames=C498_18155 {ECO:0000312|EMBL:ELY24604.1};
OS   Haloferax volcanii (strain ATCC 29605 / DSM 3757 / JCM 8879 / NBRC 14742 /
OS   NCIMB 2012 / VKM B-1768 / DS2) (Halobacterium volcanii).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Haloferacales;
OC   Haloferacaceae; Haloferax.
OX   NCBI_TaxID=309800;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29605 / DSM 3757 / JCM 8879 / NBRC 14742 / NCIMB 2012 / VKM
RC   B-1768 / DS2;
RX   PubMed=20333302; DOI=10.1371/journal.pone.0009605;
RA   Hartman A.L., Norais C., Badger J.H., Delmas S., Haldenby S., Madupu R.,
RA   Robinson J., Khouri H., Ren Q., Lowe T.M., Maupin-Furlow J.,
RA   Pohlschroder M., Daniels C., Pfeiffer F., Allers T., Eisen J.A.;
RT   "The complete genome sequence of Haloferax volcanii DS2, a model
RT   archaeon.";
RL   PLoS ONE 5:E9605-E9605(2010).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29605 / DSM 3757 / JCM 8879 / NBRC 14742 / NCIMB 2012 / VKM
RC   B-1768 / DS2;
RX   PubMed=25393412; DOI=10.1371/journal.pgen.1004784;
RA   Becker E.A., Seitzer P.M., Tritt A., Larsen D., Krusor M., Yao A.I., Wu D.,
RA   Madern D., Eisen J.A., Darling A.E., Facciotti M.T.;
RT   "Phylogenetically driven sequencing of extremely halophilic archaea reveals
RT   strategies for static and dynamic osmo-response.";
RL   PLoS Genet. 10:E1004784-E1004784(2014).
RN   [3]
RP   FUNCTION, AND CATALYTIC ACTIVITY.
RX   PubMed=28581482; DOI=10.1038/nchembio.2397;
RA   Bastard K., Perret A., Mariage A., Bessonnet T., Pinet-Turpault A.,
RA   Petit J.L., Darii E., Bazire P., Vergne-Vaxelaire C., Brewee C., Debard A.,
RA   Pellouin V., Besnard-Gonnet M., Artiguenave F., Medigue C., Vallenet D.,
RA   Danchin A., Zaparucha A., Weissenbach J., Salanoubat M., de Berardinis V.;
RT   "Parallel evolution of non-homologous isofunctional enzymes in methionine
RT   biosynthesis.";
RL   Nat. Chem. Biol. 13:858-866(2017).
CC   -!- FUNCTION: Transfers an acetyl group from acetyl-CoA to L-homoserine,
CC       forming acetyl-L-homoserine. {ECO:0000255|HAMAP-Rule:MF_00296,
CC       ECO:0000269|PubMed:28581482}.
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_00296,
CC         ECO:0000269|PubMed:28581482};
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_00296}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00296}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00296}.
CC   -!- SIMILARITY: Belongs to the AB hydrolase superfamily. MetX family.
CC       {ECO:0000255|HAMAP-Rule:MF_00296}.
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DR   EMBL; CP001956; ADE04431.1; -; Genomic_DNA.
DR   EMBL; AOHU01000104; ELY24604.1; -; Genomic_DNA.
DR   RefSeq; WP_004044906.1; NZ_AOHU01000104.1.
DR   AlphaFoldDB; D4GY94; -.
DR   SMR; D4GY94; -.
DR   STRING; 309800.C498_18155; -.
DR   EnsemblBacteria; ADE04431; ADE04431; HVO_2998.
DR   EnsemblBacteria; ELY24604; ELY24604; C498_18155.
DR   GeneID; 8926491; -.
DR   KEGG; hvo:HVO_2998; -.
DR   PATRIC; fig|309800.29.peg.3529; -.
DR   eggNOG; arCOG00627; Archaea.
DR   HOGENOM; CLU_028760_1_2_2; -.
DR   OMA; TRFCVVS; -.
DR   OrthoDB; 8770at2157; -.
DR   UniPathway; UPA00051; UER00074.
DR   Proteomes; UP000008243; Chromosome.
DR   Proteomes; UP000011532; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004414; F:homoserine O-acetyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009086; P:methionine biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.1820; -; 1.
DR   HAMAP; MF_00296; MetX_acyltransf; 1.
DR   InterPro; IPR029058; AB_hydrolase.
DR   InterPro; IPR000073; AB_hydrolase_1.
DR   InterPro; IPR008220; HAT_MetX-like.
DR   PANTHER; PTHR32268; PTHR32268; 1.
DR   Pfam; PF00561; Abhydrolase_1; 1.
DR   PIRSF; PIRSF000443; Homoser_Ac_trans; 1.
DR   SUPFAM; SSF53474; SSF53474; 1.
DR   TIGRFAMs; TIGR01392; homoserO_Ac_trn; 1.
PE   1: Evidence at protein level;
KW   Acyltransferase; Amino-acid biosynthesis; Cytoplasm;
KW   Methionine biosynthesis; Reference proteome; Transferase.
FT   CHAIN           1..415
FT                   /note="Homoserine O-acetyltransferase"
FT                   /id="PRO_0000440284"
FT   DOMAIN          47..369
FT                   /note="AB hydrolase-1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   REGION          383..415
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        155
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   ACT_SITE        329
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   ACT_SITE        362
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   BINDING         226
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   BINDING         363
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
SQ   SEQUENCE   415 AA;  44794 MW;  1990AB3B82A63B75 CRC64;
     MSRTRTTPGR RVESDVVDIG EHEFESGEIL PDLKVAYEAY GEFDGQNAVL VCHGLTGSQH
     VAGHGTESGV SGQARAWWGD IVGPGKAIDT NDYYVICVNV PGSCYGTSGP ASEGPDGEPW
     GTDFPPVTVH DWTRAQRRLL DHLGVGRLHA VVGGSVGGMN ALDWAVQFPD DVERLAVVAS
     AARLDSQCLG IDAVARRAIT SDPNWNGGDY YGEERPSPDA GLGLARQLGH LMYLSKDSME
     RKFGRRSAGR GERGDAFPSD PAASFFPYRE VESYLDYQAE KFAERFDANA YLYLTRAMDD
     FDLSEGYESD AAALAAFEGE ALLVSFTGDW HFTTEQSESL AGAFRRGDVP VAHHVVESDH
     GHDAFLVEPE KVGPPLADFV DEGVAGRAVT DTAPDGGEPD EDEDFAPVHS SLFSR