ID F5YN83_TREPZ Unreviewed; 1243 AA.
AC F5YN83;
DT 27-JUL-2011, integrated into UniProtKB/TrEMBL.
DT 27-JUL-2011, sequence version 1.
DT 27-MAR-2024, entry version 79.
DE RecName: Full=Methionine synthase {ECO:0000256|ARBA:ARBA00013998, ECO:0000256|PIRNR:PIRNR000381};
DE EC=2.1.1.13 {ECO:0000256|ARBA:ARBA00012032, ECO:0000256|PIRNR:PIRNR000381};
DE AltName: Full=5-methyltetrahydrofolate--homocysteine methyltransferase {ECO:0000256|ARBA:ARBA00031040, ECO:0000256|PIRNR:PIRNR000381};
GN Name=metH {ECO:0000313|EMBL:AEF83900.1};
GN OrderedLocusNames=TREPR_0120 {ECO:0000313|EMBL:AEF83900.1};
OS Treponema primitia (strain ATCC BAA-887 / DSM 12427 / ZAS-2).
OC Bacteria; Spirochaetota; Spirochaetia; Spirochaetales; Treponemataceae;
OC Treponema.
OX NCBI_TaxID=545694 {ECO:0000313|EMBL:AEF83900.1, ECO:0000313|Proteomes:UP000009223};
RN [1] {ECO:0000313|Proteomes:UP000009223}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-887 / DSM 12427 / ZAS-2
RC {ECO:0000313|Proteomes:UP000009223};
RA Tetu S.G., Matson E., Ren Q., Seshadri R., Elbourne L., Hassan K.A.,
RA Durkin A., Radune D., Mohamoud Y., Shay R., Jin S., Zhang X., Lucey K.,
RA Ballor N.R., Ottesen E., Rosenthal R., Allen A., Leadbetter J.R.,
RA Paulsen I.T.;
RT "Complete sequence of Treponema primitia strain ZAS-2.";
RL Submitted (DEC-2009) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:AEF83900.1, ECO:0000313|Proteomes:UP000009223}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-887 / DSM 12427 / ZAS-2
RC {ECO:0000313|Proteomes:UP000009223};
RX PubMed=21326336; DOI=10.1038/ismej.2011.3;
RA Rosenthal A.Z., Matson E.G., Eldar A., Leadbetter J.R.;
RT "RNA-seq reveals cooperative metabolic interactions between two termite-gut
RT spirochete species in co-culture.";
RL ISME J. 5:1133-1142(2011).
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 ECO:0000256|PIRNR:PIRNR000381}.
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 ECO:0000256|PIRNR:PIRNR000381};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947,
CC ECO:0000256|PIRNR:PIRNR000381, ECO:0000256|PROSITE-ProRule:PRU00333};
CC -!- COFACTOR:
CC Name=methylcob(III)alamin; Xref=ChEBI:CHEBI:28115;
CC Evidence={ECO:0000256|ARBA:ARBA00001956,
CC ECO:0000256|PIRNR:PIRNR000381, ECO:0000256|PIRSR:PIRSR000381-1};
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, ECO:0000256|PIRNR:PIRNR000381}.
CC -!- DOMAIN: Modular enzyme with four functionally distinct domains. The
CC isolated Hcy-binding domain catalyzes methyl transfer from free
CC methylcobalamin to homocysteine. The Hcy-binding domain in association
CC with the pterin-binding domain catalyzes the methylation of
CC cob(I)alamin by methyltetrahydrofolate and the methylation of
CC homocysteine. The B12-binding domain binds the cofactor. The AdoMet
CC activation domain binds S-adenosyl-L-methionine. Under aerobic
CC conditions cob(I)alamin can be converted to inactive cob(II)alamin.
CC Reductive methylation by S-adenosyl-L-methionine and flavodoxin
CC regenerates methylcobalamin. {ECO:0000256|PIRNR:PIRNR000381}.
CC -!- SIMILARITY: Belongs to the vitamin-B12 dependent methionine synthase
CC family. {ECO:0000256|ARBA:ARBA00010398}.
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DR EMBL; CP001843; AEF83900.1; -; Genomic_DNA.
DR RefSeq; WP_015706351.1; NC_015578.1.
DR AlphaFoldDB; F5YN83; -.
DR STRING; 545694.TREPR_0120; -.
DR KEGG; tpi:TREPR_0120; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_2_0_12; -.
DR OrthoDB; 9803687at2; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000009223; Chromosome.
DR GO; GO:0031419; F:cobalamin binding; IEA:UniProtKB-UniRule.
DR GO; GO:0008705; F:methionine synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR GO; GO:0042558; P:pteridine-containing compound metabolic process; IEA:InterPro.
DR CDD; cd02069; methionine_synthase_B12_BD; 1.
DR Gene3D; 3.40.50.280; Cobalamin-binding domain; 1.
DR Gene3D; 1.10.288.10; Cobalamin-dependent Methionine Synthase, domain 2; 2.
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 Gene3D; 3.10.196.10; Vitamin B12-dependent methionine synthase, activation domain; 2.
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; IPR033706; Met_synthase_B12-bd.
DR InterPro; IPR011822; MetH.
DR InterPro; IPR036594; Meth_synthase_dom.
DR InterPro; IPR000489; Pterin-binding_dom.
DR InterPro; IPR004223; VitB12-dep_Met_synth_activ_dom.
DR InterPro; IPR037010; VitB12-dep_Met_synth_activ_sf.
DR NCBIfam; TIGR02082; metH; 1.
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; PF02965; Met_synt_B12; 1.
DR Pfam; PF00809; Pterin_bind; 1.
DR Pfam; PF02574; S-methyl_trans; 1.
DR PIRSF; PIRSF000381; MetH; 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; SSF56507; Methionine synthase activation domain-like; 1.
DR SUPFAM; SSF47644; Methionine synthase domain; 1.
DR PROSITE; PS50974; ADOMET_ACTIVATION; 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 ECO:0000256|PIRNR:PIRNR000381};
KW Cobalamin {ECO:0000256|ARBA:ARBA00022628, ECO:0000256|PIRNR:PIRNR000381};
KW Cobalt {ECO:0000256|ARBA:ARBA00023285, ECO:0000256|PIRNR:PIRNR000381};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723,
KW ECO:0000256|PIRNR:PIRNR000381};
KW Methionine biosynthesis {ECO:0000256|ARBA:ARBA00023167,
KW ECO:0000256|PIRNR:PIRNR000381};
KW Methyltransferase {ECO:0000256|ARBA:ARBA00022603,
KW ECO:0000256|PIRNR:PIRNR000381};
KW Reference proteome {ECO:0000313|Proteomes:UP000009223};
KW Repeat {ECO:0000256|ARBA:ARBA00022737};
KW S-adenosyl-L-methionine {ECO:0000256|ARBA:ARBA00022691,
KW ECO:0000256|PIRNR:PIRNR000381};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|PIRNR:PIRNR000381};
KW Zinc {ECO:0000256|ARBA:ARBA00022833, ECO:0000256|PIRNR:PIRNR000381}.
FT DOMAIN 4..322
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 355..615
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 650..744
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 751..886
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT DOMAIN 902..1243
FT /note="AdoMet activation"
FT /evidence="ECO:0000259|PROSITE:PS50974"
FT REGION 1049..1071
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 244
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-1,
FT ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 307
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-1,
FT ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 308
FT /ligand="Zn(2+)"
FT /ligand_id="ChEBI:CHEBI:29105"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-1,
FT ECO:0000256|PROSITE-ProRule:PRU00333"
FT BINDING 694
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 761..765
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 764
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /ligand_part="Co"
FT /ligand_part_id="ChEBI:CHEBI:27638"
FT /note="axial binding residue"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-1"
FT BINDING 809
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 813
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 865
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 949
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 1156
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 1211..1212
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
SQ SEQUENCE 1243 AA; 134229 MW; E1CA8FE623AEED75 CRC64;
MTIREQLTDI ASRRILVLDG AMGTMIQRYK LTETEFRGGK FEDHPTSILG CNDVLCLTKP
DIISSIHEAY LKAGADIIET CSFNATAVSL ADYGLDHLAW EISRASAEIA RKQADKFSTP
GVPRFVAGIL GGAAKSASIS PDMNDPGKRS VTWDELEAAY YDNARGLLDG GVDILMVETI
YDTLNAKAAI FAISRLFEER NIDVPLMISA TVADVSGRIL AGQTLEAFCV SVLHAKPWSM
GLNCSFGAGS LKKHVQELAA LVPCFVSAHP NAGLPNRFGE YDETPETMAA VVEEYLKEGL
VNIIGGCCGS TPDHIAAIAA KAKNYGPRPL PVQAPRKGTV FAGLEPLRVS RDGGLTKIGE
RTNVAGCRKF LKLIKDENYG EALGLVREMI EQGASLINVG MDDPFLDAKA CMTRFLNLAL
ADPDIARLPI VVDSSRWEVI ETGLKLLQGK GLVNSLSLKE GDGELLRKAR LARRYGAAVV
VMLFDEQGQA AGYERKIEIA KRSYDLLTGD GFPPEDIVFD PNILSVATGI PEHDRYALDF
IHACEWITAN CPGAQISGGV TNLSFSFRGN DTVREAMHAV FLKHGIKAGL SMAIVNPGAL
VPYENLESGL RDAVESLLLC KSPDAVDRLL SIAVALKDAG EGQGAGTAAK SASWRSLDVE
ERVVHAMVKG IDDYIEGDVL ELRPRYARPL ELVEGPLMRG MGEVSRLFGE GKMFLPQVIR
SARVMKKAVA VLEPFMERER LASGNTDTAG NEKILLATVK GDVHDIGKNI VGVVLGCNGY
TVLDLGIMVP AEDILAAAEK EGAKIIGLSG LITPSLEEMV RTAREMEKRG MKIPLIIGGA
TTSLAHTALR IAPEYSGPVV YVSDAGQSAG TVRALLAETD RPRFLKDLEQ RYREAAEQHE
RIVAKTELLS LEGARKNRGS QAVSGQAPKS RGLQDLNGYA LERVIPFIDW EGFLRIWELD
REQHSPEKDV AKEKLLEDAR KILDQVRTEK LLQLRGVAGI FPACADGDDV LVYGSGPEPV
RFAFLRNQEK KRAGGANLCL ADFLPSGHSG GGNPGASPRD GNPGVSSGDG NPGVSGGGWL
GLFALSAGFG LEEAAAAFRS RNDDYGALLL GTLADSLAEA FAEEVHLRIR REWWGYGEGE
TLSVEDVFKG KYSGIRPAFG YPPCPDHQDK RIAFDLLEAQ KRCGLTLTES AMIIPAASVC
GMVFSNPEAR YFSAAPVGDD QLQDWAKRKG IKAEEARRRL GRI
//
