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Database: UniProt
Entry: C7MUL0_SACVD
LinkDB: C7MUL0_SACVD
Original site: C7MUL0_SACVD 
ID   C7MUL0_SACVD            Unreviewed;      1184 AA.
AC   C7MUL0;
DT   13-OCT-2009, integrated into UniProtKB/TrEMBL.
DT   13-OCT-2009, sequence version 1.
DT   24-JAN-2024, entry version 102.
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   OrderedLocusNames=Svir_27020 {ECO:0000313|EMBL:ACU97686.1};
OS   Saccharomonospora viridis (strain ATCC 15386 / DSM 43017 / JCM 3036 / NBRC
OS   12207 / P101).
OC   Bacteria; Actinomycetota; Actinomycetes; Pseudonocardiales;
OC   Pseudonocardiaceae; Saccharomonospora.
OX   NCBI_TaxID=471857 {ECO:0000313|EMBL:ACU97686.1, ECO:0000313|Proteomes:UP000000841};
RN   [1] {ECO:0000313|EMBL:ACU97686.1, ECO:0000313|Proteomes:UP000000841}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 15386 / DSM 43017 / JCM 3036 / NBRC 12207 / P101
RC   {ECO:0000313|Proteomes:UP000000841};
RX   PubMed=21304650; DOI=10.4056/sigs.20263;
RA   Pati A., Sikorski J., Nolan M., Lapidus A., Copeland A.,
RA   Glavina Del Rio T., Lucas S., Chen F., Tice H., Pitluck S., Cheng J.F.,
RA   Chertkov O., Brettin T., Han C., Detter J.C., Kuske C., Bruce D.,
RA   Goodwin L., Chain P., D'haeseleer P., Chen A., Palaniappan K., Ivanova N.,
RA   Mavromatis K., Mikhailova N., Rohde M., Tindall B.J., Goker M., Bristow J.,
RA   Eisen J.A., Markowitz V., Hugenholtz P., Kyrpides N.C., Klenk H.P.;
RT   "Complete genome sequence of Saccharomonospora viridis type strain
RT   (P101).";
RL   Stand. Genomic Sci. 1:141-149(2009).
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; CP001683; ACU97686.1; -; Genomic_DNA.
DR   AlphaFoldDB; C7MUL0; -.
DR   STRING; 471857.Svir_27020; -.
DR   KEGG; svi:Svir_27020; -.
DR   eggNOG; COG0646; Bacteria.
DR   eggNOG; COG1410; Bacteria.
DR   HOGENOM; CLU_004914_4_0_11; -.
DR   OMA; ADCIAMS; -.
DR   UniPathway; UPA00051; UER00081.
DR   Proteomes; UP000000841; 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   CDD; cd00740; MeTr; 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   Gene3D; 3.10.196.10; Vitamin B12-dependent methionine synthase, activation 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.
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:UP000000841};
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..306
FT                   /note="Hcy-binding"
FT                   /evidence="ECO:0000259|PROSITE:PS50970"
FT   DOMAIN          337..600
FT                   /note="Pterin-binding"
FT                   /evidence="ECO:0000259|PROSITE:PS50972"
FT   DOMAIN          629..722
FT                   /note="B12-binding N-terminal"
FT                   /evidence="ECO:0000259|PROSITE:PS51337"
FT   DOMAIN          722..859
FT                   /note="B12-binding"
FT                   /evidence="ECO:0000259|PROSITE:PS51332"
FT   DOMAIN          886..1184
FT                   /note="AdoMet activation"
FT                   /evidence="ECO:0000259|PROSITE:PS50974"
FT   REGION          855..902
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        855..900
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         225
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         291
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         292
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         732..736
FT                   /ligand="methylcob(III)alamin"
FT                   /ligand_id="ChEBI:CHEBI:28115"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT   BINDING         735
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         780
FT                   /ligand="methylcob(III)alamin"
FT                   /ligand_id="ChEBI:CHEBI:28115"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT   BINDING         838
FT                   /ligand="methylcob(III)alamin"
FT                   /ligand_id="ChEBI:CHEBI:28115"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT   BINDING         932
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT   BINDING         1127
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT   BINDING         1181..1182
FT                   /ligand="S-adenosyl-L-methionine"
FT                   /ligand_id="ChEBI:CHEBI:59789"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
SQ   SEQUENCE   1184 AA;  130313 MW;  6BDB10084752EE65 CRC64;
     MTMDSRFLTE LDRRVLVADG GMGTALQGFD LTLDDFAQLE GCNEVLNDTR PDVVTAVYRS
     FLEAGSDAIE TNTFGTNYGN FGEYGILDRI RELAEKGTVL ARQCADEYST PDRPRFVLGS
     MGPGTKLPTL GHAPYAVLRD AYVENALGML DGGVDAVLVE TSQDLLQAKA AIVGAKRAMA
     RAGRRVPIIA QVTVEQTGTM LVGSEIGAAL TALEPLGIDL IGMNCATGPA EMSEHLRVLS
     EHARVPISVM PNAGLPELGP DGAVYPLRPD ELAEALATFV TEFGVRLVGG CCGTTPEHVR
     AVVEAVSSLR PKERRPEHTP AVSSVYQSVP FKQDASILNV GERTNANGSK AFRQAMLEGR
     YDDCVEIAKA QTREGAHVLD LCVDYVGRDG TTDMAELASR LATASTLPIM VDSTEPEVVR
     TGLEHFGGRC AINSVNYEDG TGPDSRYRRV LELAVEHGAA VVVTCIDEEG QARTAEWKLR
     VAERAISDLT TNWGLDKSSI IIDCLVFPIT TGQEEVRKDA LETINAIRQL KRRHPDVMTT
     LGLSNVSFGL NPAARQVLNS VFLHECREAG LDSAILNSSK ILPMNKIEDE PRQVALDLVY
     DRRRDGYDPL QRLMQLFEGK TASSARASRA EELAKLPLFE RLEKRIVEGE TTGLEEDLDA
     AMREKKPIDI INEHLLAGMK VVGDLFGSGQ MQLPFVLQSA ETMKAAVAYL EPHMEKTDAD
     GKGKLLLATV KGDVHDIGKN LVDIIVSNNG YDVVNIGIKQ PINAILEAAE EHQVDAIGMS
     GLLVKSTVVM KENLQEMNAR GVATKYPVLL GGAALTRTYV ENDLDEIYEG DVRYAKDAFE
     GLKLMDRIMA VKRGETPEED AAEEAKKAER KARRERSLRI AEKRRAEQGP EPDLYDTTRS
     DVDPDVPVPV PPFWGAKVVK GVAVADYLSL LDERATFFGQ WGLRGARKGE GPSYEELVES
     EGRPRLRAWI DELSTQGILA HAALVYGYFP CYSEGNDLVV LEKDEPDALE RLRFTFPRQR
     RDRRLCLADF FRSKEKAEQT GQVDVLPMQL VTMGQPIADY ANELFARNAY RDYLEVHGLG
     VQLTEALAEY WHRRIRQELR FPSGAPVAAE DPEDVQQFFR LGYRGARFSF GYGACPDLED
     RAKIVELLDA GRIGVTLSEE FQLHPEQSTD AIVAHHPEAK YFNT
//
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