ID F0SX43_SYNGF Unreviewed; 156 AA.
AC F0SX43;
DT 03-MAY-2011, integrated into UniProtKB/TrEMBL.
DT 03-MAY-2011, sequence version 1.
DT 27-MAR-2024, entry version 60.
DE RecName: Full=Methylated-DNA--protein-cysteine methyltransferase {ECO:0000256|HAMAP-Rule:MF_00772};
DE EC=2.1.1.63 {ECO:0000256|HAMAP-Rule:MF_00772};
DE AltName: Full=6-O-methylguanine-DNA methyltransferase {ECO:0000256|HAMAP-Rule:MF_00772};
DE Short=MGMT {ECO:0000256|HAMAP-Rule:MF_00772};
DE AltName: Full=O-6-methylguanine-DNA-alkyltransferase {ECO:0000256|HAMAP-Rule:MF_00772};
GN OrderedLocusNames=Sgly_1525 {ECO:0000313|EMBL:ADY55826.1};
OS Syntrophobotulus glycolicus (strain DSM 8271 / FlGlyR).
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Desulfitobacteriaceae;
OC Syntrophobotulus.
OX NCBI_TaxID=645991 {ECO:0000313|EMBL:ADY55826.1, ECO:0000313|Proteomes:UP000007488};
RN [1] {ECO:0000313|EMBL:ADY55826.1, ECO:0000313|Proteomes:UP000007488}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 8271 / FlGlyR {ECO:0000313|Proteomes:UP000007488};
RX PubMed=21886864;
RA Han C., Mwirichia R., Chertkov O., Held B., Lapidus A., Nolan M., Lucas S.,
RA Hammon N., Deshpande S., Cheng J.F., Tapia R., Goodwin L., Pitluck S.,
RA Huntemann M., Liolios K., Ivanova N., Pagani I., Mavromatis K.,
RA Ovchinikova G., Pati A., Chen A., Palaniappan K., Land M., Hauser L.,
RA Brambilla E.M., Rohde M., Spring S., Sikorski J., Goker M., Woyke T.,
RA Bristow J., Eisen J.A., Markowitz V., Hugenholtz P., Kyrpides N.C.,
RA Klenk H.P., Detter J.C.;
RT "Complete genome sequence of Syntrophobotulus glycolicus type strain
RT (FlGlyR).";
RL Stand. Genomic Sci. 4:371-380(2011).
RN [2] {ECO:0000313|Proteomes:UP000007488}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 8271 / FlGlyR {ECO:0000313|Proteomes:UP000007488};
RA Lucas S., Copeland A., Lapidus A., Bruce D., Goodwin L., Pitluck S.,
RA Kyrpides N., Mavromatis K., Pagani I., Ivanova N., Mikhailova N.,
RA Chertkov O., Held B., Detter J.C., Tapia R., Han C., Land M., Hauser L.,
RA Markowitz V., Cheng J.-F., Hugenholtz P., Woyke T., Wu D., Spring S.,
RA Schroeder M., Brambilla E., Klenk H.-P., Eisen J.A.;
RT "The complete genome of Syntrophobotulus glycolicus DSM 8271.";
RL Submitted (FEB-2011) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Involved in the cellular defense against the biological
CC effects of O6-methylguanine (O6-MeG) and O4-methylthymine (O4-MeT) in
CC DNA. Repairs the methylated nucleobase in DNA by stoichiometrically
CC transferring the methyl group to a cysteine residue in the enzyme. This
CC is a suicide reaction: the enzyme is irreversibly inactivated.
CC {ECO:0000256|HAMAP-Rule:MF_00772}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 4-O-methyl-thymidine in DNA + L-cysteinyl-[protein] = a
CC thymidine in DNA + S-methyl-L-cysteinyl-[protein];
CC Xref=Rhea:RHEA:53428, Rhea:RHEA-COMP:10131, Rhea:RHEA-COMP:10132,
CC Rhea:RHEA-COMP:13555, Rhea:RHEA-COMP:13556, ChEBI:CHEBI:29950,
CC ChEBI:CHEBI:82612, ChEBI:CHEBI:137386, ChEBI:CHEBI:137387;
CC EC=2.1.1.63; Evidence={ECO:0000256|ARBA:ARBA00001286,
CC ECO:0000256|HAMAP-Rule:MF_00772};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 6-O-methyl-2'-deoxyguanosine in DNA + L-cysteinyl-[protein]
CC = a 2'-deoxyguanosine in DNA + S-methyl-L-cysteinyl-[protein];
CC Xref=Rhea:RHEA:24000, Rhea:RHEA-COMP:10131, Rhea:RHEA-COMP:10132,
CC Rhea:RHEA-COMP:11367, Rhea:RHEA-COMP:11368, ChEBI:CHEBI:29950,
CC ChEBI:CHEBI:82612, ChEBI:CHEBI:85445, ChEBI:CHEBI:85448; EC=2.1.1.63;
CC Evidence={ECO:0000256|ARBA:ARBA00001596, ECO:0000256|HAMAP-
CC Rule:MF_00772};
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00772}.
CC -!- MISCELLANEOUS: This enzyme catalyzes only one turnover and therefore is
CC not strictly catalytic. According to one definition, an enzyme is a
CC biocatalyst that acts repeatedly and over many reaction cycles.
CC {ECO:0000256|HAMAP-Rule:MF_00772}.
CC -!- SIMILARITY: Belongs to the MGMT family. {ECO:0000256|HAMAP-
CC Rule:MF_00772}.
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DR EMBL; CP002547; ADY55826.1; -; Genomic_DNA.
DR RefSeq; WP_013624696.1; NC_015172.1.
DR AlphaFoldDB; F0SX43; -.
DR STRING; 645991.Sgly_1525; -.
DR KEGG; sgy:Sgly_1525; -.
DR eggNOG; COG0350; Bacteria.
DR HOGENOM; CLU_000445_52_2_9; -.
DR OrthoDB; 9789813at2; -.
DR Proteomes; UP000007488; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0003908; F:methylated-DNA-[protein]-cysteine S-methyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006307; P:DNA dealkylation involved in DNA repair; IEA:UniProtKB-UniRule.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR CDD; cd06445; ATase; 1.
DR Gene3D; 3.30.160.70; Methylated DNA-protein cysteine methyltransferase domain; 1.
DR Gene3D; 1.10.10.10; Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain; 1.
DR HAMAP; MF_00772; OGT; 1.
DR InterPro; IPR001497; MethylDNA_cys_MeTrfase_AS.
DR InterPro; IPR014048; MethylDNA_cys_MeTrfase_DNA-bd.
DR InterPro; IPR036217; MethylDNA_cys_MeTrfase_DNAb.
DR InterPro; IPR023546; MGMT.
DR InterPro; IPR036631; MGMT_N_sf.
DR InterPro; IPR036388; WH-like_DNA-bd_sf.
DR NCBIfam; TIGR00589; ogt; 1.
DR PANTHER; PTHR10815; METHYLATED-DNA--PROTEIN-CYSTEINE METHYLTRANSFERASE; 1.
DR PANTHER; PTHR10815:SF5; METHYLATED-DNA--PROTEIN-CYSTEINE METHYLTRANSFERASE; 1.
DR Pfam; PF01035; DNA_binding_1; 1.
DR SUPFAM; SSF53155; Methylated DNA-protein cysteine methyltransferase domain; 1.
DR SUPFAM; SSF46767; Methylated DNA-protein cysteine methyltransferase, C-terminal domain; 1.
DR PROSITE; PS00374; MGMT; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_00772};
KW DNA damage {ECO:0000256|HAMAP-Rule:MF_00772};
KW DNA repair {ECO:0000256|ARBA:ARBA00023204, ECO:0000256|HAMAP-
KW Rule:MF_00772};
KW Methyltransferase {ECO:0000256|ARBA:ARBA00022603, ECO:0000256|HAMAP-
KW Rule:MF_00772}; Reference proteome {ECO:0000313|Proteomes:UP000007488};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00772}.
FT DOMAIN 73..152
FT /note="Methylated-DNA-[protein]-cysteine S-
FT methyltransferase DNA binding"
FT /evidence="ECO:0000259|Pfam:PF01035"
FT ACT_SITE 124
FT /note="Nucleophile; methyl group acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00772"
SQ SEQUENCE 156 AA; 17181 MW; D08393F9F0E3A64C CRC64;
MKRVWYDDYP IGVIGIAEDS GSISHLFFGR DKGPAGFEVG ATPLIEKAVL QLREYFDGKR
TEFDLPLCLQ GTEFQQSVWK ALQTIAAAET RSYKEIAVQI GNPKAVRAVG MANNRNPISI
IVPCHRVVGA DGSLTGYGGG LPVKKYLLDL EKRYYA
//
