ID B6GAW1_9ACTN Unreviewed; 848 AA.
AC B6GAW1;
DT 16-DEC-2008, integrated into UniProtKB/TrEMBL.
DT 16-DEC-2008, sequence version 1.
DT 27-MAR-2024, entry version 52.
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 ORFNames=COLSTE_01211 {ECO:0000313|EMBL:EEA90637.1};
OS Collinsella stercoris DSM 13279.
OC Bacteria; Actinomycetota; Coriobacteriia; Coriobacteriales;
OC Coriobacteriaceae; Collinsella.
OX NCBI_TaxID=445975 {ECO:0000313|EMBL:EEA90637.1, ECO:0000313|Proteomes:UP000003560};
RN [1] {ECO:0000313|EMBL:EEA90637.1, ECO:0000313|Proteomes:UP000003560}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 13279 {ECO:0000313|EMBL:EEA90637.1,
RC ECO:0000313|Proteomes:UP000003560};
RA Sudarsanam P., Ley R., Guruge J., Turnbaugh P.J., Mahowald M., Liep D.,
RA Gordon J.;
RT "Draft genome sequence of Collinsella stercoris (DSM 13279).";
RL Submitted (OCT-2008) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:EEA90637.1, ECO:0000313|Proteomes:UP000003560}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 13279 {ECO:0000313|EMBL:EEA90637.1,
RC ECO:0000313|Proteomes:UP000003560};
RA Fulton L., Clifton S., Fulton B., Xu J., Minx P., Pepin K.H., Johnson M.,
RA Thiruvilangam P., Bhonagiri V., Nash W.E., Mardis E.R., Wilson R.K.;
RL Submitted (OCT-2008) to the EMBL/GenBank/DDBJ databases.
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 -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EEA90637.1}.
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DR EMBL; ABXJ01000068; EEA90637.1; -; Genomic_DNA.
DR RefSeq; WP_006720864.1; NZ_DS995475.1.
DR AlphaFoldDB; B6GAW1; -.
DR STRING; 445975.COLSTE_01211; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_0_2_11; -.
DR OrthoDB; 9803687at2; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000003560; Unassembled WGS sequence.
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:UP000003560};
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..283
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 315..559
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 635..728
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 728..848
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT REGION 586..648
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 621..635
FT /note="Polar residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 203
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"
FT BINDING 269
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
SQ SEQUENCE 848 AA; 88988 MW; D8E7EFC1BCA3CF9A CRC64;
MDTTLQRALA GTGHLLFDGG MGTMLQARGL AAGELPELLC LTHPEQITAI HQAYVQAGSD
VITTNTFGAN RLKLAGRAQV RDVFRAAVAC ARQSGARLVA ADIGPIGALL RPLGTLSFDE
AYDLFAEQAH AAQDAGADLF IIETMTDLLE IKAAVLACRE QTDLPIFATM TFEADGRTFL
GTPPEVAAVT LDALGVDALG INCSQGPAEL RPLARRMLAV TEKPVIVQAN AGLPHVEDGC
TVFDIEPEAY AQAVAGMVED GVGILGGCCG TDPRHVERMA ELLRDHAPAP RTIEAAFTVT
SAQRLVSLPC DASRIAVIGE RINPTGKRLL KEALRSGDYD YVVSQGIAQQ EEGADILDVN
VGLPDIDEVT AIQIAGERLS GAVTLPLQFD STVPTALEAA VRRYAGKPII NSVNGKREVL
DEILPIAARY GANVIGLTLD EEGIPTTAEG RFAIAERIVH AAAEHGIPAT RILIDCLAMT
ASTDQRQAGE TLRAIQMVKR QLGVKCTLGV SNISFGLPQR PLLNSTYLAA ALGAGLDAPI
LNPGSERYMD VVRSYRVLNG EDSGAAGYIE RYATWRDPYT TGAPGAVPVP AAPDAGSTGT
SRSAAAGAPV ADGARAAGSG QATCGPSTGG TGQTGAAGPS HPGDDHGIEH FVLTGRKGEA
ARATRELLST IDPLELIDGH IIPALDEVGA RFDRGTLFLP QLMASAEAAR ASFDVIKEHM
PASDGLSKGT ICVATVKGDI HDIGKNIVKM LLDNYGYHVI DLGRDVDPHV ILKTVQERHI
RLVGLSALMT TTVANMAQTI ELLHREAPGT LVMVGGAVLT PEYAQQIGAD FYAKDAAESA
RIAARVFG
//
