Annotations: 2KX4

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2kx4a_	All beta proteins	Phage tail proteins	Phage tail proteins	gpFII-like	Tail attachment protein gpF3	(Lambdavirus lambda ) [TaxId: 10710 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Phage tail proteins	8040058	3000268	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Phage_attach	e2kx4A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Phage tail proteins	F: Phage_attach	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.10.180	Mainly Beta	Beta Barrel	Thrombin, subunit H	Phage tail proteins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05354	Phage Head-Tail Attachment protein (Phage_attach)	Phage Head-Tail Attachment protein	This entry includes the phage lambda head-tail attachment protein FII that is required for the joining of phage heads and tails at the last step of morphogenesis [1]. Plays a role in virion assembly by joining the head and the tail at the last step o ...	This entry includes the phage lambda head-tail attachment protein FII that is required for the joining of phage heads and tails at the last step of morphogenesis [1]. Plays a role in virion assembly by joining the head and the tail at the last step of morphogenesis. Six FII proteins probably bind protein W that closes the DNA-filled capsid, as well as the U tail terminator protein of the pre-assembled tail.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Tail attachment protein	-	virion assembly viral process viral life cycle	virion component host cellular component host intracellular part cellular anatomical structure host cell cytoplasm host cell part host intracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR053734	Bacteriophage Head-Tail Connecting Superfamily	Homologous Superfamily
A	IPR008018	Bacteriophage tail attachment protein FII	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.