Annotations: 9B2C

Structure of the Porcine deltacoronavirus (PDCoV) receptor-binding domain bound to the PD33 antibody Fab fragment and the Kappa light chain nanobody

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]	TGFBR3_N	e9b2cH01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: TGFBR3_N	ECOD (v295.2)
C [auth N]	TGFBR3_N	e9b2cN01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: TGFBR3_N	ECOD (v295.2)
B [auth L]	TGFBR3_N	e9b2cL01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: TGFBR3_N	ECOD (v295.2)
A	TGFBR3_N	e9b2cA01	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: TGFBR3_N	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth H]	Heavy Chain	IGHV3	-	spike glycoprotein	SAbDab (2026-09-25)
C [auth N]	Heavy Chain	IGHV1	-	-	SAbDab (2026-09-25)
B [auth L]	Light Chain	IGKV2	Kappa	spike glycoprotein	SAbDab (2026-09-25)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth H]	PD33 Fab heavy chain	-	-	-
C [auth N]	Kappa light chain nanobody	-	-	-
B [auth L]	PD33 Fab kappa light chain	-	-	-
A	Spike glycoprotein	-	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 receptor-mediated virion attachment to host cell 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 membrane organization cellular component organization membrane fusion 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 receptor-mediated virion attachment to host cell 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 membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis symbiont entry into host cell symbiont entry into host endocytosis involved in viral entry into host cell	cellular anatomical structure membrane virion component virion membrane viral membrane viral envelope

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002551	Spike glycoprotein S1, coronavirus	Domain
A	IPR044874	Spike glycoprotein S2, coronavirus, heptad repeat 2	Domain
A	IPR043614	Spike glycoprotein S2, coronavirus, C-terminal	Domain
A	IPR044873	Spike glycoprotein S2, coronavirus, heptad repeat 1	Domain
A	IPR043473	Spike glycoprotein S2 superfamily, coronavirus	Homologous Superfamily
A	IPR043607	Coronavirus spike glycoprotein S1, C-terminal	Domain
A	IPR002552	Spike glycoprotein S2, coronavirus	Domain