4GAJ | pdb_00004gaj

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth L]	V-set	e4gajL1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: V-set	ECOD (develop294)
A [auth H]	SmpA_OmlA	e4gajH1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: SmpA_OmlA	ECOD (develop294)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth L]	AP33 Fab, anti-hepatitis C virus (HCV) envelope glycoprotein E2,	L-KAPPA	Mus musculus (house mouse)	IGKV3-1001, IGKJ101, IGKJ102, IGKC01, IGKC*02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
A [auth H]	AP33 Fab, anti-hepatitis C virus (HCV) envelope glycoprotein E2,	VH-CH1	Mus musculus (house mouse)	IGHV3-802, IGHJ401, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV3	Kappa	genome polyprotein	SAbDab (2026-03-20)
A [auth H]	Heavy Chain	IGHV3	-	genome polyprotein	SAbDab (2026-03-20)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth P]	Genome polyprotein	-	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 symbiont entry into host cell symbiont entry into host	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 host intracellular membrane-bounded organelle host cell endoplasmic reticulum host cell membrane host intracellular organelle host cell endomembrane system 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 host intracellular membrane-bounded organelle host cell endoplasmic reticulum host cell membrane host intracellular organelle host cell endomembrane system host cell endoplasmic reticulum membrane virion component viral membrane viral envelope virion membrane
B [auth L]	NEUTRALIZING ANTIBODY AP33 LIGHT CHAIN	-	-	-
A [auth H]	NEUTRALIZING ANTIBODY AP33 HEAVY CHAIN	-	-	-

Chains	Accession	Name	Type
C [auth P]	IPR002519	Hepatitis C virus, Envelope glycoprotein E1	Domain
C [auth P]	IPR002531	Hepatitis C virus, Non-structural protein E2/NS1	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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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