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METK_SACD2
ID   METK_SACD2              Reviewed;         382 AA.
AC   Q21NJ5;
DT   27-JUN-2006, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2006, sequence version 1.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=S-adenosylmethionine synthase {ECO:0000255|HAMAP-Rule:MF_00086};
DE            Short=AdoMet synthase {ECO:0000255|HAMAP-Rule:MF_00086};
DE            EC=2.5.1.6 {ECO:0000255|HAMAP-Rule:MF_00086};
DE   AltName: Full=MAT {ECO:0000255|HAMAP-Rule:MF_00086};
DE   AltName: Full=Methionine adenosyltransferase {ECO:0000255|HAMAP-Rule:MF_00086};
GN   Name=metK {ECO:0000255|HAMAP-Rule:MF_00086}; OrderedLocusNames=Sde_0470;
OS   Saccharophagus degradans (strain 2-40 / ATCC 43961 / DSM 17024).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Saccharophagus.
OX   NCBI_TaxID=203122;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=2-40 / ATCC 43961 / DSM 17024;
RX   PubMed=18516288; DOI=10.1371/journal.pgen.1000087;
RA   Weiner R.M., Taylor L.E. II, Henrissat B., Hauser L., Land M.,
RA   Coutinho P.M., Rancurel C., Saunders E.H., Longmire A.G., Zhang H.,
RA   Bayer E.A., Gilbert H.J., Larimer F., Zhulin I.B., Ekborg N.A., Lamed R.,
RA   Richardson P.M., Borovok I., Hutcheson S.;
RT   "Complete genome sequence of the complex carbohydrate-degrading marine
RT   bacterium, Saccharophagus degradans strain 2-40 T.";
RL   PLoS Genet. 4:E1000087-E1000087(2008).
CC   -!- FUNCTION: Catalyzes the formation of S-adenosylmethionine (AdoMet) from
CC       methionine and ATP. The overall synthetic reaction is composed of two
CC       sequential steps, AdoMet formation and the subsequent tripolyphosphate
CC       hydrolysis which occurs prior to release of AdoMet from the enzyme.
CC       {ECO:0000255|HAMAP-Rule:MF_00086}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + H2O + L-methionine = diphosphate + phosphate + S-
CC         adenosyl-L-methionine; Xref=Rhea:RHEA:21080, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:57844, ChEBI:CHEBI:59789; EC=2.5.1.6;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00086};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00086};
CC       Note=Binds 2 divalent ions per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00086};
CC   -!- COFACTOR:
CC       Name=K(+); Xref=ChEBI:CHEBI:29103;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00086};
CC       Note=Binds 1 potassium ion per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_00086};
CC   -!- PATHWAY: Amino-acid biosynthesis; S-adenosyl-L-methionine biosynthesis;
CC       S-adenosyl-L-methionine from L-methionine: step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_00086}.
CC   -!- SUBUNIT: Homotetramer; dimer of dimers. {ECO:0000255|HAMAP-
CC       Rule:MF_00086}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00086}.
CC   -!- SIMILARITY: Belongs to the AdoMet synthase family. {ECO:0000255|HAMAP-
CC       Rule:MF_00086}.
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DR   EMBL; CP000282; ABD79734.1; -; Genomic_DNA.
DR   RefSeq; WP_011466955.1; NC_007912.1.
DR   AlphaFoldDB; Q21NJ5; -.
DR   SMR; Q21NJ5; -.
DR   STRING; 203122.Sde_0470; -.
DR   EnsemblBacteria; ABD79734; ABD79734; Sde_0470.
DR   KEGG; sde:Sde_0470; -.
DR   eggNOG; COG0192; Bacteria.
DR   HOGENOM; CLU_041802_1_1_6; -.
DR   OMA; MPYLRPD; -.
DR   OrthoDB; 1024388at2; -.
DR   UniPathway; UPA00315; UER00080.
DR   Proteomes; UP000001947; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0004478; F:methionine adenosyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006730; P:one-carbon metabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0006556; P:S-adenosylmethionine biosynthetic process; IEA:UniProtKB-UniPathway.
DR   HAMAP; MF_00086; S_AdoMet_synth1; 1.
DR   InterPro; IPR022631; ADOMET_SYNTHASE_CS.
DR   InterPro; IPR022630; S-AdoMet_synt_C.
DR   InterPro; IPR022629; S-AdoMet_synt_central.
DR   InterPro; IPR022628; S-AdoMet_synt_N.
DR   InterPro; IPR002133; S-AdoMet_synthetase.
DR   InterPro; IPR022636; S-AdoMet_synthetase_sfam.
DR   PANTHER; PTHR11964; PTHR11964; 1.
DR   Pfam; PF02773; S-AdoMet_synt_C; 1.
DR   Pfam; PF02772; S-AdoMet_synt_M; 1.
DR   Pfam; PF00438; S-AdoMet_synt_N; 1.
DR   PIRSF; PIRSF000497; MAT; 1.
DR   SUPFAM; SSF55973; SSF55973; 3.
DR   TIGRFAMs; TIGR01034; metK; 1.
DR   PROSITE; PS00376; ADOMET_SYNTHASE_1; 1.
DR   PROSITE; PS00377; ADOMET_SYNTHASE_2; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Cytoplasm; Magnesium; Metal-binding; Nucleotide-binding;
KW   One-carbon metabolism; Potassium; Reference proteome; Transferase.
FT   CHAIN           1..382
FT                   /note="S-adenosylmethionine synthase"
FT                   /id="PRO_0000241032"
FT   REGION          100..110
FT                   /note="Flexible loop"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         16
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         18
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         44
FT                   /ligand="K(+)"
FT                   /ligand_id="ChEBI:CHEBI:29103"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         57
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         100
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         165..167
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         240
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         240
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         246..247
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         263
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         267
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT   BINDING         271
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /ligand_note="ligand shared between two neighboring
FT                   subunits"
FT                   /note="in other chain"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
SQ   SEQUENCE   382 AA;  41177 MW;  BD612494776953C7 CRC64;
     MAQYSLFTSE SVSEGHPDKM ADQISDAILD AILADDKNAR VAVETMVKTG MAIVAGEVRT
     STYIDLEDLI RDVILDIGYN SSDVGFDGAS CAVLNAIGKQ SADIAMGVDE ANNKDLGAGD
     QGLMFGYATN ETDVLMPAPI YYSHRLVEKQ AELRKNGKLN WLRPDAKSQV TLRYDNGKPV
     AVDAVVLSTQ HNPDVSQATI REAVMEEIIK TTLPAEWLHA DTKYHINPTG QFIIGGPVGD
     CGLTGRKIIV DTYGGMARHG GGAFSGKDPS KVDRSAAYAG RYVAKNIVAA GLASRCEIQV
     SYAIGVAEPT SISVNTFGTG SIADSEISKL VAQHFDLRPR GIIEMLDLLR PIYRKTAAYG
     HFGREEPEFT WEKTDKVAAL QG
 
 
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