ID   METXA_RHILO             Reviewed;         389 AA.
AC   Q98G09;
DT   23-APR-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2001, sequence version 1.
DT   03-AUG-2022, entry version 105.
DE   RecName: Full=Homoserine O-acetyltransferase {ECO:0000255|HAMAP-Rule:MF_00296};
DE            Short=HAT {ECO:0000255|HAMAP-Rule:MF_00296};
DE            EC=2.3.1.31 {ECO:0000255|HAMAP-Rule:MF_00296};
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}; OrderedLocusNames=mlr3538;
OS   Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099)
OS   (Mesorhizobium loti (strain MAFF 303099)).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Phyllobacteriaceae; Mesorhizobium.
OX   NCBI_TaxID=266835;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=LMG 29417 / CECT 9101 / MAFF 303099;
RX   PubMed=11214968; DOI=10.1093/dnares/7.6.331;
RA   Kaneko T., Nakamura Y., Sato S., Asamizu E., Kato T., Sasamoto S.,
RA   Watanabe A., Idesawa K., Ishikawa A., Kawashima K., Kimura T., Kishida Y.,
RA   Kiyokawa C., Kohara M., Matsumoto M., Matsuno A., Mochizuki Y.,
RA   Nakayama S., Nakazaki N., Shimpo S., Sugimoto M., Takeuchi C., Yamada M.,
RA   Tabata S.;
RT   "Complete genome structure of the nitrogen-fixing symbiotic bacterium
RT   Mesorhizobium loti.";
RL   DNA Res. 7:331-338(2000).
CC   -!- FUNCTION: Transfers an acetyl group from acetyl-CoA to L-homoserine,
CC       forming acetyl-L-homoserine. {ECO:0000255|HAMAP-Rule:MF_00296}.
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   -!- 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; BA000012; BAB50407.1; -; Genomic_DNA.
DR   RefSeq; WP_010911753.1; NC_002678.2.
DR   AlphaFoldDB; Q98G09; -.
DR   SMR; Q98G09; -.
DR   STRING; 266835.14023802; -.
DR   ESTHER; meslo-MLR3538; Homoserine_transacetylase.
DR   PRIDE; Q98G09; -.
DR   EnsemblBacteria; BAB50407; BAB50407; BAB50407.
DR   GeneID; 66681813; -.
DR   KEGG; mlo:mlr3538; -.
DR   eggNOG; COG2021; Bacteria.
DR   HOGENOM; CLU_028760_1_2_5; -.
DR   OMA; TRFCVVS; -.
DR   OrthoDB; 536745at2; -.
DR   UniPathway; UPA00051; UER00074.
DR   Proteomes; UP000000552; Chromosome.
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   3: Inferred from homology;
KW   Acyltransferase; Amino-acid biosynthesis; Cytoplasm;
KW   Methionine biosynthesis; Transferase.
FT   CHAIN           1..389
FT                   /note="Homoserine O-acetyltransferase"
FT                   /id="PRO_0000155741"
FT   DOMAIN          56..366
FT                   /note="AB hydrolase-1"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   REGION          1..21
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        161
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   ACT_SITE        327
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   ACT_SITE        360
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   BINDING         231
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
FT   BINDING         361
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00296"
SQ   SEQUENCE   389 AA;  42364 MW;  0679C21C79C92CA7 CRC64;
     MAALRAGKTN NEADQPSSPV LRFGADKPLK LDAGTLLSPF QIAYQTYGTL NDARSNAILV
     CHALTGDQHV ANTNPVTGKP GWWEVLIGPG RIIDTNRFFV ICSNVIGGCL GSTGPASTNP
     ATGKPYGLDL PVITIRDMVR AQQMLIDHFG IEKLFCVLGG SMGGMQVLEW ASSYPERVFS
     ALPIATGARH SSQNIAFHEV GRQAVMADPD WHGGKYFENG KRPEKGLAVA RMAAHITYLS
     EAALHRKFGR NLQDREALTF GFDADFQIES YLRHQGMTFV DRFDANSYLY MTRSMDYFDL
     AADHGGRLAD AFAGTKTRFC LVSFTSDWLF PTEESRSIVH ALNAAGASVS FVEIETDRGH
     DAFLLDEPEL FAAINGFIGS AARARGLSA