ID A5N6T7_CLOK5 Unreviewed; 801 AA.
AC A5N6T7;
DT 10-JUL-2007, integrated into UniProtKB/TrEMBL.
DT 10-JUL-2007, sequence version 1.
DT 27-MAR-2024, entry version 94.
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 Name=metH1 {ECO:0000313|EMBL:EDK33018.1};
GN OrderedLocusNames=CKL_0976 {ECO:0000313|EMBL:EDK33018.1};
OS Clostridium kluyveri (strain ATCC 8527 / DSM 555 / NCIMB 10680).
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Clostridiaceae;
OC Clostridium.
OX NCBI_TaxID=431943 {ECO:0000313|EMBL:EDK33018.1, ECO:0000313|Proteomes:UP000002411};
RN [1] {ECO:0000313|EMBL:EDK33018.1, ECO:0000313|Proteomes:UP000002411}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 8527 / DSM 555 / NCIMB 10680
RC {ECO:0000313|Proteomes:UP000002411};
RX PubMed=18218779; DOI=10.1073/pnas.0711093105;
RA Seedorf H., Fricke W.F., Veith B., Brueggemann H., Liesegang H.,
RA Strittmatter A., Miethke M., Buckel W., Hinderberger J., Li F.,
RA Hagemeier C., Thauer R.K., Gottschalk G.;
RT "The genome of Clostridium kluyveri, a strict anaerobe with unique
RT metabolic features.";
RL Proc. Natl. Acad. Sci. U.S.A. 105:2128-2133(2008).
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}.
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DR EMBL; CP000673; EDK33018.1; -; Genomic_DNA.
DR RefSeq; WP_012101348.1; NC_009706.1.
DR AlphaFoldDB; A5N6T7; -.
DR STRING; 431943.CKL_0976; -.
DR KEGG; ckl:CKL_0976; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_0_2_9; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000002411; 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 CDD; cd02070; corrinoid_protein_B12-BD; 1.
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:UP000002411};
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 3..285
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 314..558
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 585..678
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 680..801
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT REGION 572..592
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 205
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 270
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 271
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
SQ SEQUENCE 801 AA; 87798 MW; C9F79F51DFEF6D92 CRC64;
MNFKNLVDKF NNRFIFFDGA MGTMLQKAGL KLGELPEVLN ITNPEIISGI HRKYLDAGAD
IITTNTFGAN ELKYDSSDYT IEDVISAGVK LAKQEAGDKL VALDIGPIGK IMEPTGNLSF
ESAYKLFKNQ IVIGEKSGAD VVLIETMTDL YEAKAAVLAA KENSNIPIFC TMTFQEDGRT
LMGTDAKTMV FVLEALGVDV LGVNCSLGPK ELQGIVEEIL KYSSIPVMVQ PNAGLPRYDG
ENTIYDISPE DFAENVLTMA QKGIRVLGGC CGTTPEFIRM CRKDLEGLTP LNIEEKHYTA
VCSATDTVIV GEKIKIIGER INPTGRSIYK KELKEGSINY IQKEAIMQKE EGANILGVNV
GLPEINEVEI MKKAIRAVQK VVQLPLSIDS PDPQVLETGI RMYNGKPVIN SVNGSKKSME
EVFPIVKKYG GCVIALTIDE KGIPHTAEGR VKIAEKIIKT ASIYGINKKN IIIDCLTLTV
SAQQKEVLET IKAIKMVTEK FGVKTVLGVS NISFGLPNRS ILNRTFLAMA LQAGLNLPIM
NPADESMKEV IAAFQVLTNI DKEGKEYVIK YGNKSKDEKP KGEGNSPLKN ADNNLKDLKQ
LIIDGIEDEA EAMTTELLKN KKALEIVNSY IIPALDEVGK QYELQDIFLP QLIQSAETVK
KSFEIIKDNM LSSGQKSLEK GTIVLATVKG DIHDIGKNIV KVLLENYGFE VIDLGRDVDI
DNIVNTIRDN NIKLVGLSAL MTTTVASMKK TIEAIRENNL NCKIVVGGAV LNQNYADMIG
ADYYAKDARE AVKIAEEVFL I
//
