Annotations: 3JCX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	ubiquitin	e3jcxA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: RIFT-related	T: acid protease	F: ubiquitin	ECOD (v294.1)
B [auth H]	ubiquitin	e3jcxH1	A: a/b three-layered sandwiches	X: Rossmann-like	H: RIFT-related	T: acid protease	F: ubiquitin	ECOD (v294.1)
C [auth L]	ubiquitin	e3jcxL1	A: a/b three-layered sandwiches	X: Rossmann-like	H: RIFT-related	T: acid protease	F: ubiquitin	ECOD (v294.1)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
B [auth H]	Fab E	VH	Rattus norvegicus (Norway rat)	IGHV2-3201, IGHJ301	V-DOMAIN VH	IG	FV-HEAVY_KAPPA	IMGT (202612-0)
C [auth L]	Fab E	V-KAPPA	Rattus norvegicus (Norway rat)	IGKV6S1001, IGKJ501	V-DOMAIN V-KAPPA	IG	FV-HEAVY_KAPPA	IMGT (202612-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV2	-	capsid protein 2	SAbDab (2026-03-27)
C [auth L]	Light Chain	IGKV6	Kappa	capsid protein 2	SAbDab (2026-03-27)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
B [auth H]	Anivovetmab	Minor Capsid VP2 (Canine)	Therapeutic SAbDab (2026-03-27)
C [auth L]	Anivovetmab	Minor Capsid VP2 (Canine)	Therapeutic SAbDab (2026-03-27)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Capsid protein 2	structural molecule activity	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 viral process symbiont entry into host 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 viral process 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 virion attachment to host cell adhesion of symbiont to host cell adhesion of symbiont to host symbiont-mediated disruption of host anatomical structure symbiont entry into host cell via permeabilization of host membrane symbiont-mediated disruption of host cellular anatomical structure symbiont-mediated perturbation of host membrane disruption of anatomical structure in another organism	viral capsid icosahedral viral capsid virion component T=1 icosahedral viral capsid
B [auth H]	Fab E heavy chain	-	-	-
C [auth L]	Fab E light chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR016184	Capsid/spike protein, ssDNA virus	Homologous Superfamily
A	IPR001403	Coat protein VP1/VP2, Parvovirus	Domain
A	IPR036952	Parvovirus coat protein VP1/VP2	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.