Annotations: 2KCA

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Phage head-tail joining protein-like	8047300	4005560	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Phage head-tail joining protein-like	8106666	3002861	SCOP2 (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_H_T_join	e2kcaA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Phage tail proteins	F: Phage_H_T_join	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.10.270	Mainly Beta	Beta Barrel	Thrombin, subunit H	Bacteriophage SPP1 head-tail adaptor protein	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05521	Phage head-tail joining protein (Phage_H_T_join)	Phage head-tail joining protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Bacteriophage SPP1 complete nucleotide sequence	-	symbiont genome ejection through host cell envelope biological process involved in interspecies interaction between organisms symbiont genome ejection through host cell envelope, long flexible tail mechanism symbiont entry into host cell viral process symbiont entry into host viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction	virion component

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008767	Bacteriophage SPP1, head-tail adaptor	Family
A	IPR038666	Bacteriophage SPP1, head-tail adaptor superfamily	Homologous Superfamily

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.