Annotations: 4Z20

Crystal Structure of Meganuclease I-SmaMI Bound to Uncleaveable DNA with a TTGT Central Four

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	B	e4z20D1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: B	ECOD (v294.2)
A	B	e4z20A1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: B	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	3.10.28.10	Alpha Beta	Roll	Endonuclease I-creI	Homing endonucleases	CATH (4.3.0)
A	3.10.28.10	Alpha Beta	Roll	Endonuclease I-creI	Homing endonucleases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D	PF00961	LAGLIDADG endonuclease (LAGLIDADG_1)	LAGLIDADG endonuclease		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth B], F [auth E]	DNA (26-MER)	-	-	-
B [auth C], E [auth F]	DNA (26-MER)	-	-	-
A, D	MEGANUCLEASE I-SMAMI	endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid catalytic activity cation binding ion binding binding metal ion binding small molecule binding	-	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D	IPR051289	LAGLIDADG Homing Endonuclease	Family
A, D	IPR004860	Homing endonuclease, LAGLIDADG domain	Domain
A, D	IPR027434	Homing endonuclease	Homologous Superfamily

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.