Annotations: 8BLQ

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	4-helical cytokines	8039590	3001717	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E		e8blqE1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)
D		e8blqD1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)
C		e8blqC1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)
B		e8blqB1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)
A		e8blqA1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E	Heavy Chain	IGHV1	-	interleukin-13, human	SAbDab (2026-04-10)
C	Light Chain	IGLV3	Lambda	interleukin-13, human	SAbDab (2026-04-10)
B	Light Chain	IGKV15	Kappa	interleukin-13, human	SAbDab (2026-04-10)
A	Heavy Chain	IGHV2	-	-	SAbDab (2026-04-10)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
E	Tralokinumab	IL13	Therapeutic SAbDab (2026-04-10)
C	Tralokinumab	IL13	Therapeutic SAbDab (2026-04-10)
B	Romilkimab	IL13, IL4	Therapeutic SAbDab (2026-04-10)
A	Romilkimab	IL13, IL4	Therapeutic SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D	PF03487	Interleukin-13 (IL13)	Interleukin-13		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E	RefAb, heavy chain	-	-	-
D	Interleukin-13, human	protein binding binding signaling receptor binding cytokine receptor binding interleukin-13 receptor binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity	multicellular organismal process regulation of cellular process cellular developmental process regulation of developmental process negative regulation of biological process respiratory tube development regulation of cell differentiation negative regulation of lung ciliated cell differentiation epithelial cell differentiation regulation of epithelial cell differentiation multicellular organism development cell differentiation anatomical structure development negative regulation of cellular process multicellular organismal process regulation of cellular process cellular developmental process regulation of developmental process negative regulation of biological process respiratory tube development regulation of cell differentiation negative regulation of lung ciliated cell differentiation epithelial cell differentiation regulation of epithelial cell differentiation multicellular organism development cell differentiation anatomical structure development negative regulation of cellular process lung development respiratory system development regulation of multicellular organismal process negative regulation of cell differentiation system development developmental process epithelium development regulation of biological process regulation of multicellular organismal development negative regulation of epithelial cell differentiation lung ciliated cell differentiation tube development negative regulation of developmental process biological regulation animal organ development regulation of lung ciliated cell differentiation lung epithelium development tissue development multi-ciliated epithelial cell differentiation lung epithelial cell differentiation lung cell differentiation cellular process columnar/cuboidal epithelial cell differentiation negative regulation of multicellular organismal process regulation of transforming growth factor beta production regulation of cytokine production cytokine production transforming growth factor beta production negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of metabolic process negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process negative regulation of transforming growth factor beta production regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process regulation of localization regulation of proton transport transport regulation of transport proton transmembrane transport monoatomic ion transmembrane transport regulation of monoatomic ion transport regulation of monoatomic ion transmembrane transport establishment of localization monoatomic cation transmembrane transport transmembrane transport localization regulation of transmembrane transport monoatomic ion transport regulation of monoatomic cation transmembrane transport monoatomic cation transport 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 immune system process positive regulation of leukocyte activation positive regulation of multicellular organismal process regulation of immune system process positive regulation of immune system process positive regulation of cellular process response to stimulus response to chemical response to selenium ion immune response lobar bronchus epithelium development lung secretory cell differentiation positive regulation of developmental process positive regulation of cell differentiation regulation of lung goblet cell differentiation bronchus development lobar bronchus development lung goblet cell differentiation positive regulation of epithelial cell differentiation positive regulation of lung goblet cell differentiation positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of gene expression positive regulation of biosynthetic process positive regulation of macromolecule metabolic process establishment of organelle localization regulation of immune effector process regulated exocytosis regulation of myeloid leukocyte mediated immunity cell activation involved in immune response leukocyte degranulation myeloid leukocyte mediated immunity vesicle-mediated transport positive regulation of leukocyte degranulation positive regulation of regulated secretory pathway establishment of localization in cell leukocyte mediated immunity positive regulation of mast cell degranulation vacuolar localization mast cell degranulation immune effector process regulation of secretion regulation of leukocyte mediated immunity exocytosis lysosome localization cellular localization 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 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 cellular response to stimulus interleukin-13-mediated signaling pathway cell surface receptor signaling pathway signaling cellular response to interleukin-13 response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to interleukin-13 cellular response to cytokine stimulus signal transduction regulation of defense response regulation of response to external stimulus negative regulation of inflammatory response defense response negative regulation of response to stimulus response to external stimulus regulation of inflammatory response regulation of response to stimulus response to stress negative regulation of response to external stimulus regulation of response to stress negative regulation of defense response inflammatory response biological process involved in interspecies interaction between organisms response to other organism response to external biotic stimulus response to nematode response to biotic stimulus response to alcohol response to oxygen-containing compound response to ethanol regulation of complement-dependent cytotoxicity negative regulation of complement-dependent cytotoxicity regulation of cell killing complement-dependent cytotoxicity negative regulation of cell killing cell killing homeostatic process adaptive thermogenesis multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis establishment of protein localization regulation of protein localization positive regulation of establishment of protein localization protein localization to extracellular region positive regulation of protein transport intracellular protein localization regulation of establishment of protein localization establishment of protein localization to extracellular region regulation of protein transport protein secretion positive regulation of protein secretion regulation of protein secretion protein transport macromolecule localization positive regulation of protein localization response to mechanical stimulus response to abiotic stimulus cellular response to mechanical stimulus cellular response to abiotic stimulus cellular response to external stimulus cellular response to environmental stimulus 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 interleukin-10 production regulation of interleukin-10 production positive regulation of interleukin-10 production positive regulation of cytokine production cell population proliferation regulation of smooth muscle cell proliferation positive regulation of cell population proliferation smooth muscle cell proliferation positive regulation of smooth muscle cell proliferation regulation of cell population proliferation muscle cell proliferation regulation of calcium ion transport positive regulation of cation transmembrane transport positive regulation of calcium ion transport calcium ion transport metal ion transport regulation of calcium ion transmembrane transport intercellular transport positive regulation of monoatomic ion transport positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport positive regulation of monoatomic ion transmembrane transport positive regulation of release of sequestered calcium ion into cytosol regulation of metal ion transport calcium ion transmembrane import into cytosol regulation of release of sequestered calcium ion into cytosol release of sequestered calcium ion into cytosol calcium ion transmembrane transport positive regulation of B cell proliferation lymphocyte activation leukocyte proliferation positive regulation of lymphocyte activation regulation of B cell proliferation lymphocyte proliferation regulation of B cell activation positive regulation of mononuclear cell proliferation regulation of lymphocyte proliferation regulation of leukocyte proliferation B cell activation positive regulation of lymphocyte proliferation B cell proliferation positive regulation of B cell activation mononuclear cell proliferation positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation regulation of lymphocyte activation negative regulation of endothelial cell apoptotic process negative regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death negative regulation of apoptotic process endothelial cell apoptotic process apoptotic process programmed cell death regulation of endothelial cell apoptotic process response to nicotine positive regulation of pancreatic stellate cell proliferation fibroblast proliferation pancreatic stellate cell proliferation regulation of fibroblast proliferation positive regulation of fibroblast proliferation regulation of pancreatic stellate cell proliferation positive regulation of DNA-templated transcription RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II primary metabolic process positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process regulation of DNA-templated transcription response to lipid response to lipopolysaccharide response to bacterium response to molecule of bacterial origin leukocyte activation involved in inflammatory response microglial cell activation glial cell activation neuroinflammatory response	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm extracellular region
C	RefAb, light chain	-	-	-
B	CODV-Fab, light chain	-	-	-
A	CODV-Fab, heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D	IPR001325	Interleukin-4/interleukin-13	Family
D	IPR018096	Interleukin-4/interleukin-13, conserved site	Conserved Site
D	IPR020470	Interleukin-13	Family
D	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D	Pharos: P35225	allergic rhinitis psoriasis atopic eczema allergic disease autoimmune hepatitis renal cell carcinoma asthma pneumonia sinusitis Hodgkins lymphoma hyperplasia Arthritis, Experimental lung disease papillary renal cell carcinoma chromophobe renal cell carcinoma allergic rhinitis psoriasis atopic eczema allergic disease autoimmune hepatitis renal cell carcinoma asthma pneumonia sinusitis Hodgkins lymphoma hyperplasia Arthritis, Experimental lung disease papillary renal cell carcinoma chromophobe renal cell carcinoma sarcomatoid renal cell carcinoma psoriatic arthritis drug allergy alopecia areata pulmonary fibrosis collecting duct carcinoma renal carcinoma dermatitis sarcoidosis helminthiasis arthritic joint disease idiopathic interstitial pneumonia inflammatory bowel disease autism common cold dermatitis, atopic Huntington disease inherited susceptibility to asthma clear cell renal carcinoma pustulosis palmaris et plantaris rhinitis hypereosinophilic syndrome autoimmune disease pneumonitis 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.