Annotations: 4KC3

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF15095	e4kc3A1	A: beta duplicates or obligate multimers	X: beta-Trefoil (From Topology)	H: beta-Trefoil (From Topology)	T: beta-Trefoil	F: PF15095	ECOD (1.6)
B	F_UNCLASSIFIED	e4kc3B3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF07679	e4kc3B2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07679	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Interleukin-33	protein binding binding signaling receptor binding cytokine receptor binding interleukin-33 receptor binding molecular function activator activity molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity	regulation of defense response response to stimulus regulation of response to external stimulus negative regulation of inflammatory response negative regulation of biological process regulation of response to wounding response to stress regulation of response to stress response to wounding regulation of biological process regulation of inflammatory response to wounding defense response negative regulation of response to stimulus biological regulation regulation of defense response response to stimulus regulation of response to external stimulus negative regulation of inflammatory response negative regulation of biological process regulation of response to wounding response to stress regulation of response to stress response to wounding regulation of biological process regulation of inflammatory response to wounding defense response negative regulation of response to stimulus biological regulation response to external stimulus regulation of inflammatory response negative regulation of response to wounding negative regulation of inflammatory response to wounding regulation of response to stimulus negative regulation of response to external stimulus inflammatory response to wounding negative regulation of defense response inflammatory response multicellular organismal process regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process regulation of interleukin-5 production positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process interleukin-5 production positive regulation of cellular process regulation of biosynthetic process cellular metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process positive regulation of interleukin-5 production positive regulation of cellular biosynthetic process positive regulation of response to stimulus positive regulation of response to external stimulus positive regulation of inflammatory response positive regulation of defense response interleukin-13 production positive regulation of interleukin-13 production regulation of interleukin-13 production regulation of immune effector process immunoglobulin production negative regulation of cellular metabolic process negative regulation of cellular process regulation of immune system process negative regulation of macromolecule metabolic process negative regulation of immunoglobulin production production of molecular mediator of immune response negative regulation of metabolic process negative regulation of immune effector process negative regulation of cellular biosynthetic process immune effector process negative regulation of production of molecular mediator of immune response negative regulation of gene expression regulation of immunoglobulin production negative regulation of immune system process negative regulation of biosynthetic process immune system process negative regulation of macromolecule biosynthetic process regulation of production of molecular mediator of immune response cellular response to stimulus cell surface receptor signaling pathway signaling interleukin-33-mediated signaling pathway response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction regulation of leukocyte proliferation negative regulation of cell population proliferation cell population proliferation negative regulation of macrophage proliferation leukocyte proliferation negative regulation of leukocyte proliferation macrophage proliferation regulation of cell population proliferation regulation of macrophage proliferation cell death extrinsic apoptotic signaling pathway apoptotic signaling pathway apoptotic process programmed cell death positive regulation of proteasomal protein catabolic process catabolic process positive regulation of protein metabolic process proteolysis involved in protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process macromolecule catabolic process regulation of ubiquitin-dependent protein catabolic process regulation of primary metabolic process positive regulation of ubiquitin-dependent protein catabolic process regulation of proteolysis regulation of proteolysis involved in protein catabolic process modification-dependent macromolecule catabolic process proteolysis protein metabolic process organonitrogen compound catabolic process organonitrogen compound metabolic process regulation of protein metabolic process primary metabolic process proteasomal protein catabolic process protein catabolic process regulation of catabolic process positive regulation of protein catabolic process positive regulation of proteolysis involved in protein catabolic process positive regulation of catabolic process regulation of proteasomal ubiquitin-dependent protein catabolic process modification-dependent protein catabolic process positive regulation of proteolysis regulation of proteasomal protein catabolic process positive regulation of proteasomal ubiquitin-dependent protein catabolic process ubiquitin-dependent protein catabolic process regulation of protein catabolic process positive regulation of glycoprotein metabolic process organonitrogen compound biosynthetic process carbohydrate derivative metabolic process regulation of CD86 production regulation of glycoprotein biosynthetic process positive regulation of glycoprotein biosynthetic process carbohydrate derivative biosynthetic process positive regulation of CD86 production glycoprotein biosynthetic process glycoprotein metabolic process CD86 biosynthetic process regulation of glycoprotein metabolic process protein localization establishment of protein localization cellular localization nitrogen compound transport nucleocytoplasmic transport transport nuclear transport intracellular transport protein localization to nucleus establishment of localization localization import into nucleus establishment of protein localization to organelle protein transport cellular macromolecule localization macromolecule localization protein localization to organelle establishment of localization in cell protein import into nucleus intracellular protein transport regulation of chemokine production chemokine production positive regulation of chemokine production positive regulation of immune effector process positive regulation of immune system process positive regulation of immunoglobulin production positive regulation of production of molecular mediator of immune response type 2 immune response immune response regulation of type II interferon production type II interferon production negative regulation of type II interferon production negative regulation of cytokine production negative regulation of multicellular organismal process negative regulation of locomotion regulation of cell motility regulation of leukocyte migration leukocyte migration negative regulation of leukocyte migration regulation of locomotion regulation of cell migration negative regulation of cell motility cell migration cell motility negative regulation of cell migration locomotion RNA metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription negative regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process nucleic acid metabolic process regulation of DNA-templated transcription negative regulation of RNA metabolic process biological process involved in interspecies interaction between organisms response to other organism defense response to symbiont response to biotic stimulus defense response to virus defense response to other organism response to external biotic stimulus response to virus positive regulation of DNA-templated transcription positive regulation of nucleobase-containing compound metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process regulation of CD80 production positive regulation of CD80 production CD80 biosynthetic process regulation of macrophage activation positive regulation of macrophage activation regulation of leukocyte activation cell activation regulation of cell activation myeloid leukocyte activation leukocyte activation macrophage activation positive regulation of cell activation positive regulation of leukocyte activation interleukin-6 production positive regulation of interleukin-6 production regulation of interleukin-6 production macrophage activation involved in immune response cell activation involved in immune response myeloid cell activation involved in immune response microglial cell activation involved in immune response leukocyte activation involved in inflammatory response leukocyte activation involved in immune response microglial cell activation glial cell activation neuroinflammatory response positive regulation of type 2 immune response positive regulation of immune response regulation of type 2 immune response regulation of immune response adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains 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 T-helper 1 type immune response adaptive immune response 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 regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of nitric-oxide synthase biosynthetic process nitric-oxide synthase biosynthetic process positive regulation of nitric-oxide synthase biosynthetic process regulation of cellular defense response cellular defense response positive regulation of cellular defense response 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 developmental process myeloid leukocyte differentiation cellular developmental process hemopoiesis macrophage differentiation cell development mononuclear cell differentiation myeloid cell differentiation cell differentiation anatomical structure development leukocyte differentiation microglial cell proliferation nervous system development neurogenesis multicellular organism development gliogenesis glial cell proliferation system development positive regulation of MHC class I biosynthetic process regulation of MHC class I biosynthetic process MHC class I biosynthetic process regulation of MHC class II biosynthetic process MHC class II biosynthetic process positive regulation of MHC class II biosynthetic process positive regulation of nervous system development regulation of developmental process regulation of cell differentiation regulation of neurogenesis regulation of gliogenesis positive regulation of gliogenesis regulation of cell development regulation of nervous system development positive regulation of developmental process positive regulation of cell differentiation positive regulation of neurogenesis positive regulation of oligodendrocyte differentiation regulation of multicellular organismal development regulation of glial cell differentiation positive regulation of cell development positive regulation of glial cell differentiation central nervous system development oligodendrocyte differentiation glial cell differentiation regulation of oligodendrocyte differentiation regulation of tumor necrosis factor production positive regulation of tumor necrosis factor superfamily cytokine production tumor necrosis factor superfamily cytokine production positive regulation of tumor necrosis factor production tumor necrosis factor production regulation of tumor necrosis factor superfamily cytokine production regulation of interleukin-4 production positive regulation of interleukin-4 production interleukin-4 production positive regulation of neuroinflammatory response regulation of neuroinflammatory response	intracellular anatomical structure cytoplasm cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle chromosome non-membrane-bounded organelle extracellular region extracellular space membrane-bounded organelle intracellular membrane-bounded organelle transport vesicle intracellular vesicle intracellular anatomical structure cytoplasm cellular anatomical entity intracellular organelle organelle intracellular non-membrane-bounded organelle chromosome non-membrane-bounded organelle extracellular region extracellular space membrane-bounded organelle intracellular membrane-bounded organelle transport vesicle intracellular vesicle endomembrane system cytoplasmic vesicle vesicle nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen
B	Interleukin-1 receptor-like 1	hydrolase activity, acting on glycosyl bonds hydrolase activity NAD+ nucleotidase, cyclic ADP-ribose generating hydrolase activity, hydrolyzing N-glycosyl compounds catalytic activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity interleukin-1 receptor activity interleukin-33 binding protein binding binding hydrolase activity, acting on glycosyl bonds hydrolase activity NAD+ nucleotidase, cyclic ADP-ribose generating hydrolase activity, hydrolyzing N-glycosyl compounds catalytic activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity interleukin-1 receptor activity interleukin-33 binding protein binding binding cytokine binding interleukin-33 receptor activity NAD+ nucleosidase activity	multicellular organismal process regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process regulation of interleukin-5 production positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process interleukin-5 production multicellular organismal process regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process regulation of interleukin-5 production positive regulation of biosynthetic process regulation of cytokine production cytokine production regulation of multicellular organismal process positive regulation of macromolecule metabolic process interleukin-5 production positive regulation of cellular process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression positive regulation of multicellular organismal process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process positive regulation of cytokine production regulation of metabolic process positive regulation of interleukin-5 production positive regulation of cellular biosynthetic process regulation of macrophage activation positive regulation of macrophage activation regulation of leukocyte activation cell activation regulation of cell activation myeloid leukocyte activation leukocyte activation macrophage activation positive regulation of cell activation immune system process positive regulation of leukocyte activation regulation of immune system process positive regulation of immune system process regulation of defense response response to stimulus regulation of response to external stimulus defense response response to external stimulus regulation of inflammatory response positive regulation of response to stimulus positive regulation of response to external stimulus positive regulation of inflammatory response regulation of response to stimulus regulation of response to stress response to stress positive regulation of defense response inflammatory response immune response cellular response to stimulus cell surface receptor signaling pathway signaling interleukin-33-mediated signaling pathway response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of T-helper 1 type immune response regulation of adaptive immune response negative regulation of response to stimulus negative regulation of immune response negative regulation of biological process negative regulation of adaptive immune response T-helper 1 type immune response adaptive immune response 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 regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of immune system process regulation of immune response regulation of chemokine production chemokine production positive regulation of chemokine production developmental process myeloid leukocyte differentiation cellular developmental process hemopoiesis macrophage differentiation cell development mononuclear cell differentiation myeloid cell differentiation cell differentiation anatomical structure development leukocyte differentiation regulation of type II interferon production type II interferon production negative regulation of cellular metabolic process negative regulation of cellular process negative regulation of type II interferon production negative regulation of macromolecule metabolic process negative regulation of metabolic process negative regulation of cytokine production negative regulation of cellular biosynthetic process negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process negative regulation of multicellular organismal process	anchoring junction cell junction cellular anatomical entity focal adhesion cell-substrate junction cell periphery cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol anchoring junction cell junction cellular anatomical entity focal adhesion cell-substrate junction cell periphery cell surface membrane plasma membrane external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR026145	Interleukin-33	Family
B	IPR000157	Toll/interleukin-1 receptor homology (TIR) domain	Domain
B	IPR004074	Interleukin-1 receptor type I/II	Family
B	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B	IPR003599	Immunoglobulin subtype	Domain
B	IPR003598	Immunoglobulin subtype 2	Domain
B	IPR013098	Immunoglobulin I-set	Domain
B	IPR015621	Interleukin-1 receptor family	Family
B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B	IPR035897	Toll/interleukin-1 receptor homology (TIR) domain superfamily	Homologous Superfamily
B	IPR007110	Immunoglobulin-like domain	Domain

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 R01GM133198.