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Database: UniProt
Entry: I3D7Z5_9PAST
LinkDB: I3D7Z5_9PAST
Original site: I3D7Z5_9PAST 
ID   I3D7Z5_9PAST            Unreviewed;       179 AA.
AC   I3D7Z5;
DT   11-JUL-2012, integrated into UniProtKB/TrEMBL.
DT   11-JUL-2012, sequence version 1.
DT   24-JAN-2024, entry version 41.
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   ORFNames=HMPREF1052_0589 {ECO:0000313|EMBL:EIJ67838.1};
OS   Pasteurella bettyae CCUG 2042.
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Pasteurella.
OX   NCBI_TaxID=1095749 {ECO:0000313|EMBL:EIJ67838.1, ECO:0000313|Proteomes:UP000006457};
RN   [1] {ECO:0000313|EMBL:EIJ67838.1, ECO:0000313|Proteomes:UP000006457}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCUG 2042 {ECO:0000313|EMBL:EIJ67838.1,
RC   ECO:0000313|Proteomes:UP000006457};
RA   Harkins D.M., Madupu R., Durkin A.S., Torralba M., Methe B., Sutton G.G.,
RA   Nelson K.E.;
RL   Submitted (MAR-2012) 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}.
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:EIJ67838.1}.
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DR   EMBL; AJSX01000041; EIJ67838.1; -; Genomic_DNA.
DR   RefSeq; WP_005761597.1; NZ_AJSX01000041.1.
DR   AlphaFoldDB; I3D7Z5; -.
DR   PATRIC; fig|1095749.3.peg.1888; -.
DR   eggNOG; COG0350; Bacteria.
DR   OrthoDB; 9811249at2; -.
DR   Proteomes; UP000006457; Unassembled WGS sequence.
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; IPR008332; MethylG_MeTrfase_N.
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   Pfam; PF02870; Methyltransf_1N; 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:UP000006457};
KW   Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW   Rule:MF_00772}.
FT   DOMAIN          4..68
FT                   /note="Methylguanine DNA methyltransferase ribonuclease-
FT                   like"
FT                   /evidence="ECO:0000259|Pfam:PF02870"
FT   DOMAIN          79..159
FT                   /note="Methylated-DNA-[protein]-cysteine S-
FT                   methyltransferase DNA binding"
FT                   /evidence="ECO:0000259|Pfam:PF01035"
FT   ACT_SITE        130
FT                   /note="Nucleophile; methyl group acceptor"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00772"
SQ   SEQUENCE   179 AA;  20164 MW;  D96E29A4A7B70F7D CRC64;
     MSEIYYSYYS SPIGNLLMIA QDDQLTNLDF EAEQNAPNPK WLLNDQLPLF HQVKKALNRY
     FDGKKENFEG IPVNPQGTAF QQSIWAALRQ ISYGKTSTYG ELAQLINHPQ AVRAVGGAVG
     SNPISIIIPC HRILGKNNQL TGFGGGLPAK RFLLKLEQIE YVDKGVEYVK PKLLKKYYD
//
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