ID A0A367F8P3_9ACTN Unreviewed; 207 AA.
AC A0A367F8P3;
DT 07-NOV-2018, integrated into UniProtKB/TrEMBL.
DT 07-NOV-2018, sequence version 1.
DT 24-JAN-2024, entry version 19.
DE RecName: Full=Methylated-DNA--protein-cysteine methyltransferase {ECO:0000256|ARBA:ARBA00015377};
DE EC=2.1.1.63 {ECO:0000256|ARBA:ARBA00011918};
GN ORFNames=DTL70_06635 {ECO:0000313|EMBL:RCG26723.1};
OS Streptomyces diacarni.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Streptomyces.
OX NCBI_TaxID=2800381 {ECO:0000313|EMBL:RCG26723.1, ECO:0000313|Proteomes:UP000252914};
RN [1] {ECO:0000313|EMBL:RCG26723.1, ECO:0000313|Proteomes:UP000252914}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=LHW51701 {ECO:0000313|EMBL:RCG26723.1,
RC ECO:0000313|Proteomes:UP000252914};
RA Li L.;
RT "Streptomyces reniochalinae sp. nov. and Streptomyces diacarnus sp. nov.
RT from marine sponges.";
RL Submitted (JUN-2018) 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|ARBA:ARBA00003317}.
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 -!- 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};
CC -!- COFACTOR:
CC Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC Evidence={ECO:0000256|ARBA:ARBA00001947};
CC -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000256|ARBA:ARBA00004123}.
CC -!- SIMILARITY: Belongs to the MGMT family.
CC {ECO:0000256|ARBA:ARBA00008711}.
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:RCG26723.1}.
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DR EMBL; QOIN01000033; RCG26723.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A367F8P3; -.
DR OrthoDB; 9802228at2; -.
DR Proteomes; UP000252914; Unassembled WGS sequence.
DR GO; GO:0003908; F:methylated-DNA-[protein]-cysteine S-methyltransferase activity; IEA:UniProtKB-EC.
DR GO; GO:0006304; P:DNA modification; IEA:UniProt.
DR GO; GO:0006281; P:DNA repair; IEA:UniProtKB-KW.
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 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; IPR036631; MGMT_N_sf.
DR InterPro; IPR036388; WH-like_DNA-bd_sf.
DR NCBIfam; TIGR00589; ogt; 1.
DR PANTHER; PTHR46460; METHYLATED-DNA--PROTEIN-CYSTEINE METHYLTRANSFERASE; 1.
DR PANTHER; PTHR46460:SF1; 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 DNA damage {ECO:0000256|ARBA:ARBA00023204};
KW DNA repair {ECO:0000256|ARBA:ARBA00023204};
KW DNA-binding {ECO:0000256|ARBA:ARBA00023125};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Methyltransferase {ECO:0000256|ARBA:ARBA00022603,
KW ECO:0000313|EMBL:RCG26723.1};
KW Phosphoprotein {ECO:0000256|ARBA:ARBA00022553};
KW Reference proteome {ECO:0000313|Proteomes:UP000252914};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000313|EMBL:RCG26723.1};
KW Zinc {ECO:0000256|ARBA:ARBA00022833}.
FT DOMAIN 38..114
FT /note="Methylguanine DNA methyltransferase ribonuclease-
FT like"
FT /evidence="ECO:0000259|Pfam:PF02870"
FT DOMAIN 121..201
FT /note="Methylated-DNA-[protein]-cysteine S-
FT methyltransferase DNA binding"
FT /evidence="ECO:0000259|Pfam:PF01035"
FT REGION 1..32
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ SEQUENCE 207 AA; 20804 MW; 9F56853C05108F85 CRC64;
MTDTTVEPPG GPSDGQAGPD TPAAAAAGAP ATASARAVRE TPIGPLLLAA TDKGLVNVVF
HASGRILEKA LTRLSGRLGA AGSSPAADAH LATAVTELDH YFDGATGPFT VPLDWSLTGG
FHERVLRELA AGVPYGTTVG YQDLALRVGD AGAARAVGLA MGANPLPVVV PCHRVLESSG
AIGGFGGGLE TKRRLLALEG ILPQPLF
//