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METE_SYNC1
ID   METE_SYNC1              Reviewed;         758 AA.
AC   Q3A7E2;
DT   26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   22-NOV-2005, sequence version 1.
DT   03-AUG-2022, entry version 98.
DE   RecName: Full=5-methyltetrahydropteroyltriglutamate--homocysteine methyltransferase {ECO:0000255|HAMAP-Rule:MF_00172};
DE            EC=2.1.1.14 {ECO:0000255|HAMAP-Rule:MF_00172};
DE   AltName: Full=Cobalamin-independent methionine synthase {ECO:0000255|HAMAP-Rule:MF_00172};
DE   AltName: Full=Methionine synthase, vitamin-B12 independent isozyme {ECO:0000255|HAMAP-Rule:MF_00172};
GN   Name=metE {ECO:0000255|HAMAP-Rule:MF_00172}; OrderedLocusNames=Pcar_0442;
OS   Syntrophotalea carbinolica (strain DSM 2380 / NBRC 103641 / GraBd1)
OS   (Pelobacter carbinolicus).
OC   Bacteria; Proteobacteria; Deltaproteobacteria; Desulfuromonadales;
OC   Syntrophotaleaceae; Syntrophotalea.
OX   NCBI_TaxID=338963;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 2380 / NBRC 103641 / GraBd1;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Chertkov O., Schmutz J., Larimer F.,
RA   Land M., Kyrpides N., Ivanova N., Richardson P.;
RT   "Complete sequence of Pelobacter carbinolicus DSM 2380.";
RL   Submitted (OCT-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the transfer of a methyl group from 5-
CC       methyltetrahydrofolate to homocysteine resulting in methionine
CC       formation. {ECO:0000255|HAMAP-Rule:MF_00172}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=5-methyltetrahydropteroyltri-L-glutamate + L-homocysteine = L-
CC         methionine + tetrahydropteroyltri-L-glutamate; Xref=Rhea:RHEA:21196,
CC         ChEBI:CHEBI:57844, ChEBI:CHEBI:58140, ChEBI:CHEBI:58199,
CC         ChEBI:CHEBI:58207; EC=2.1.1.14; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00172};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00172};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00172};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via de novo
CC       pathway; L-methionine from L-homocysteine (MetE route): step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_00172}.
CC   -!- SIMILARITY: Belongs to the vitamin-B12 independent methionine synthase
CC       family. {ECO:0000255|HAMAP-Rule:MF_00172}.
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DR   EMBL; CP000142; ABA87702.1; -; Genomic_DNA.
DR   RefSeq; WP_011340124.1; NC_007498.2.
DR   AlphaFoldDB; Q3A7E2; -.
DR   SMR; Q3A7E2; -.
DR   STRING; 338963.Pcar_0442; -.
DR   EnsemblBacteria; ABA87702; ABA87702; Pcar_0442.
DR   KEGG; pca:Pcar_0442; -.
DR   eggNOG; COG0620; Bacteria.
DR   HOGENOM; CLU_013175_0_0_7; -.
DR   OMA; KVMKGML; -.
DR   OrthoDB; 577156at2; -.
DR   UniPathway; UPA00051; UER00082.
DR   Proteomes; UP000002534; Chromosome.
DR   GO; GO:0003871; F:5-methyltetrahydropteroyltriglutamate-homocysteine S-methyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008270; F:zinc ion binding; IEA:InterPro.
DR   GO; GO:0009086; P:methionine biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR   CDD; cd03311; CIMS_C_terminal_like; 1.
DR   Gene3D; 3.20.20.210; -; 2.
DR   HAMAP; MF_00172; Meth_synth; 1.
DR   InterPro; IPR013215; Cbl-indep_Met_Synth_N.
DR   InterPro; IPR006276; Cobalamin-indep_Met_synthase.
DR   InterPro; IPR002629; Met_Synth_C/arc.
DR   InterPro; IPR038071; UROD/MetE-like_sf.
DR   Pfam; PF08267; Meth_synt_1; 1.
DR   Pfam; PF01717; Meth_synt_2; 1.
DR   PIRSF; PIRSF000382; MeTrfase_B12_ind; 1.
DR   SUPFAM; SSF51726; SSF51726; 2.
DR   TIGRFAMs; TIGR01371; met_syn_B12ind; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Metal-binding; Methionine biosynthesis;
KW   Methyltransferase; Reference proteome; Repeat; Transferase; Zinc.
FT   CHAIN           1..758
FT                   /note="5-methyltetrahydropteroyltriglutamate--homocysteine
FT                   methyltransferase"
FT                   /id="PRO_1000071614"
FT   ACT_SITE        696
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         15..18
FT                   /ligand="5-methyltetrahydropteroyltri-L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:58207"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         114
FT                   /ligand="5-methyltetrahydropteroyltri-L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:58207"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         433..435
FT                   /ligand="L-homocysteine"
FT                   /ligand_id="ChEBI:CHEBI:58199"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         433..435
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         486
FT                   /ligand="L-homocysteine"
FT                   /ligand_id="ChEBI:CHEBI:58199"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         486
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         517..518
FT                   /ligand="5-methyltetrahydropteroyltri-L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:58207"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         563
FT                   /ligand="5-methyltetrahydropteroyltri-L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:58207"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         601
FT                   /ligand="L-homocysteine"
FT                   /ligand_id="ChEBI:CHEBI:58199"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         601
FT                   /ligand="L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:57844"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         607
FT                   /ligand="5-methyltetrahydropteroyltri-L-glutamate"
FT                   /ligand_id="ChEBI:CHEBI:58207"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         643
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         645
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         667
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
FT   BINDING         728
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00172"
SQ   SEQUENCE   758 AA;  85720 MW;  059EAB3FE0EF7BB7 CRC64;
     MLTHTLGFPR MGAHRELKKN LESYWKGAIG QEKLMASGRE LRLRHWRLQQ QAGIDLVPVG
     DFSYYDHMLD MVAMLGAVPP RFGWQGESVD LDTYFYMARG SSGHRTTTAM EMTKWFDTNY
     HYIVPEFYPG QRFRLARNRL FEELAEACIE GIQAKPVLPG PMTFIALGKE MVAGFDRWSH
     LDAVVEVYEE IVSRVAAKCS WIQLDEPILA TDVPGPIRLR VRDVYRRLAA VAGPCRLMVA
     TYFGALQENL DLALSLPVDG LHVDLVRAPG QLEKVLPCLP ENMVLSLGLI DGRNVWRSNL
     RQAISTAQDA VVARGSDRVM IAPSCSLLHV PVDLAGEAVL DPRIRSWLAF ARQKCQEVNV
     VRLALDGEDV TEVLQANDTA MENRRKSALV HRDAVRRRMA DISPDMYCRR SSFEERKKQQ
     AWLRLPTLPT TTIGSFPQVA GVRSARRSFK QGRISEEQYR AEMQRYIREA IAQQEALGLD
     VLVHGEPERN DMVEYFGEQL AGFCFTENGW VQGYGSRCVK PPIIYGDVER LKPMTMEWTT
     YAQQQTNRPL KGMLTGPVTM LCWSFVRDDQ PRSATCKQIA LAIRDEVQDL EQAGIKIIQV
     DEAALREGLP LRKSAWREYL GWAVDAFRLT ASGVADSTQI HTHMCYSEFN HIAEWIAKMD
     ADVISIEASR SNMELLGVLE SFTYPNDIGP GVYDIHSPRV PSVAEMVELL RKASEVIPLE
     RLWVNPDCGL KTRAWPETLA SLRNMVAAAQ KLRFFARG
 
 
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