ID A0A075KK43_9FIRM Unreviewed; 793 AA.
AC A0A075KK43;
DT 29-OCT-2014, integrated into UniProtKB/TrEMBL.
DT 29-OCT-2014, sequence version 1.
DT 27-MAR-2024, entry version 34.
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=UFO1_4492 {ECO:0000313|EMBL:AIF54027.1};
OS Pelosinus sp. UFO1.
OC Bacteria; Bacillota; Negativicutes; Selenomonadales; Sporomusaceae;
OC Pelosinus.
OX NCBI_TaxID=484770 {ECO:0000313|EMBL:AIF54027.1, ECO:0000313|Proteomes:UP000027983};
RN [1] {ECO:0000313|EMBL:AIF54027.1, ECO:0000313|Proteomes:UP000027983}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=UFO1 {ECO:0000313|EMBL:AIF54027.1};
RX PubMed=25189589;
RA Brown S.D., Utturkar S.M., Magnuson T.S., Ray A.E., Poole F.L.,
RA Lancaster W.A., Thorgersen M.P., Adams M.W., Elias D.A.;
RT "Complete Genome Sequence of Pelosinus sp. Strain UFO1 Assembled Using
RT Single-Molecule Real-Time DNA Sequencing Technology.";
RL Genome Announc. 2:e00881-14(2014).
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; CP008852; AIF54027.1; -; Genomic_DNA.
DR RefSeq; WP_038674337.1; NZ_CP008852.1.
DR AlphaFoldDB; A0A075KK43; -.
DR STRING; 484770.UFO1_4492; -.
DR KEGG; puf:UFO1_4492; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_0_2_9; -.
DR OrthoDB; 9803687at2; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000027983; 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:UP000027983};
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..276
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 311..576
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 577..671
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 671..793
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT BINDING 196
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 261
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 262
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PROSITE-ProRule:PRU00333"
SQ SEQUENCE 793 AA; 83672 MW; F11DA030BDC68F49 CRC64;
MIYIFDGAMG TMLQNAGLPA GSCPELWNIE QSDVITSIHK SYIDNGADII ETNTFGANRI
KLTHYGLQDK VQALNTAAVK AARAACGPTT KIAGSVGPTG KLISPLGDLA FDSAYDVFYE
QICALDQAGV DMILIETIID IQEMRAALLA AKAASTKPVI CQMSYGADGR TVTGTDPVTA
AIILEAMGAD VIGANCSLGP AQLLPIVEQL AQTTSCPISI QSNAGMPSLI NKQTVFPMGP
EEMGQWAQKL VAAGAQYIGG CCGTTPNHIK AIHEAVSHLS ITPLSTKQQL NKTTALTSRS
KTIYLGANHP TVIIGERINP TGRKQLAADI ASGQFISVKK EALAQIRAGA HILDVNMGVP
GINQAEAMEY VVQELSMLVD APLVIDTTDS KALEAGLKAY PGRALINSIS AEPERLEIFL
PLAKKYGAAI LCLPISPKGV PKTAHERLQV TKQIIHAAFA AGLRPCDFVL DALILTAAAD
AHAGMEALTA LKLYREHLGY PTTMGLSNIS FGLPRRDAIN ATFCAMALDA GLDAPILNPY
DPLMQHTLAA SALLLGHDAN GRSYSMQYAP NKQTEEEEIR NIPKNIIDQI RQAITSGEKE
AVVPLVQQAL DEGISSITIS EQALTAAMNE IGTDFGSGRC FLPQVLLAAE TMRAAFLTIK
KVLPAHESKS LGTIVLATVK GDIHDLGKNI VAALLENNGF TVIDLGKDVT PEAVVEGALK
HKADIVGLCA LMTTTMPQID LTIAALKAGN ASAKTIVGGA VLTQDYAMQA EADAYAENGV
EAVTIAKKLL AIY
//
