Annotations: 3WX4

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EUF08469	e3wx4A1	A: a+b two layers	X: DNA Mimic Protein Arn (From Topology)	H: DNA Mimic Protein Arn (From Topology)	T: DNA Mimic Protein Arn	F: EUF08469	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.70.2770	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.2.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF22134	DNA Mimic Protein Arn (DM_Arn)	DNA Mimic Protein Arn	This entry represents Arn (Anti-restriction nuclease) proteins found in Caudoviricetes phages. The structure of Arn consists of a three- stranded, anti-parallel beta-sheet on one side, while on the otherside, four alpha-helices are bundled together. ...	This entry represents Arn (Anti-restriction nuclease) proteins found in Caudoviricetes phages. The structure of Arn consists of a three- stranded, anti-parallel beta-sheet on one side, while on the otherside, four alpha-helices are bundled together. Arn was identified as an inhibitor of the restriction enzyme McrBC. A structural analysis of Arn revealed that its shape and negative charge distribution are similar to dsDNA, suggesting that this protein could act as a DNA mimic [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Anti-restriction endonuclease	endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid catalytic activity	symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host immune response biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host process symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction response to stimulus response to other organism symbiont-mediated evasion of recognition by host innate immune effector symbiont-mediated response to host defenses symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host immune response biological process involved in interspecies interaction between organisms symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host process symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction response to stimulus response to other organism symbiont-mediated evasion of recognition by host innate immune effector symbiont-mediated response to host defenses symbiont-mediated evasion of host innate immune response response to external stimulus symbiont-mediated evasion of host restriction-modification system response to biotic stimulus response to host immune response symbiont-mediated evasion of host immune response response to host response to external biotic stimulus	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR053757	Anti-restriction Endonuclease Superfamily	Homologous Superfamily
A	IPR054385	Anti-restriction endonuclease	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 R01GM157729.