ID D1AP89_SEBTE Unreviewed; 791 AA.
AC D1AP89;
DT 19-JAN-2010, integrated into UniProtKB/TrEMBL.
DT 19-JAN-2010, sequence version 1.
DT 27-MAR-2024, entry version 68.
DE RecName: Full=Methionine synthase {ECO:0000256|ARBA:ARBA00013998};
DE EC=2.1.1.13 {ECO:0000256|ARBA:ARBA00012032};
DE AltName: Full=5-methyltetrahydrofolate--homocysteine methyltransferase {ECO:0000256|ARBA:ARBA00031040};
GN OrderedLocusNames=Sterm_3081 {ECO:0000313|EMBL:ACZ09923.1};
OS Sebaldella termitidis (strain ATCC 33386 / NCTC 11300).
OC Bacteria; Fusobacteriota; Fusobacteriia; Fusobacteriales; Leptotrichiaceae;
OC Sebaldella.
OX NCBI_TaxID=526218 {ECO:0000313|EMBL:ACZ09923.1, ECO:0000313|Proteomes:UP000000845};
RN [1] {ECO:0000313|Proteomes:UP000000845}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 33386 / NCTC 11300 {ECO:0000313|Proteomes:UP000000845};
RG US DOE Joint Genome Institute (JGI-PGF);
RA Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA Bruce D., Goodwin L., Pitluck S., Kyrpides N., Mavromatis K., Ivanova N.,
RA Mikhailova N., Sims D., Meincke L., Brettin T., Detter J.C., Han C.,
RA Larimer F., Land M., Hauser L., Markowitz V., Cheng J.F., Hugenholtz P.,
RA Woyke T., Wu D., Eisen J.A.;
RT "The complete chromosome of Sebaldella termitidis ATCC 33386.";
RL Submitted (SEP-2009) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:ACZ09923.1, ECO:0000313|Proteomes:UP000000845}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 33386 / NCTC 11300 {ECO:0000313|Proteomes:UP000000845};
RX PubMed=21304705;
RA Harmon-Smith M., Celia L., Chertkov O., Lapidus A., Copeland A.,
RA Glavina Del Rio T., Nolan M., Lucas S., Tice H., Cheng J.F., Han C.,
RA Detter J.C., Bruce D., Goodwin L., Pitluck S., Pati A., Liolios K.,
RA Ivanova N., Mavromatis K., Mikhailova N., Chen A., Palaniappan K., Land M.,
RA Hauser L., Chang Y.J., Jeffries C.D., Brettin T., Goker M., Beck B.,
RA Bristow J., Eisen J.A., Markowitz V., Hugenholtz P., Kyrpides N.C.,
RA Klenk H.P., Chen F.;
RT "Complete genome sequence of Sebaldella termitidis type strain (NCTC
RT 11300).";
RL Stand. Genomic Sci. 2:220-227(2010).
CC -!- FUNCTION: Catalyzes the transfer of a methyl group from methyl-
CC cobalamin to homocysteine, yielding enzyme-bound cob(I)alamin and
CC methionine. Subsequently, remethylates the cofactor using
CC methyltetrahydrofolate. {ECO:0000256|ARBA:ARBA00025552}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(6S)-5-methyl-5,6,7,8-tetrahydrofolate + L-homocysteine =
CC (6S)-5,6,7,8-tetrahydrofolate + L-methionine; Xref=Rhea:RHEA:11172,
CC ChEBI:CHEBI:18608, ChEBI:CHEBI:57453, ChEBI:CHEBI:57844,
CC ChEBI:CHEBI:58199; EC=2.1.1.13;
CC Evidence={ECO:0000256|ARBA:ARBA00001700};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947,
CC ECO:0000256|PROSITE-ProRule:PRU00333};
CC -!- COFACTOR:
CC Name=methylcob(III)alamin; Xref=ChEBI:CHEBI:28115;
CC Evidence={ECO:0000256|ARBA:ARBA00001956};
CC -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via de novo
CC pathway; L-methionine from L-homocysteine (MetH route): step 1/1.
CC {ECO:0000256|ARBA:ARBA00005178}.
CC -!- SIMILARITY: Belongs to the vitamin-B12 dependent methionine synthase
CC family. {ECO:0000256|ARBA:ARBA00010398}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; CP001739; ACZ09923.1; -; Genomic_DNA.
DR RefSeq; WP_012862505.1; NC_013517.1.
DR AlphaFoldDB; D1AP89; -.
DR STRING; 526218.Sterm_3081; -.
DR KEGG; str:Sterm_3081; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_0_2_0; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000000845; Chromosome.
DR GO; GO:0031419; F:cobalamin binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0008705; F:methionine synthase activity; IEA:UniProtKB-EC.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR GO; GO:0042558; P:pteridine-containing compound metabolic process; IEA:InterPro.
DR Gene3D; 3.40.50.280; Cobalamin-binding domain; 1.
DR Gene3D; 3.20.20.20; Dihydropteroate synthase-like; 1.
DR Gene3D; 3.20.20.330; Homocysteine-binding-like domain; 1.
DR Gene3D; 1.10.1240.10; Methionine synthase domain; 1.
DR InterPro; IPR003759; Cbl-bd_cap.
DR InterPro; IPR006158; Cobalamin-bd.
DR InterPro; IPR036724; Cobalamin-bd_sf.
DR InterPro; IPR011005; Dihydropteroate_synth-like_sf.
DR InterPro; IPR003726; HCY_dom.
DR InterPro; IPR036589; HCY_dom_sf.
DR InterPro; IPR017215; MetH_bac.
DR InterPro; IPR036594; Meth_synthase_dom.
DR InterPro; IPR000489; Pterin-binding_dom.
DR PANTHER; PTHR45833; METHIONINE SYNTHASE; 1.
DR PANTHER; PTHR45833:SF1; METHIONINE SYNTHASE; 1.
DR Pfam; PF02310; B12-binding; 1.
DR Pfam; PF02607; B12-binding_2; 1.
DR Pfam; PF00809; Pterin_bind; 1.
DR Pfam; PF02574; S-methyl_trans; 1.
DR PIRSF; PIRSF037472; DHPS_mtfrase; 1.
DR SMART; SM01018; B12-binding_2; 1.
DR SUPFAM; SSF52242; Cobalamin (vitamin B12)-binding domain; 1.
DR SUPFAM; SSF51717; Dihydropteroate synthetase-like; 1.
DR SUPFAM; SSF82282; Homocysteine S-methyltransferase; 1.
DR SUPFAM; SSF47644; Methionine synthase domain; 1.
DR PROSITE; PS51332; B12_BINDING; 1.
DR PROSITE; PS51337; B12_BINDING_NTER; 1.
DR PROSITE; PS50970; HCY; 1.
DR PROSITE; PS50972; PTERIN_BINDING; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605};
KW Cobalamin {ECO:0000256|ARBA:ARBA00022628};
KW Cobalt {ECO:0000256|ARBA:ARBA00023285};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|PROSITE-
KW ProRule:PRU00333}; Methionine biosynthesis {ECO:0000256|ARBA:ARBA00023167};
KW Methyltransferase {ECO:0000256|ARBA:ARBA00022603, ECO:0000256|PROSITE-
KW ProRule:PRU00333}; Reference proteome {ECO:0000313|Proteomes:UP000000845};
KW S-adenosyl-L-methionine {ECO:0000256|ARBA:ARBA00022691};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|PROSITE-
KW ProRule:PRU00333};
KW Zinc {ECO:0000256|ARBA:ARBA00022833, ECO:0000256|PROSITE-ProRule:PRU00333}.
FT DOMAIN 1..282
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 311..555
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 572..665
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 667..791
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT BINDING 202
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 267
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 268
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
SQ SEQUENCE 791 AA; 87188 MW; EE187DF59B3A6957 CRC64;
MGIREKLGKE ILFFDGAMGT MLQKKGLKLG KMPEDLNIDN PEIIEEIHRL YAKSGADIIT
TNTFGANRLK LEHSSYSQEE IIKSGISIAK KANPDGYVAL DIGPLGQLLE PLGVLPFEEA
YEIFKEQIIL GEKYGADIII IETMVDIYEA KAAILAAKEN SSLPVICTVT FQEDKRMLTG
TSILGAVTIL ESLGVDALGV NCSLGPKELI PIVDELLQYS KTPVIVQPNA GLPKMIGGNT
VFDLSAEEYS SIMEDFVHKG ISIIGGCCGT DERFIKSIHD KLIDFSPVPR KIKPRSIIAT
ATKCVDLDEG IKVIGERINP TGKKKLKEAL INNNMEYILR EAVTQKEKGA DILDVNVGLP
EINESEVITG VVKEIQSIID LPLQIDSSDA GAIEAALRIY NGKAVINSVN GKAEIMDTIF
KIARKYGACV VGLTLDENGI PSSAEERFKI AEKIVNTAEK YGIPKENLLI DCLVLTASAQ
QKEVSETLKA ITMVREKLGV KTVLGVSNVS FGLPDRALLN RTFLTMALHS GLTTPILNPQ
SEEMMHIIKA FNVLTNQDKD SAEYIDFFNN SDTKKEIIKN TDLELPDIIR LGLKEEGKSK
IYSLLKEYQP MYIIDNYLIP VLDTIGIKFE KGEIFLPQLI QTAETVKYFF EILKGEMIKE
KKEFVNKGDI ILATVKGDIH DIGKNIVKIV LENYGYNIID LGKDVPVEKV VNTAKEKNIQ
LIGLSALMTT TVKSMEETIK ALRTSNIKCK VFVGGAVLTQ EYADMIGADF YAEDAQESVR
IADKFFNNTS K
//
