Annotations: 3J4A

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L [auth I]	Head-tail_con_2nd	e3j4aI1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
L [auth I]	Head-tail_con_1st	e3j4aI2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
K [auth H]	Head-tail_con_2nd	e3j4aH1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
K [auth H]	Head-tail_con_1st	e3j4aH2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
J [auth G]	Head-tail_con_2nd	e3j4aG1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
J [auth G]	Head-tail_con_1st	e3j4aG2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
I [auth F]	Head-tail_con_2nd	e3j4aF1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
I [auth F]	Head-tail_con_1st	e3j4aF2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
H [auth E]	Head-tail_con_2nd	e3j4aE1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
H [auth E]	Head-tail_con_1st	e3j4aE2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
G [auth D]	Head-tail_con_2nd	e3j4aD1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
G [auth D]	Head-tail_con_1st	e3j4aD2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
F [auth C]	Head-tail_con_2nd	e3j4aC1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
F [auth C]	Head-tail_con_1st	e3j4aC2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
E [auth B]	Head-tail_con_2nd	e3j4aB1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
E [auth B]	Head-tail_con_1st	e3j4aB2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
D [auth L]	Head-tail_con_2nd	e3j4aL1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
D [auth L]	Head-tail_con_1st	e3j4aL2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
C [auth K]	Head-tail_con_2nd	e3j4aK1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
C [auth K]	Head-tail_con_1st	e3j4aK2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
B [auth J]	Head-tail_con_2nd	e3j4aJ1	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
B [auth J]	Head-tail_con_1st	e3j4aJ2	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)
A	Head-tail_con_2nd	e3j4aA2	A: beta barrels	X: Barrel domain in upper collar protein (From Topology)	H: Barrel domain in upper collar protein (From Topology)	T: Barrel domain in upper collar protein	F: Head-tail_con_2nd	ECOD (1.6)
A	Head-tail_con_1st	e3j4aA1	A: alpha bundles	X: Alpha-helical domain in upper collar protein (From Topology)	H: Alpha-helical domain in upper collar protein (From Topology)	T: Alpha-helical domain in upper collar protein	F: Head-tail_con_1st	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth J], C [auth K], D [auth L], E [auth B], A, B [auth J], C [auth K], D [auth L], E [auth B], F [auth C], G [auth D], H [auth E], I [auth F], J [auth G], K [auth H], L [auth I]	PF12236	Bacteriophage head to tail connecting protein (Head-tail_con)	Bacteriophage head to tail connecting protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth J], C [auth K], D [auth L], E [auth B], A, B [auth J], C [auth K], D [auth L], E [auth B], F [auth C], G [auth D], H [auth E], I [auth F], J [auth G], K [auth H], L [auth I]	Head-to-tail joining protein	-	virion assembly viral process viral life cycle viral genome packaging viral DNA genome packaging symbiont genome ejection through host cell envelope biological process involved in interspecies interaction between organisms symbiont entry into host cell symbiont entry into host symbiont genome ejection through host cell envelope, short tail mechanism biological process involved in interaction with host biological process involved in symbiotic interaction	protein-containing complex viral capsid virion component viral portal complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth J], C [auth K], D [auth L], E [auth B], A, B [auth J], C [auth K], D [auth L], E [auth B], F [auth C], G [auth D], H [auth E], I [auth F], J [auth G], K [auth H], L [auth I]	IPR038995	Portal protein, Caudovirales	Family
A, B [auth J], C [auth K], D [auth L], E [auth B], A, B [auth J], C [auth K], D [auth L], E [auth B], F [auth C], G [auth D], H [auth E], I [auth F], J [auth G], K [auth H], L [auth I]	IPR020991	Head-to-tail connector protein, podovirus-type	Family