4JZJ | pdb_00004jzj

Crystal Structure of Receptor-Fab Complex

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Thera-SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
F [auth L]	d4jzjl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
F [auth L]	d4jzjl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth B]	d4jzjb2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth B]	d4jzjb1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
E [auth H]	d4jzjh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth A]	d4jzja_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth L]	Cys_knot	e4jzjL1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: Cys_knot	ECOD (develop294)
D [auth B]	Cys_knot	e4jzjB1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: Cys_knot	ECOD (develop294)
E [auth H]	Cys_knot	e4jzjH1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: Cys_knot	ECOD (develop294)
C [auth A]	Cys_knot	e4jzjA1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: Cys_knot	ECOD (develop294)
B [auth D]	CBM_4_9	e4jzjD1	A: alpha bundles	X: jelly-roll	H: Galactose-binding domain-like	T: Galactose-binding domain-like	F: CBM_4_9	ECOD (develop294)
A [auth C]		e4jzjC1	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F:	ECOD (develop294)
A [auth C]	Cys_knot	e4jzjC3	A: alpha bundles	X: DEATH domain	H: HTH	T: winged helix domain	F: Cys_knot	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth D]	2.60.40.3850	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
B [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth C]	2.60.40.3850	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
A [auth C]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

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
D [auth B], F [auth L]	Fab	L-KAPPA	Homo sapiens (human)	IGKV4-101, IGKJ201, IGKC*01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)
C [auth A], E [auth H]	Fab	VH-CH1	Homo sapiens (human)	IGHV5-5101, IGHV5-5102, IGHV5-5103, IGHV5-10-104, IGHJ601, IGHJ602, IGHG101, IGHG102, IGHG104, IGHG105	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth B], F [auth L]	Light Chain	IGKV4	Kappa	interleukin-3 receptor subunit alpha	SAbDab (2026-03-20)
C [auth A], E [auth H]	Heavy Chain	IGHV5	-	interleukin-3 receptor subunit alpha	SAbDab (2026-03-20)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
D [auth B], F [auth L]	Bexatamig	IL3RA/CD123, NCR1/NKP46/NKp46/LY94/CD335	Therapeutic SAbDab (2026-03-20)
C [auth A], E [auth H]	Talacotuzumab	IL3RA/CD123, NCR1/NKP46/NKp46/LY94/CD335	Therapeutic SAbDab (2026-03-20)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], B [auth D]	PF18611	IL-3 receptor alpha chain N-terminal domain (IL3Ra_N)	IL-3 receptor alpha chain N-terminal domain	Interleukin-3 (IL-3) is an activated T cell product that bridges innate and adaptive immunity and contributes to several immunopathologies. Structure of IL-3 receptor alpha chain (IL3Ra) in complex with the anti-leukemia antibody CSL362 reveals that ...	Interleukin-3 (IL-3) is an activated T cell product that bridges innate and adaptive immunity and contributes to several immunopathologies. Structure of IL-3 receptor alpha chain (IL3Ra) in complex with the anti-leukemia antibody CSL362 reveals that the N-terminal domain (NTD), a domain also present in the granulocyte-macrophage colony-stimulating factor (GM-CSF), contains the CSL362 binding epitope. Furthermore, NTD of IL3Ra adopts a typical fibronectin type III (FnIII) fold [1].	Domain
A [auth C], B [auth D]	PF09240	Interleukin-6 receptor alpha chain, binding (IL6Ra-bind)	Interleukin-6 receptor alpha chain, binding	Members of this family adopt a structure consisting of an immunoglobulin-like beta-sandwich, with seven strands in two beta-sheets, in a Greek-key topology. They are required for binding to the cytokine Interleukin-6 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth B], F [auth L]	Fab Light Chain	-	-	-
C [auth A], E [auth H]	Fab Heavy Chain	-	-	-
A [auth C], B [auth D]	Interleukin-3 receptor subunit alpha	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity protein binding binding cytokine binding interleukin-3 receptor activity	regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling response to cytokine regulation of biological process cell population proliferation regulation of cellular process positive regulation of cell population proliferation regulation of cell population proliferation biological regulation positive regulation of biological process cellular process positive regulation of cellular process cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction interleukin-3-mediated signaling pathway	protein-containing complex receptor complex cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C], B [auth D]	IPR015321	Type I cytokine receptor, cytokine-binding domain	Domain
A [auth C], B [auth D]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth C], B [auth D]	IPR003532	Short hematopoietin receptor, family 2, conserved site	Conserved Site
A [auth C], B [auth D]	IPR040907	IL-3 receptor alpha chain, N-terminal	Domain
A [auth C], B [auth D]	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth C], B [auth D]	Pharos: P26951	Blastic plasmacytoid dendritic cell neoplasm intellectual disability lung carcinoma schizophrenia cancer interstitial cystitis non-small cell lung carcinoma tuberculosis hematologic disease lung adenocarcinoma ovarian cancer

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.