Annotations: 9O3D

Crystal structure of broadly neutralizing antibody HEPC108 in complex with Hepatitis C virus envelope glycoprotein E2 ectodomain

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)
G	Cofilin_ADF	e9o3dG1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Cofilin_ADF	ECOD (v295)
K	Cofilin_ADF	e9o3dK1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Cofilin_ADF	ECOD (v295)
C	Cofilin_ADF	e9o3dC1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Cofilin_ADF	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, F, J, L	Light Chain	IGKV1	Kappa	envelope glycoprotein e2	SAbDab (2026-06-26)
A, E, H, I	Heavy Chain	IGHV1	-	envelope glycoprotein e2	SAbDab (2026-06-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, D, G, K	Envelope Glycoprotein E2	RNA binding binding nucleic acid binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell 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 import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell 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 import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport 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 symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host immune response symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host process symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response modulation of process of another organism	host cellular component host intracellular part cellular anatomical structure host cell cytoplasm host cell part host cell lipid droplet host intracellular region other organism part host cell cytoplasm part virion component virion membrane host intracellular membrane-bounded organelle host cell membrane host cell mitochondrion host cellular component host intracellular part cellular anatomical structure host cell cytoplasm host cell part host cell lipid droplet host intracellular region other organism part host cell cytoplasm part virion component virion membrane host intracellular membrane-bounded organelle host cell membrane host cell mitochondrion host intracellular organelle host cell mitochondrial envelope host cell mitochondrial membrane host cell endoplasmic reticulum host cell endomembrane system host cell endoplasmic reticulum membrane host cell nucleus viral membrane viral envelope protein-containing complex ribonucleoprotein complex viral nucleocapsid viral capsid
B, F, J, L	HEPC108 Fab Light Chain	-	-	-
A, E, H, I	HEPC108 Fab Heavy Chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C, D, G, K	IPR002519	Hepatitis C virus, Envelope glycoprotein E1	Domain
C, D, G, K	IPR002531	Hepatitis C virus, Non-structural protein E2/NS1	Domain

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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.