6IBG

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF21919	e6ibgA2	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: PF21919	ECOD (1.6)
A	F_UNCLASSIFIED	e6ibgA1	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: F_UNCLASSIFIED	ECOD (1.6)
B	PF21919	e6ibgB1	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: PF21919	ECOD (1.6)
B	F_UNCLASSIFIED	e6ibgB2	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: F_UNCLASSIFIED	ECOD (1.6)
C	PF21919	e6ibgC2	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: PF21919	ECOD (1.6)
C	F_UNCLASSIFIED	e6ibgC1	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: F_UNCLASSIFIED	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF21919	Barrel domain in phage portal protein (P23-45_portal_barrel)	Barrel domain in phage portal protein	This entry represents a beta barrel domain found in the Thermus phage P23-45 portal protein. The portal protein is a key component of many double-stranded DNA viruses, governing capsid assembly and genome packaging. Twelve subunits of the portal prot ...	This entry represents a beta barrel domain found in the Thermus phage P23-45 portal protein. The portal protein is a key component of many double-stranded DNA viruses, governing capsid assembly and genome packaging. Twelve subunits of the portal protein define a tunnel, through which DNA is translocated into the capsid.	Domain