4HWB | pdb_00004hwb

Crystal structure of ectodomain 3 of the IL-13 receptor alpha 1 in complex with a human neutralizing monoclonal antibody fragment

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
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)
C [auth L]	d4hwbl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth H]	d4hwbh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth L]	HTH_3	e4hwbL1	A: a/b three-layered sandwiches	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: HTH_3	ECOD (v294.1)
B [auth H]	HTH_3	e4hwbH1	A: a/b three-layered sandwiches	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: HTH_3	ECOD (v294.1)
A	HTH_3	e4hwbA1	A: a/b three-layered sandwiches	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: HTH_3	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	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
C [auth L]	FAB-GAMMA-1_KAPPA	L-KAPPA	Homo sapiens (human)	IGKV3-2001, IGKJ101, IGKC*01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202611-0)
B [auth H]	FAB-GAMMA-1_KAPPA	VH-CH1	Homo sapiens (human)	IGHV5-5101, IGHV5-5103, IGHJ401, IGHJ402, IGHJ403, IGHG101, IGHG102, IGHG104	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202611-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L]	Light Chain	IGKV3	Kappa	interleukin-13 receptor subunit alpha-1	SAbDab (2026-03-27)
B [auth H]	Heavy Chain	IGHV5	-	interleukin-13 receptor subunit alpha-1	SAbDab (2026-03-27)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
C [auth L]	Eblasakimab	IL13RA1/CD213A1	Therapeutic SAbDab (2026-03-27)
B [auth H]	Eblasakimab	IL13RA1/CD213A1	Therapeutic SAbDab (2026-03-27)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L]	Fab light chain	-	-	-
B [auth H]	Fab heavy chain	-	-	-
A	Interleukin-13 receptor subunit alpha-1	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity protein binding binding cytokine binding	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus signal transduction regulation of immune effector process immunoglobulin production positive regulation of biological process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of immune effector process regulation of immune system process positive regulation of macromolecule metabolic process positive regulation of immune system process positive regulation of cellular process positive regulation of immunoglobulin production regulation of biosynthetic process production of molecular mediator of immune response regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process immune effector process regulation of gene expression biosynthetic process regulation of immunoglobulin production positive regulation of gene expression immune system process positive regulation of production of molecular mediator of immune response regulation of macromolecule biosynthetic process metabolic process regulation of production of molecular mediator of immune response macromolecule metabolic process regulation of metabolic process	protein-containing complex receptor complex cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane interleukin-13 receptor complex plasma membrane protein complex plasma membrane signaling receptor complex membrane protein complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015321	Type I cytokine receptor, cytokine-binding domain	Domain
A	IPR003961	Fibronectin type III	Domain
A	IPR040566	Interleukin-13 receptor subunit alpha-1, Ig-like domain	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR003532	Short hematopoietin receptor, family 2, conserved site	Conserved Site
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P78552	pancreatic intraductal papillary-mucinous neoplasm psoriasis astrocytic tumor breast cancer gastric carcinoma large cell medulloblastoma lymphoplasmacytic lymphoma medulloblastoma pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma atypical teratoid rhabdoid tumor esophageal adenocarcinoma glioblastoma lung adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm psoriasis astrocytic tumor breast cancer gastric carcinoma large cell medulloblastoma lymphoplasmacytic lymphoma medulloblastoma pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma atypical teratoid rhabdoid tumor esophageal adenocarcinoma glioblastoma lung adenocarcinoma malignant ependymoma osteosarcoma pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma type 2 diabetes mellitus B-cell chronic lymphocytic leukemia gastric cancer IgA glomerulonephritis lung cancer malignant glioma 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.