Annotations: 7KFU

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	CRISPR_Cas2	e7kfuA1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR associated protein Cas2-like (From Topology)	T: CRISPR associated protein Cas2-like	F: CRISPR_Cas2	ECOD (1.6)
B	CRISPR_Cas2	e7kfuB1	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR associated protein Cas2-like (From Topology)	T: CRISPR associated protein Cas2-like	F: CRISPR_Cas2	ECOD (1.6)
C	Cas_Cas1	e7kfuC1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
C	RVT_1	e7kfuC2	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: RVT_1	ECOD (1.6)
C	F_UNCLASSIFIED	e7kfuC3	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR transcript (pre-crRNA) processing endoribonuclease-related (From Topology)	T: CRISPR transcript (pre-crRNA) processing endoribonuclease-related	F: F_UNCLASSIFIED	ECOD (1.6)
D	Cas_Cas1	e7kfuD1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
E	Cas_Cas1	e7kfuE1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)
E	RVT_1	e7kfuE2	A: a+b two layers	X: Alpha-beta plaits	H: Adenylyl and guanylyl cyclase catalytic domain-like	T: Adenylyl and guanylyl cyclase catalytic domain-like	F: RVT_1	ECOD (1.6)
E	F_UNCLASSIFIED	e7kfuE3	A: a+b two layers	X: Alpha-beta plaits	H: CRISPR transcript (pre-crRNA) processing endoribonuclease-related (From Topology)	T: CRISPR transcript (pre-crRNA) processing endoribonuclease-related	F: F_UNCLASSIFIED	ECOD (1.6)
F	Cas_Cas1	e7kfuF1	A: alpha complex topology	X: Cas1 (From Topology)	H: Cas1 (From Topology)	T: Cas1	F: Cas_Cas1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF09827	CRISPR associated protein Cas2 (CRISPR_Cas2)	CRISPR associated protein Cas2	-	Family
C, D, E, F	PF01867	CRISPR associated protein Cas1 (Cas_Cas1)	CRISPR associated protein Cas1	-	Family
C, D, E, F	PF00078	Reverse transcriptase (RNA-dependent DNA polymerase) (RVT_1)	Reverse transcriptase (RNA-dependent DNA polymerase)	A reverse transcriptase gene is usually indicative of a mobile element such as a retrotransposon or retrovirus. Reverse transcriptases occur in a variety of mobile elements, including retrotransposons, retroviruses, group II introns, bacterial msDNAs ...	A reverse transcriptase gene is usually indicative of a mobile element such as a retrotransposon or retrovirus. Reverse transcriptases occur in a variety of mobile elements, including retrotransposons, retroviruses, group II introns, bacterial msDNAs, hepadnaviruses, and caulimoviruses.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Cas2	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity cation binding ion binding binding metal ion binding small molecule binding	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 maintenance of CRISPR repeat elements chromosome organization 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 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 organelle organization cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process	-
C, D, E, F	Cas6-RT-Cas1	DNA binding binding organic cyclic compound binding nucleic acid binding RNA-directed DNA polymerase activity catalytic activity, acting on DNA DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups endonuclease activity nuclease activity DNA binding binding organic cyclic compound binding nucleic acid binding RNA-directed DNA polymerase activity catalytic activity, acting on DNA DNA polymerase activity catalytic activity, acting on a nucleic acid transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase 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 organelle organization cellular process metabolic process cellular component organization or biogenesis macromolecule metabolic process biological process involved in interspecies interaction between organisms 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 organelle organization 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	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR019199	Virulence-associated protein D / CRISPR associated protein Cas2	Family
A, B	IPR021127	CRISPR-associated endonuclease Cas2	Family
C, D, E, F	IPR002729	CRISPR-associated protein Cas1	Family
C, D, E, F	IPR042206	CRISPR-associated endonuclease Cas1, C-terminal domain	Homologous Superfamily
C, D, E, F	IPR042211	CRISPR-associated endonuclease Cas1, N-terminal domain	Homologous Superfamily
C, D, E, F	IPR043502	DNA/RNA polymerase superfamily	Homologous Superfamily
C, D, E, F	IPR043128	Reverse transcriptase/Diguanylate cyclase domain	Homologous Superfamily
C, D, E, F	IPR000477	Reverse transcriptase domain	Domain
C, D, E, F	IPR000123	RNA-directed DNA polymerase (reverse transcriptase), msDNA	Family
C, D, E, F	IPR050646	CRISPR-associated endonuclease Cas1	Family

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.