ID   METAA_AGARV             Reviewed;         310 AA.
AC   C4ZCZ4;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   03-AUG-2022, entry version 68.
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};
GN   OrderedLocusNames=EUBREC_2217;
OS   Agathobacter rectalis (strain ATCC 33656 / DSM 3377 / JCM 17463 / KCTC 5835
OS   / VPI 0990) (Eubacterium rectale).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Lachnospiraceae;
OC   Lachnospiraceae incertae sedis.
OX   NCBI_TaxID=515619;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33656 / DSM 3377 / JCM 17463 / KCTC 5835 / LMG 30912 / VPI
RC   0990;
RX   PubMed=19321416; DOI=10.1073/pnas.0901529106;
RA   Mahowald M.A., Rey F.E., Seedorf H., Turnbaugh P.J., Fulton R.S.,
RA   Wollam A., Shah N., Wang C., Magrini V., Wilson R.K., Cantarel B.L.,
RA   Coutinho P.M., Henrissat B., Crock L.W., Russell A., Verberkmoes N.C.,
RA   Hettich R.L., Gordon J.I.;
RT   "Characterizing a model human gut microbiota composed of members of its two
RT   dominant bacterial phyla.";
RL   Proc. Natl. Acad. Sci. U.S.A. 106:5859-5864(2009).
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}.
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DR   EMBL; CP001107; ACR75957.1; -; Genomic_DNA.
DR   RefSeq; WP_012743052.1; NC_012781.1.
DR   AlphaFoldDB; C4ZCZ4; -.
DR   SMR; C4ZCZ4; -.
DR   STRING; 515619.EUBREC_2217; -.
DR   PRIDE; C4ZCZ4; -.
DR   EnsemblBacteria; ACR75957; ACR75957; EUBREC_2217.
DR   KEGG; ere:EUBREC_2217; -.
DR   HOGENOM; CLU_057851_0_1_9; -.
DR   OMA; WLWFCYQ; -.
DR   OrthoDB; 1601420at2; -.
DR   UniPathway; UPA00051; UER00074.
DR   Proteomes; UP000001477; Chromosome.
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; Reference proteome; Transferase.
FT   CHAIN           1..310
FT                   /note="Homoserine O-acetyltransferase"
FT                   /id="PRO_1000204922"
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   310 AA;  36583 MW;  491D1D9486DFEDF9 CRC64;
     MPIKTQNDLP VKEILERENI FVMDENRASH QNIRQLEIAI VNLMPLKEDT ELQILRSLSN
     TPIQVNVTFV TTSTHEATHT SLSHLNKFYE TFDDIKDRYF DGMIITGAPV ELMEYEEVDY
     WDEICSIMEW SKTHAFSTLH LCWGAQAGLY YHYGIPKRVL PKKKFGVYAH RVKNRKIPLV
     RGFDDVFYAP HSRHTEVLKE DILKHPELTI LAESDDAGVF LLMDQDGKKI FVMGHPEYDR
     YTLHNEYERD KKKGLDIDMP VNYYPDNDDT QKPLLQWRSH GNILYSNWLN YYVYQEVPYE
     FINNREIIGK