ID E2S9W9_9ACTN Unreviewed; 1266 AA.
AC E2S9W9;
DT 11-JAN-2011, integrated into UniProtKB/TrEMBL.
DT 11-JAN-2011, sequence version 1.
DT 27-MAR-2024, entry version 75.
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:EFQ84043.1};
GN ORFNames=HMPREF0063_10759 {ECO:0000313|EMBL:EFQ84043.1};
OS Aeromicrobium marinum DSM 15272.
OC Bacteria; Actinomycetota; Actinomycetes; Propionibacteriales;
OC Nocardioidaceae; Aeromicrobium.
OX NCBI_TaxID=585531 {ECO:0000313|EMBL:EFQ84043.1, ECO:0000313|Proteomes:UP000003111};
RN [1] {ECO:0000313|EMBL:EFQ84043.1, ECO:0000313|Proteomes:UP000003111}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 15272 {ECO:0000313|EMBL:EFQ84043.1,
RC ECO:0000313|Proteomes:UP000003111};
RA Muzny D., Qin X., Buhay C., Dugan-Rocha S., Ding Y., Chen G., Hawes A.,
RA Holder M., Jhangiani S., Johnson A., Khan Z., Li Z., Liu W., Liu X.,
RA Perez L., Shen H., Wang Q., Watt J., Xi L., Xin Y., Zhou J., Deng J.,
RA Jiang H., Liu Y., Qu J., Song X.-Z., Zhang L., Villasana D., Johnson A.,
RA Liu J., Liyanage D., Lorensuhewa L., Robinson T., Song A., Song B.-B.,
RA Dinh H., Thornton R., Coyle M., Francisco L., Jackson L., Javaid M.,
RA Korchina V., Kovar C., Mata R., Mathew T., Ngo R., Nguyen L., Nguyen N.,
RA Okwuonu G., Ongeri F., Pham C., Simmons D., Wilczek-Boney K., Hale W.,
RA Jakkamsetti A., Pham P., Ruth R., San Lucas F., Warren J., Zhang J.,
RA Zhao Z., Zhou C., Zhu D., Lee S., Bess C., Blankenburg K., Forbes L.,
RA Fu Q., Gubbala S., Hirani K., Jayaseelan J.C., Lara F., Munidasa M.,
RA Palculict T., Patil S., Pu L.-L., Saada N., Tang L., Weissenberger G.,
RA Zhu Y., Hemphill L., Shang Y., Youmans B., Ayvaz T., Ross M.,
RA Santibanez J., Aqrawi P., Gross S., Joshi V., Fowler G., Nazareth L.,
RA Reid J., Worley K., Petrosino J., Highlander S., Gibbs R.;
RL Submitted (AUG-2010) 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 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}.
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:EFQ84043.1}.
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DR EMBL; ACLF03000003; EFQ84043.1; -; Genomic_DNA.
DR RefSeq; WP_007077781.1; NZ_CM001024.1.
DR AlphaFoldDB; E2S9W9; -.
DR STRING; 585531.HMPREF0063_10759; -.
DR eggNOG; COG0646; Bacteria.
DR eggNOG; COG1410; Bacteria.
DR HOGENOM; CLU_004914_2_0_11; -.
DR UniPathway; UPA00051; UER00081.
DR Proteomes; UP000003111; 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; 1.10.288.10; Cobalamin-dependent Methionine Synthase, domain 2; 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_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:UP000003111};
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 12..332
FT /note="Hcy-binding"
FT /evidence="ECO:0000259|PROSITE:PS50970"
FT DOMAIN 363..624
FT /note="Pterin-binding"
FT /evidence="ECO:0000259|PROSITE:PS50972"
FT DOMAIN 655..753
FT /note="B12-binding N-terminal"
FT /evidence="ECO:0000259|PROSITE:PS51337"
FT DOMAIN 758..893
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT DOMAIN 909..1264
FT /note="AdoMet activation"
FT /evidence="ECO:0000259|PROSITE:PS50974"
FT BINDING 254
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 317
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 318
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 703
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 768..772
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 771
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 816
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 820
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 872
FT /ligand="methylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:28115"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 981
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 1171
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
FT BINDING 1226..1227
FT /ligand="S-adenosyl-L-methionine"
FT /ligand_id="ChEBI:CHEBI:59789"
FT /evidence="ECO:0000256|PIRSR:PIRSR000381-2"
SQ SEQUENCE 1266 AA; 139551 MW; 519DF6E4B0C1917D CRC64;
MNHEQQWRPD ATDDLTRMLR ERILVLDGAM GTAIQRDRPD EAGYRGERFA DWPSDVQGNN
DLLTLTQPEI IAGIHREYLE AGADMIETNT FNANCISLSD YGMQDLAYEF NLESARLARR
ECDAMTQRTP DRPRYVAGAL GPTSRTASIS PDVNDPGARN VTYDELVDAY KEATRGLLDG
GSDVIIIETI FDTLNAKAAI FAVETVYEEL GRRWPVIISG TITDASGRTL SGQVTEAFWH
SIRHAKPLLV GLNCALGAQE MRPYIAEMAR VADTFVSCYP NAGLPNAFGE YDEEPDQTAA
IVSEFADAGF VNMVGGCCGT TPAHIASIAR EVDGSTPRPV PDTTPALRLS GLEPVTVVED
TLFVNVGERT NITGSARFRN LIKAGDYTTA LAVARQQVEA GAQVIDVNMD EGMIDGVEAM
DRFMKLVATE PDICRVPTMI DSSKWEVIEA GLKCVQGKSI VNSISMKEGE EKFVREARLC
RKYGAAVVVM AFDEEGQADN LERRRQICER AYRILVDEVG FPAEDIIFDP NVFAVATGIE
EHANYGVDFI EATRWIKQNL PGALVSGGVS NVSFSFRGNN PVREAIHAVF LYHAIGAGMD
MGIVNAGALE VYDEVPELLR ERIEDVILNR REDSTERLLD IAADFAGDGS VKEVATEEWR
SLPVGERITH ALVKGIDEFA ESDTEELRAE ISARGGRPIE VIEGPLMAGM NVVGDLFGEG
KMFLPQVVKS ARVMKKAVAY LIPFIEAEKQ PGDAERSNGK VIMATVKGDV HDIGKNIVGV
VLQCNNYDVV DLGVMVPAQK ILDAAKAEGA DVIGLSGLIT PSLDEMVNFA VEMERQGFEI
PLMIGGATTS RAHTAVKVAE KYHGPVIWVK DASRSVPVVA ALLSDEQRPK LLAETTADYV
TLRERHAARQ DTRKLLPIAV AREKATPIDW TGYQPPRPRL LLQQARDLCS GPGCDHRHGD
ATQFVKTLTD YSLAELRPYI DWQPFFNAWE MRGRFPDILN NPSTGEAARK LYEDAQQMLD
QVVEEKWIRA NGVFGLFPAS QVPGDDIEVY TDESRSAVLT TLHQLRQQGE GREGSARKSL
ADFVAPKDTG LRDYVGAFAV TAGVGIGEKI EEFKKNLDDY NAILLESLAD RLAEAFAERL
HERVRKEFWA HSPHEALSNE DLIGEKYDGI RPAPGYPACP EHTEKQTIWE LLDVEANTGI
ELTESMAMWP GASVSGLYFS HPESQYFVLG RIGRDQVEDY AGRKGWTVTE AERWLSPNLG
YRTEDE
//
