8UDG | pdb_00008udg

S1V2-72 Fab bound to EHA2 from influenza B/Malaysia/2506/2004

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)
D [auth H]	Helicase_C	e8udgH1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
F [auth M]	Helicase_C	e8udgM1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
E [auth L]	Helicase_C	e8udgL1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
G [auth N]	Helicase_C	e8udgN1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
A	Helicase_C	e8udgA1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
B	Helicase_C	e8udgB1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)
C	Helicase_C	e8udgC1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F: Helicase_C	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth H], F [auth M]	Heavy Chain	IGHV1	-	hemagglutinin, hemagglutinin \| hemagglutinin	SAbDab (2026-04-24)
E [auth L], G [auth N]	Light Chain	IGLV2	Lambda	hemagglutinin, hemagglutinin \| hemagglutinin	SAbDab (2026-04-24)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth H], F [auth M]	S1V2-72 heavy chain	-	-	-
E [auth L], G [auth N]	S1V2-72 light chain	-	-	-
A, B, C	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, B, C	IPR001364	Haemagglutinin, influenzavirus A/B	Family
A, B, C	IPR008980	Viral capsid/haemagglutinin protein	Homologous Superfamily
A, B, C	IPR000386	Haemagglutinin, influenzavirus B	Family
A, B, C	IPR013828	Haemagglutinin, HA1 chain, alpha/beta domain superfamily	Homologous Superfamily

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.