8K4Q | pdb_00008k4q

Crystal structure of nanobody HuNb103 bound to human interleukin-4 receptor subunit alpha

External Resource: Annotation

Domain Annotation: SCOP2 Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Fibronectin type III	8055135	3002063	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Fibronectin type III	8055519	3002063	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Fibronectin type III	8055135	3002063	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Fibronectin type III	8055519	3002063	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, D	Heavy Chain	IGHV3	-	interleukin-4 receptor subunit alpha	SAbDab (2025-11-07)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF09238	Interleukin-4 receptor alpha chain, N-terminal (IL4Ra_N)	Interleukin-4 receptor alpha chain, N-terminal	Members of this family are related in overall topology to fibronectin type III modules and fold into a sandwich comprising seven antiparallel beta sheets arranged in a three-strand and a four-strand beta-pleated sheet. They are required for binding o ...	Members of this family are related in overall topology to fibronectin type III modules and fold into a sandwich comprising seven antiparallel beta sheets arranged in a three-strand and a four-strand beta-pleated sheet. They are required for binding of interleukin-4 to the receptor alpha chain, which is a crucial event for the generation of a Th2-dominated early immune response [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	IL-4R nanobody HuNb103	-	-	-
A, C	Interleukin-4 receptor subunit alpha	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity interleukin-4 receptor activity	production of molecular mediator involved in inflammatory response multicellular organismal process response to stimulus defense response response to stress inflammatory response cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway production of molecular mediator involved in inflammatory response multicellular organismal process response to stimulus defense response response to stress inflammatory response cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway 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 adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity immune response immune system process B cell mediated immunity leukocyte mediated immunity immunoglobulin mediated immune response adaptive immune response immune effector process regulation of macrophage activation positive regulation of macrophage activation regulation of leukocyte activation cell activation positive regulation of biological process regulation of cell activation myeloid leukocyte activation leukocyte activation macrophage activation positive regulation of cell activation positive regulation of leukocyte activation positive regulation of multicellular organismal process regulation of immune system process regulation of multicellular organismal process positive regulation of immune system process positive regulation of cellular process establishment of organelle localization regulation of immune effector process regulation of localization regulated exocytosis regulation of myeloid leukocyte mediated immunity cell activation involved in immune response leukocyte degranulation myeloid leukocyte mediated immunity vesicle-mediated transport localization positive regulation of leukocyte degranulation positive regulation of regulated secretory pathway establishment of localization in cell positive regulation of mast cell degranulation vacuolar localization mast cell degranulation establishment of localization regulation of secretion regulation of leukocyte mediated immunity exocytosis lysosome localization cellular localization transport positive regulation of secretion by cell positive regulation of exocytosis regulation of mast cell degranulation regulation of regulated secretory pathway secretion by cell regulation of secretion by cell positive regulation of secretion organelle localization leukocyte activation involved in immune response mast cell activation positive regulation of immune effector process regulation of leukocyte degranulation mast cell mediated immunity secretion regulation of transport export from cell regulation of vesicle-mediated transport myeloid cell activation involved in immune response mast cell activation involved in immune response positive regulation of transport regulation of exocytosis regulation of alpha-beta T cell activation positive regulation of T cell differentiation alpha-beta T cell differentiation involved in immune response regulation of cell development multicellular organism development type 2 immune response positive regulation of immune response T cell activation cell differentiation regulation of type 2 immune response regulation of T-helper cell differentiation alpha-beta T cell activation positive regulation of CD4-positive, alpha-beta T cell differentiation T-helper cell differentiation positive regulation of cell development regulation of response to stimulus regulation of leukocyte cell-cell adhesion positive regulation of alpha-beta T cell differentiation regulation of developmental process cell development positive regulation of leukocyte cell-cell adhesion CD4-positive, alpha-beta T cell differentiation positive regulation of T-helper cell differentiation positive regulation of cell-cell adhesion regulation of T cell differentiation positive regulation of lymphocyte activation alpha-beta T cell differentiation T cell activation involved in immune response positive regulation of cell differentiation regulation of T-helper 2 cell differentiation regulation of cell-cell adhesion hemopoiesis regulation of cell adhesion positive regulation of T-helper 2 cell differentiation regulation of CD4-positive, alpha-beta T cell activation regulation of lymphocyte activation regulation of leukocyte differentiation mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation CD4-positive, alpha-beta T cell differentiation involved in immune response positive regulation of developmental process anatomical structure development T cell differentiation developmental process positive regulation of T cell activation positive regulation of alpha-beta T cell activation regulation of immune response leukocyte differentiation cellular developmental process regulation of CD4-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation lymphocyte activation leukocyte cell-cell adhesion positive regulation of response to stimulus positive regulation of CD4-positive, alpha-beta T cell activation cell adhesion cell-cell adhesion alpha-beta T cell activation involved in immune response positive regulation of hemopoiesis CD4-positive, alpha-beta T cell activation T-helper 2 cell differentiation lymphocyte activation involved in immune response regulation of lymphocyte differentiation regulation of multicellular organismal development positive regulation of cell adhesion regulation of T cell activation T cell differentiation involved in immune response positive regulation of type 2 immune response regulation of hemopoiesis positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation T-helper 1 type immune response T-helper 1 cell differentiation biological process involved in interspecies interaction between organisms response to other organism defense response to protozoan response to external stimulus response to biotic stimulus response to protozoan defense response to other organism response to external biotic stimulus interleukin-4-mediated signaling pathway response to interleukin-4 cellular response to interleukin-4 homeostatic process adaptive thermogenesis positive regulation of metabolic process multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis metabolic process regulation of metabolic process positive regulation of macromolecule biosynthetic process positive regulation of biosynthetic process regulation of cytokine production cytokine production positive regulation of macromolecule metabolic process regulation of biosynthetic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of chemokine production regulation of gene expression biosynthetic process positive regulation of gene expression chemokine production positive regulation of chemokine production regulation of macromolecule biosynthetic process macromolecule metabolic process positive regulation of cytokine production immunoglobulin production positive regulation of immunoglobulin production production of molecular mediator of immune response regulation of immunoglobulin production positive regulation of production of molecular mediator of immune response regulation of production of molecular mediator of immune response negative regulation of cell adhesion negative regulation of T cell differentiation negative regulation of leukocyte differentiation negative regulation of immune effector process regulation of T-helper 1 type immune response negative regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of T cell activation negative regulation of leukocyte cell-cell adhesion negative regulation of cell-cell adhesion regulation of T-helper 1 cell differentiation negative regulation of multicellular organismal process negative regulation of cell differentiation negative regulation of developmental process negative regulation of cell development negative regulation of T-helper 1 cell differentiation negative regulation of alpha-beta T cell activation negative regulation of biological process negative regulation of hemopoiesis negative regulation of T-helper 1 type immune response regulation of adaptive immune response negative regulation of immune response negative regulation of adaptive immune response negative regulation of CD4-positive, alpha-beta T cell activation negative regulation of lymphocyte differentiation negative regulation of CD4-positive, alpha-beta T cell differentiation negative regulation of leukocyte activation negative regulation of alpha-beta T cell differentiation negative regulation of lymphocyte activation regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of cellular process negative regulation of response to stimulus negative regulation of T-helper cell differentiation negative regulation of cell activation negative regulation of immune system process positive regulation of cellular component organization regulation of cellular component organization regulation of syncytium formation by plasma membrane fusion cell-cell fusion muscle cell differentiation myotube differentiation cellular component organization muscle structure development cellular component organization or biogenesis syncytium formation positive regulation of myoblast fusion myoblast fusion regulation of myoblast fusion positive regulation of syncytium formation by plasma membrane fusion syncytium formation by plasma membrane fusion anatomical structure morphogenesis anatomical structure formation involved in morphogenesis striated muscle cell differentiation	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure intracellular membraneless organelle intracellular organelle centrosome microtubule organizing center cytoskeleton centriolar satellite cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure intracellular membraneless organelle intracellular organelle centrosome microtubule organizing center cytoskeleton centriolar satellite organelle membraneless organelle microtubule cytoskeleton membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein-containing complex receptor complex extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR003531	Short hematopoietin receptor, family 1, conserved site	Conserved Site
A, C	IPR003961	Fibronectin type III	Domain
A, C	IPR015319	Interleukin-4 receptor alpha, N-terminal	Domain
A, C	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, C	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, C	Pharos: P24394	renal cell carcinoma IgE responsiveness, atopic asthma chromophobe renal cell carcinoma collecting duct carcinoma papillary renal cell carcinoma sarcomatoid renal cell carcinoma atopic eczema HIV infectious disease ovarian cancer peripheral arterial disease renal carcinoma spina bifida allergic rhinitis breast cancer renal cell carcinoma IgE responsiveness, atopic asthma chromophobe renal cell carcinoma collecting duct carcinoma papillary renal cell carcinoma sarcomatoid renal cell carcinoma atopic eczema HIV infectious disease ovarian cancer peripheral arterial disease renal carcinoma spina bifida allergic rhinitis breast cancer clear cell renal carcinoma gastric carcinoma lymphoplasmacytic lymphoma MALT lymphoma pancreatic ductal adenocarcinoma primary biliary cholangitis susceptibility to HIV infection HIV Coinfection lung cancer malignant mesothelioma osteosarcoma psoriasis lung carcinoma malignant pancreatic neoplasm

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.