1MGT

CRYSTAL STRUCTURE OF O6-METHYLGUANINE-DNA METHYLTRANSFERASE FROM HYPERTHERMOPHILIC ARCHAEON PYROCOCCUS KODAKARAENSIS STRAIN KOD1

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1mgta1	All alpha proteins	DNA/RNA-binding 3-helical bundle	Methylated DNA-protein cysteine methyltransferase, C-terminal domain	Methylated DNA-protein cysteine methyltransferase, C-terminal domain	O6-alkylguanine-DNA alkyltransferase	(Thermococcus kodakarensis KOD1 ) [TaxId: 69014 ],	SCOPe (2.08)
A	d1mgta2	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Methylated DNA-protein cysteine methyltransferase domain	Methylated DNA-protein cysteine methyltransferase domain	O6-alkylguanine-DNA alkyltransferase	(Thermococcus kodakarensis KOD1 ) [TaxId: 69014 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Methylated DNA-protein cysteine methyltransferase domain	8032185	4000565	SCOP2 (2022-06-29)
A	SCOP2 Family	Methylated DNA-protein cysteine methyltransferase C-terminal domain	8024159	4000678	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Methylated DNA-protein cysteine methyltransferase domain	8044563	3000599	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Methylated DNA-protein cysteine methyltransferase C-terminal domain	8036538	3001016	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DNA_binding_1	e1mgtA1	A: alpha arrays	X: HTH	H: HTH	T: Methylated DNA-protein cysteine methyltransferase-C	F: DNA_binding_1	ECOD (1.6)
A	DUF1938	e1mgtA2	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Methylated DNA-protein cysteine methyltransferase domain (From Topology)	T: Methylated DNA-protein cysteine methyltransferase domain	F: DUF1938	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.160.70	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain	Methylated DNA-protein cysteine methyltransferase domain	CATH (4.3.0)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF09153	Methylated DNA-protein cysteine methyltransferase, N-terminal (MGMT_N)	Methylated DNA-protein cysteine methyltransferase, N-terminal	This domain is found in the archaeal protein O6-alkylguanine-DNA alkyltransferase (also known as Methylated DNA-protein cysteine methyltransferase MGMT), adopt a secondary structure consisting of a three stranded antiparallel beta-sheet and three alp ...	This domain is found in the archaeal protein O6-alkylguanine-DNA alkyltransferase (also known as Methylated DNA-protein cysteine methyltransferase MGMT), adopt a secondary structure consisting of a three stranded antiparallel beta-sheet and three alpha helices. This entry represents the N-terminal ribonuclease H-like domain, associated with 6-O-methylguanine DNA methyltransferase activity. The exact function has not, as yet, been defined, though it has been postulated that they confer thermostability to the archaeal protein [1].	Domain
A	PF01035	6-O-methylguanine DNA methyltransferase, DNA binding domain (DNA_binding_1)	6-O-methylguanine DNA methyltransferase, DNA binding domain	This is the C-terminal DNA-binding domain of 6-O-methylguanine-DNA methyltransferases [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (O6-METHYLGUANINE-DNA METHYLTRANSFERASE)	catalytic activity, acting on a protein transferase activity, transferring one-carbon groups S-methyltransferase activity protein methyltransferase activity methylated-DNA-[protein]-cysteine S-methyltransferase activity transferase activity methyltransferase activity catalytic activity	methylation metabolic process cellular response to stimulus response to stimulus primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process DNA alkylation repair cellular response to stress DNA damage response response to stress methylation metabolic process cellular response to stimulus response to stimulus primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process DNA alkylation repair cellular response to stress DNA damage response response to stress cellular process macromolecule metabolic process DNA repair	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001497	Methylated-DNA-[protein]-cysteine S-methyltransferase, active site	Active Site
A	IPR015236	Methylated DNA-protein cysteine methyltransferase, ribonuclease H-like domain	Domain
A	IPR036217	Methylated DNA-protein cysteine methyltransferase, DNA binding domain	Homologous Superfamily
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR036631	Methylated DNA-protein cysteine methyltransferase domain superfamily	Homologous Superfamily
A	IPR023546	Methylated-DNA--protein-cysteine methyltransferase	Family
A	IPR014048	Methylated-DNA-[protein]-cysteine S-methyltransferase, DNA binding	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.