Annotations: 4QEX

Crystal structure of PfEBA-175 RII in complex with a Fab fragment from inhibitory antibody R217

External Resource: Annotation

Domain Annotation: ECOD Classification
IMGT Antibody Annotation
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)
F [auth I]	TIR	e4qexI1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
C [auth H]	TIR	e4qexH1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
E [auth M]	TIR	e4qexM1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
B [auth L]	TIR	e4qexL1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
D [auth B]	TIR	e4qexB1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
D [auth B]	LRR_1,LRR_8	e4qexB2	A: alpha arrays	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: LRR_1,LRR_8	ECOD (v295.2)
A	TIR	e4qexA1	A: alpha arrays	X: HTH	H: Toll/Interleukin receptor TIR domain	T: Toll/Interleukin receptor TIR domain	F: TIR	ECOD (v295.2)
A		e4qexA3	A: alpha arrays	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v295.2)

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
C [auth H], F [auth I]	Antibody	VH-CH1	Mus musculus (house mouse)	IGHV1-2601, IGHJ401, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202633-0)
B [auth L], E [auth M]	Antibody	L-KAPPA	Mus musculus (house mouse)	IGKV3-1001, IGKJ401, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202633-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth H], F [auth I]	Heavy Chain	IGHV1	-	erythrocyte-binding antigen-175	SAbDab (2026-08-28)
B [auth L], E [auth M]	Light Chain	IGKV3	Kappa	erythrocyte-binding antigen-175	SAbDab (2026-08-28)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth H], F [auth I]	Antibody Heavy Chain	-	-	-
B [auth L], E [auth M]	Antibody Light Chain	-	-	-
A, D [auth B]	Erythrocyte-binding antigen-175	host cell surface binding binding host cell surface receptor binding	-	cellular anatomical structure membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth B]	IPR043057	Erythrocyte binding antigen 175, C-terminal domain superfamily	Homologous Superfamily
A, D [auth B]	IPR008602	Duffy-antigen binding domain	Domain
A, D [auth B]	IPR021620	Erythrocyte binding antigen 175, C-terminal	Domain
A, D [auth B]	IPR042202	Duffy-antigen binding superfamily	Homologous Superfamily

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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.