METK_RICTY
ID METK_RICTY Reviewed; 382 AA.
AC Q9RL99; Q68VX2;
DT 01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT 09-NOV-2004, sequence version 2.
DT 03-AUG-2022, entry version 129.
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=RT0764;
OS Rickettsia typhi (strain ATCC VR-144 / Wilmington).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC Rickettsiaceae; Rickettsieae; Rickettsia; typhus group.
OX NCBI_TaxID=257363;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC STRAIN=ATCC VR-144 / Wilmington;
RX PubMed=10486973; DOI=10.1093/oxfordjournals.molbev.a026208;
RA Andersson J.O., Andersson S.G.E.;
RT "Genome degradation is an ongoing process in Rickettsia.";
RL Mol. Biol. Evol. 16:1178-1191(1999).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC VR-144 / Wilmington;
RX PubMed=15317790; DOI=10.1128/jb.186.17.5842-5855.2004;
RA McLeod M.P., Qin X., Karpathy S.E., Gioia J., Highlander S.K., Fox G.E.,
RA McNeill T.Z., Jiang H., Muzny D., Jacob L.S., Hawes A.C., Sodergren E.,
RA Gill R., Hume J., Morgan M., Fan G., Amin A.G., Gibbs R.A., Hong C.,
RA Yu X.-J., Walker D.H., Weinstock G.M.;
RT "Complete genome sequence of Rickettsia typhi and comparison with sequences
RT of other Rickettsiae.";
RL J. Bacteriol. 186:5842-5855(2004).
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; AJ238757; CAB56109.1; -; Genomic_DNA.
DR EMBL; AE017197; AAU04220.1; -; Genomic_DNA.
DR RefSeq; WP_011191195.1; NC_006142.1.
DR AlphaFoldDB; Q9RL99; -.
DR SMR; Q9RL99; -.
DR STRING; 257363.RT0764; -.
DR EnsemblBacteria; AAU04220; AAU04220; RT0764.
DR KEGG; rty:RT0764; -.
DR eggNOG; COG0192; Bacteria.
DR HOGENOM; CLU_041802_1_1_5; -.
DR OMA; INPTGRY; -.
DR OrthoDB; 1024388at2; -.
DR UniPathway; UPA00315; UER00080.
DR Proteomes; UP000000604; 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; PS00377; ADOMET_SYNTHASE_2; 1.
PE 3: Inferred from homology;
KW ATP-binding; Cytoplasm; Magnesium; Metal-binding; Nucleotide-binding;
KW One-carbon metabolism; Potassium; Transferase.
FT CHAIN 1..382
FT /note="S-adenosylmethionine synthase"
FT /id="PRO_0000174579"
FT REGION 99..109
FT /note="Flexible loop"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT BINDING 15
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 17
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT BINDING 43
FT /ligand="K(+)"
FT /ligand_id="ChEBI:CHEBI:29103"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00086"
FT BINDING 56
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 99
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 164..166
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 230..231
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 239
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 239
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 245..246
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 266
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 270
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 CONFLICT 121
FT /note="E -> G (in Ref. 1; CAB56109)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 382 AA; 42329 MW; 315652F2AC880061 CRC64;
MENFVFTSES VSEGHPDKIA DQISDAVLDE ILKHDPNGRV ACETFVTTGL VLVGGEITTN
TYVDIEQVVR NKIHEIGYNN PSYGFDGSCC AVISSIVKQS PDIAMGIDNA NEEEIGAGDQ
EMVFGYACNE TKSLMPAPIY YAHLLMKRQA YLRKQNILSW LRPDAKSQVT LRYENNKPIV
IDSVVLSTQH HPEIQQKDLI EAVIEEIIKP TLPTHLLHKD TKYLINPTGR FVIGGPVADC
GLTGRKIIVD SYGGMAKHGG GCFSGKDPTK IDRSAAYMAR YIAKNIVGSG LADRCEIQIS
YAIGVASPVS VYAETFGTSK LSNEQTTKLI TEHFDMRPGK IIKNLKLHTQ CYQKTASYGH
FGREDENFTW EQLDKVDIFK SI
