Annotations: 9L8Z

The complex structure of antibody CF22 bound to the hemagglutinin of influenza B virus

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	Glycolytic	e9l8zC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Glycolytic	ECOD (v295.2)
B	Glycolytic	e9l8zB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Glycolytic	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C, F	Heavy Chain	IGHV4	-	hemagglutinin	SAbDab (2026-09-25)
B, E	Light Chain	IGLV3	Lambda	hemagglutinin	SAbDab (2026-09-25)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, F	The heavy chain of antibody VAC-CF22	-	-	-
B, E	The light chain of antibody CAV-CF22	-	-	-
A, D	Hemagglutinin	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 membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont entry into host cell symbiont entry into host endocytosis involved in viral entry into host cell non-lytic viral release viral budding virion assembly exit from host cell viral budding from plasma membrane viral release from host cell	cellular anatomical structure membrane virion component virion membrane viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane other organism part

InterPro: Protein Family Classification InterPro Database Homepage

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