Annotations: 6MCB

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth A]	PF16592,PF16593	e6mcbA4	A: alpha complex topology	X: CRISPR-associated endonuclease Cas9 alpha-helical lobe	H: CRISPR-associated endonuclease Cas9 alpha-helical lobe (From Topology)	T: CRISPR-associated endonuclease Cas9 alpha-helical lobe	F: PF16592,PF16593	ECOD (1.6)
B [auth A]	PF16595	e6mcbA3	A: a+b two layers	X: SSHS domain	H: SSHS domain in CRISPR-associated endonuclease Cas9 (From Topology)	T: SSHS domain in CRISPR-associated endonuclease Cas9	F: PF16595	ECOD (1.6)
B [auth A]	PF16595	e6mcbA5	A: a+b complex topology	X: CRISPR-associated endonuclease Cas9 C-terminal domain (From Topology)	H: CRISPR-associated endonuclease Cas9 C-terminal domain (From Topology)	T: CRISPR-associated endonuclease Cas9 C-terminal domain	F: PF16595	ECOD (1.6)
B [auth A]	PF22702	e6mcbA1	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: PF22702	ECOD (1.6)
B [auth A]	PF13395	e6mcbA2	A: few secondary structure elements	X: His-Me finger endonucleases (From Homology)	H: His-Me finger endonucleases	T: His-Me finger endonucleases	F: PF13395	ECOD (1.6)
C	F_UNCLASSIFIED	e6mcbC1	A: a+b two layers	X: dsRBD-like	H: Anti-CRISPR protein AcrIIA2 (From Topology)	T: Anti-CRISPR protein AcrIIA2	F: F_UNCLASSIFIED	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A]	PF16592	REC lobe of CRISPR-associated endonuclease Cas9 (Cas9_REC)	REC lobe of CRISPR-associated endonuclease Cas9	-	Family
B [auth A]	PF16593	Bridge helix of CRISPR-associated endonuclease Cas9 (Cas9-BH)	Bridge helix of CRISPR-associated endonuclease Cas9	-	Family
B [auth A]	PF16595	PAM-interacting domain of CRISPR-associated endonuclease Cas9 (Cas9_PI)	PAM-interacting domain of CRISPR-associated endonuclease Cas9	Cas9_PI is a family found at the C-terminal of bacterial type II CRISPR system Cas9 endonuclease. This domain adopts a novel protein fold that is unique to the Cas9 family. It is positioned in the structure-DNA-complex to recognise the PAM sequence o ...	Cas9_PI is a family found at the C-terminal of bacterial type II CRISPR system Cas9 endonuclease. This domain adopts a novel protein fold that is unique to the Cas9 family. It is positioned in the structure-DNA-complex to recognise the PAM sequence on the non-complementary DNA strand of the crRNA. PAM sequence is protospacer-adjacent motifs on DNA. See family CRISPR-DR2, Rfam:RF01315. Cas9 carries two nuclease domains, HNH and RuvC, which cleave the DNA strands that are complementary and non-complementary to the 20 nucleotide guide sequence in crRNAs, respectively [1].	Domain
B [auth A]	PF13395	HNH endonuclease (HNH_4)	HNH endonuclease	This HNH nuclease domain is found in CRISPR-related proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	Single guide RNA (116-MER)	-	-	-
B [auth A]	CRISPR-associated endonuclease Cas9	DNA binding binding organic cyclic compound binding nucleic acid binding endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity RNA binding cation binding ion binding metal ion binding small molecule binding	maintenance of CRISPR repeat elements chromosome organization primary metabolic process DNA metabolic process maintenance of DNA repeat elements nucleic acid metabolic process cellular component organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organelle organization organic substance metabolic process cellular process metabolic process cellular component organization or biogenesis maintenance of CRISPR repeat elements chromosome organization primary metabolic process DNA metabolic process maintenance of DNA repeat elements nucleic acid metabolic process cellular component organization nucleobase-containing compound metabolic process organic cyclic compound metabolic process organelle organization organic substance metabolic process cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to virus defense response to other organism response to stress response to external biotic stimulus response to virus	-
C	Anti-CRISPR protein AcrIIA2	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A]	IPR036397	Ribonuclease H superfamily	Homologous Superfamily
B [auth A]	IPR032240	CRISPR-associated endonuclease Cas9, REC lobe	Domain
B [auth A]	IPR032239	CRISPR-associated endonuclease Cas9, bridge helix	Domain
B [auth A]	IPR033114	Cas9-type HNH domain	Domain
B [auth A]	IPR028629	CRISPR-associated endonuclease Cas9	Family
B [auth A]	IPR003615	HNH nuclease	Domain
B [auth A]	IPR032237	CRISPR-associated endonuclease Cas9, PAM-interacting domain	Domain

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 R01GM133198.