Annotations: 3GW6

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	End_tail_spike	e3gw6A2	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: End_tail_spike	ECOD (1.6)
A	Peptidase_S74	e3gw6A1	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)
B	End_tail_spike	e3gw6B2	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: End_tail_spike	ECOD (1.6)
B	Peptidase_S74	e3gw6B1	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)
C [auth E]	End_tail_spike	e3gw6E2	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: End_tail_spike	ECOD (1.6)
C [auth E]	Peptidase_S74	e3gw6E1	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)
D [auth C]	End_tail_spike	e3gw6C1	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: End_tail_spike	ECOD (1.6)
D [auth C]	Peptidase_S74	e3gw6C2	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)
E [auth D]	End_tail_spike	e3gw6D1	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: End_tail_spike	ECOD (1.6)
E [auth D]	Peptidase_S74	e3gw6D2	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)
F	End_tail_spike	e3gw6F2	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: End_tail_spike	ECOD (1.6)
F	Peptidase_S74	e3gw6F1	A: alpha arrays	X: Intramolecular chaperone domain in virus tail spike protein (From Topology)	H: Intramolecular chaperone domain in virus tail spike protein (From Topology)	T: Intramolecular chaperone domain in virus tail spike protein	F: Peptidase_S74	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
A	1.20.5.1240	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Endo-n-acetylneuraminidase	CATH (4.3.0)
A	3.30.2460.10	Alpha Beta	2-Layer Sandwich	Endo-n-acetylneuraminidase fold	Endo-n-acetylneuraminidase domain	CATH (4.3.0)
A	1.20.5.100	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Cytochrome c1, transmembrane anchor, C-terminal	CATH (4.3.0)
B	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
B	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
C [auth E]	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
C [auth E]	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
D [auth C]	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
D [auth C]	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
E [auth D]	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
E [auth D]	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
F	4.10.1090.10	Few Secondary Structures	Irregular	Endosialidase, domain 4	Endosialidase, domain 4	CATH (4.3.0)
F	1.20.5.1240	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Endo-n-acetylneuraminidase	CATH (4.3.0)
F	3.30.2460.10	Alpha Beta	2-Layer Sandwich	Endo-n-acetylneuraminidase fold	Endo-n-acetylneuraminidase domain	CATH (4.3.0)
F	1.20.5.100	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Cytochrome c1, transmembrane anchor, C-terminal	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	PF13884	Chaperone of endosialidase (Peptidase_S74)	Chaperone of endosialidase	This is the very C-terminal, chaperone, domain of the bacteriophage protein endosialidase. It releases itself, via the serine-lysine dyad at the N-terminus, from the remainder of the end-tail-spike. Cleavage occurs after the threonine which is the fi ...	This is the very C-terminal, chaperone, domain of the bacteriophage protein endosialidase. It releases itself, via the serine-lysine dyad at the N-terminus, from the remainder of the end-tail-spike. Cleavage occurs after the threonine which is the final residue of the End-tail-spike family, Pfam:PF12219. The endosialidase protein forms homotrimeric molecules in bacteriophages [1]. The catalytic dyad allows this portion of the molecule to be cleaved from the more N-terminal region such that the latter can fold and bind to polysialic acid in the bacterial outer envelope [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	Endo-N-acetylneuraminidase	hydrolase activity, acting on glycosyl bonds endo-alpha-(2,8)-sialidase activity alpha-sialidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity identical protein binding protein binding binding	biological process involved in interspecies interaction between organisms symbiont entry into host biological process involved in interaction with host biological process involved in symbiotic interaction virion attachment to host cell adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host symbiont-mediated disruption of host anatomical structure symbiont-mediated disruption of host cell envelope symbiont-mediated disruption of host cellular anatomical structure symbiont entry into host cell via disruption of host cell envelope symbiont entry into host cell biological process involved in interspecies interaction between organisms symbiont entry into host biological process involved in interaction with host biological process involved in symbiotic interaction virion attachment to host cell adhesion of symbiont to host cell viral process viral life cycle adhesion of symbiont to host symbiont-mediated disruption of host anatomical structure symbiont-mediated disruption of host cell envelope symbiont-mediated disruption of host cellular anatomical structure symbiont entry into host cell via disruption of host cell envelope symbiont entry into host cell disruption of anatomical structure in another organism receptor-mediated virion attachment to host cell adhesion receptor-mediated virion attachment to host cell symbiont entry into host cell via disruption of host cell glycocalyx	virus tail, fiber virus tail virion component

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR024427	Endosialidase, beta barrel domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR024428	Endosialidase, beta propeller domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR036278	Sialidase superfamily	Homologous Superfamily
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR023366	ATP synthase subunit alpha, N-terminal domain-like superfamily	Homologous Superfamily
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR024430	Endosialidase, C-terminal domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR024429	Endosialidase, N-terminal extension domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR040775	Tail spike TSP1/Gp66, N-terminal domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR044914	Endosialidase, C-terminal domain superfamily	Homologous Superfamily
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR005604	Bacteriophage T7 tail fibre protein-like, N-terminal domain	Domain
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR001724	Glycosyl hydrolase 58	Family
A, B, C [auth E], D [auth C], E [auth D], A, B, C [auth E], D [auth C], E [auth D], F	IPR030392	Intramolecular chaperone auto-processing domain	Domain

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.