Annotations: 3QR8

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF04717	e3qr8A1	A: beta barrels	X: OB-fold	H: Tail-associated lysozyme gp5-N (From Topology)	T: Tail-associated lysozyme gp5-N	F: PF04717	ECOD (1.6)
A	PF18715	e3qr8A2	A: beta duplicates or obligate multimers	X: Phage tail fiber protein trimerization domain (From Topology)	H: Phage tail fiber protein trimerization domain (From Topology)	T: Phage tail fiber protein trimerization domain	F: PF18715	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.50.230	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	Gp5 N-terminal domain	CATH (4.3.0)
A	6.20.150.10	Special	Other non-globular	Chondroitinase Ac	Chain A, domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04717	Type VI secretion system/phage-baseplate injector OB domain (Phage_base_V)	Type VI secretion system/phage-baseplate injector OB domain	Family of bacterial and phage baseplate assembly proteins responsible for forming the small spike at the end of the tail or bacterial pathogenic needle-shaft [1]. This entry represents the OB fold part of the structure. This structure contains an unu ...	Family of bacterial and phage baseplate assembly proteins responsible for forming the small spike at the end of the tail or bacterial pathogenic needle-shaft [1]. This entry represents the OB fold part of the structure. This structure contains an unusual extra beta hairpin that forms the foundation of the spike protein's beta helix [3].	Domain
A	PF18715	Phage spike trimer (Phage_spike)	Phage spike trimer	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Baseplate assembly protein V	cation binding ion binding binding metal ion binding small molecule binding	symbiont-mediated disruption of host anatomical structure biological process involved in interspecies interaction between organisms viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated perturbation of host membrane symbiont genome entry into host cell via pore formation in plasma membrane symbiont-mediated disruption of host cellular anatomical entity symbiont entry into host cell viral process symbiont entry into host disruption of anatomical structure in another organism virion attachment to host cell receptor-mediated virion attachment to host cell symbiont-mediated disruption of host anatomical structure biological process involved in interspecies interaction between organisms viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated perturbation of host membrane symbiont genome entry into host cell via pore formation in plasma membrane symbiont-mediated disruption of host cellular anatomical entity symbiont entry into host cell viral process symbiont entry into host disruption of anatomical structure in another organism virion attachment to host cell receptor-mediated virion attachment to host cell adhesion of symbiont to host cell entry receptor-mediated virion attachment to host cell adhesion of symbiont to host virion assembly viral tail assembly	virus tail virion component virus tail, baseplate

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006531	Gp5/Type VI secretion system Vgr protein, OB-fold domain	Domain
A	IPR044033	GpV-like, apex motif	Conserved Site
A	IPR013046	Phage baseplate assembly protein V/Gp45	Family
A	IPR037026	Vgr protein, OB-fold domain superfamily	Homologous Superfamily
A	IPR040629	Phage spike trimer	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.