4R5Q

Crystal structure and nuclease activity of the CRISPR-associated Cas4 protein Pcal_0546 from Pyrobaculum calidifontis containing a [2Fe-2S] cluster

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)
A	PF01930	e4r5qA1	A: a/b three-layered sandwiches	X: Restriction endonuclease-like	H: Restriction endonuclease-like (From Topology)	T: Restriction endonuclease-like	F: PF01930	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.320.10	Alpha Beta	Alpha-Beta Complex	Lambda Exonuclease	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF12705	PD-(D/E)XK nuclease superfamily (PDDEXK_1)	PD-(D/E)XK nuclease superfamily	Members of this family belong to the PD-(D/E)XK nuclease superfamily	Domain
A	PF01930	Domain of unknown function DUF83 (Cas_Cas4)	Domain of unknown function DUF83	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	CRISPR-associated exonuclease, Cas4 family	DNA endonuclease activity endonuclease activity catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on a nucleic acid hydrolase activity single-stranded DNA endodeoxyribonuclease activity catalytic activity DNA nuclease activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding DNA endonuclease activity endonuclease activity catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on a nucleic acid hydrolase activity single-stranded DNA endodeoxyribonuclease activity catalytic activity DNA nuclease activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding cation binding ion binding metal ion binding single-stranded DNA 5'-3' DNA exonuclease activity DNA exonuclease activity 5'-3' exonuclease activity 5'-3' DNA exonuclease activity DNA exonuclease activity, producing 5'-phosphomonoesters exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters single-stranded DNA exodeoxyribonuclease activity exonuclease activity	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 cellular component organization DNA duplex unwinding 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 cellular component organization DNA duplex unwinding organelle organization DNA geometric change chromosome organization cellular process DNA conformation change cellular component organization or biogenesis	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011604	PD-(D/E)XK endonuclease-like domain superfamily	Homologous Superfamily
A	IPR022765	Dna2/Cas4, domain of unknown function DUF83	Domain
A	IPR013343	CRISPR-associated protein Cas4	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.