Annotations: 5HU8

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d5hu8a1	All beta proteins	Viral protein domain	Viral protein domain	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
A	d5hu8a2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
B [auth C]	d5hu8c1	All beta proteins	Viral protein domain	Viral protein domain	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
B [auth C]	d5hu8c2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
C [auth E]	d5hu8e1	All beta proteins	Viral protein domain	Viral protein domain	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
C [auth E]	d5hu8e2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
D [auth B]	d5hu8b_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
E [auth D]	d5hu8d_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)
F	d5hu8f_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	automated matches	automated matches	(unidentified influenza virus ) [TaxId: 11309 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Influenza hemagglutinin headpiece	8087781	4002506	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Influenza hemagglutinin domain-like	8087782	3001342	SCOP2 (2022-06-29)
B [auth C]	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8087782	3001342	SCOP2B (2022-06-29)
C [auth E]	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8087782	3001342	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8087910	3001616	SCOP2B (2022-06-29)
E [auth D]	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8087910	3001616	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8087910	3001616	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	PF00509	e5hu8A1	A: beta sandwiches	X: jelly-roll	H: Viral protein domain (From Topology)	T: Viral protein domain	F: PF00509	ECOD (1.6)
B [auth C]	PF00509	e5hu8C1	A: beta sandwiches	X: jelly-roll	H: Viral protein domain (From Topology)	T: Viral protein domain	F: PF00509	ECOD (1.6)
C [auth E]	PF00509	e5hu8E1	A: beta sandwiches	X: jelly-roll	H: Viral protein domain (From Topology)	T: Viral protein domain	F: PF00509	ECOD (1.6)
D [auth B]	PF00509	e5hu8B1	A: alpha bundles	X: Hemagglutinin HA2 chain (From Topology)	H: Hemagglutinin HA2 chain (From Topology)	T: Hemagglutinin HA2 chain	F: PF00509	ECOD (1.6)
E [auth D]	PF00509	e5hu8D1	A: alpha bundles	X: Hemagglutinin HA2 chain (From Topology)	H: Hemagglutinin HA2 chain (From Topology)	T: Hemagglutinin HA2 chain	F: PF00509	ECOD (1.6)
F	PF00509	e5hu8F1	A: alpha bundles	X: Hemagglutinin HA2 chain (From Topology)	H: Hemagglutinin HA2 chain (From Topology)	T: Hemagglutinin HA2 chain	F: PF00509	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2	CATH (4.3.0)
A	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A	CATH (4.3.0)
B [auth C]	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2	CATH (4.3.0)
B [auth C]	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A	CATH (4.3.0)
C [auth E]	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2	CATH (4.3.0)
C [auth E]	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A	CATH (4.3.0)
D [auth B]	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B	CATH (4.3.0)
E [auth D]	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B	CATH (4.3.0)
F	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth C], C [auth E]	PF00509	Haemagglutinin (Hemagglutinin)	Haemagglutinin	-	Family
D [auth B], E [auth D], F	PF00509	Haemagglutinin (Hemagglutinin)	Haemagglutinin	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth C], C [auth E]	hemagglutinin HA1	host cell surface binding binding host cell surface receptor binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell import into cell receptor-mediated endocytosis of virus by host cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization vesicle-mediated transport biological process involved in interaction with host biological process involved in symbiotic interaction localization symbiont entry into host cell viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell import into cell receptor-mediated endocytosis of virus by host cell biological process involved in interspecies interaction between organisms transport viral life cycle establishment of localization vesicle-mediated transport biological process involved in interaction with host biological process involved in symbiotic interaction localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host cellular process clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell transport of virus membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular component organization or biogenesis virion attachment to host cell adhesion of symbiont to host cell adhesion of symbiont to host	virion component viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane cellular anatomical entity cell periphery apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane
D [auth B], E [auth D], F	hemagglutinin HA2	host cell surface binding binding host cell surface receptor binding	membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane viral process cellular process cellular component organization or biogenesis membrane fusion involved in viral entry into host cell	virion component viral membrane viral envelope

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth C], C [auth E]	IPR001364	Haemagglutinin, influenzavirus A/B	Family
A, B [auth C], C [auth E]	IPR008980	Viral capsid/haemagglutinin protein	Homologous Superfamily
A, B [auth C], C [auth E]	IPR000149	Haemagglutinin, influenzavirus A	Family
A, B [auth C], C [auth E]	IPR013828	Haemagglutinin, HA1 chain, alpha/beta domain superfamily	Homologous Superfamily
D [auth B], E [auth D], F	IPR001364	Haemagglutinin, influenzavirus A/B	Family
D [auth B], E [auth D], F	IPR000386	Haemagglutinin, influenzavirus B	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.