Annotations: 1ILR

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth 1]	d1ilr1_	All beta proteins	beta-Trefoil	Cytokine	Interleukin-1 (IL-1)	Interleukin-1 receptor antagonist protein	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth 2]	d1ilr2_	All beta proteins	beta-Trefoil	Cytokine	Interleukin-1 (IL-1)	Interleukin-1 receptor antagonist protein	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth 1]	SCOP2 Family	Interleukin-1 (IL-1)	8029638	4001996	SCOP2 (2022-06-29)
A [auth 1]	SCOP2 Superfamily	Cytokine	8042017	3000648	SCOP2 (2022-06-29)
B [auth 2]	SCOP2B Superfamily	Cytokine	8042017	3000648	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)
A [auth 1]	IL1	e1ilr11	A: beta duplicates or obligate multimers	X: beta-Trefoil (From Topology)	H: beta-Trefoil (From Topology)	T: beta-Trefoil	F: IL1	ECOD (1.6)
B [auth 2]	IL1	e1ilr21	A: beta duplicates or obligate multimers	X: beta-Trefoil (From Topology)	H: beta-Trefoil (From Topology)	T: beta-Trefoil	F: IL1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth 1]	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
B [auth 2]	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth 1], B [auth 2]	PF00340	Interleukin-1 / 18 (IL1)	Interleukin-1 / 18	This family includes interleukin-1 and interleukin-18.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth 1], B [auth 2]	INTERLEUKIN-1 RECEPTOR ANTAGONIST PROTEIN	binding signaling receptor binding signaling receptor inhibitor activity receptor antagonist activity cytokine binding interleukin-1 receptor antagonist activity molecular function inhibitor activity protein binding interleukin-1 binding cytokine receptor binding molecular function regulator activity growth factor binding signaling receptor regulator activity interleukin-1 type I receptor antagonist activity binding signaling receptor binding signaling receptor inhibitor activity receptor antagonist activity cytokine binding interleukin-1 receptor antagonist activity molecular function inhibitor activity protein binding interleukin-1 binding cytokine receptor binding molecular function regulator activity growth factor binding signaling receptor regulator activity interleukin-1 type I receptor antagonist activity interleukin-1, type II receptor binding interleukin-1 receptor binding growth factor receptor binding interleukin-1 type II receptor antagonist activity interleukin-1, type I receptor binding molecular function activator activity cytokine activity receptor ligand activity signaling receptor activator activity	response to stimulus immune response immune system process organic substance metabolic process primary metabolic process metabolic process lipid metabolic process multicellular organismal process regulation of cellular process negative regulation of biological process embryo development negative regulation of cell adhesion regulation of cell-cell adhesion involved in gastrulation heterotypic cell-cell adhesion response to stimulus immune response immune system process organic substance metabolic process primary metabolic process metabolic process lipid metabolic process multicellular organismal process regulation of cellular process negative regulation of biological process embryo development negative regulation of cell adhesion regulation of cell-cell adhesion involved in gastrulation heterotypic cell-cell adhesion multicellular organism development cell adhesion cell-cell adhesion negative regulation of cellular process anatomical structure development regulation of cell-cell adhesion regulation of heterotypic cell-cell adhesion cell-cell adhesion via plasma-membrane adhesion molecules developmental process regulation of biological process cell-cell adhesion involved in gastrulation regulation of cell adhesion biological regulation embryonic morphogenesis gastrulation anatomical structure morphogenesis negative regulation of heterotypic cell-cell adhesion negative regulation of cell-cell adhesion cellular process response to corticosteroid response to organic substance response to lipid response to hormone response to steroid hormone response to chemical response to endogenous stimulus response to glucocorticoid response to organic cyclic compound acute-phase response defense response response to stress inflammatory response acute inflammatory response inflammatory response to antigenic stimulus cellular response to stimulus negative regulation of signaling signaling response to cytokine regulation of signal transduction negative regulation of cell communication cytokine-mediated signaling pathway cell communication negative regulation of interleukin-1-mediated signaling pathway cellular response to cytokine stimulus signal transduction cellular response to organic substance regulation of interleukin-1-mediated signaling pathway regulation of signaling cell surface receptor signaling pathway negative regulation of response to stimulus regulation of cytokine-mediated signaling pathway negative regulation of signal transduction cellular response to interleukin-1 regulation of response to cytokine stimulus cellular response to chemical stimulus negative regulation of response to cytokine stimulus regulation of response to stimulus negative regulation of cytokine-mediated signaling pathway interleukin-1-mediated signaling pathway regulation of cell communication response to interleukin-1 protein localization establishment of protein localization cellular localization nitrogen compound transport transport hormone secretion protein localization to extracellular region peptide secretion localization secretion by cell amide transport signal release cellular macromolecule localization regulation of biological quality secretion regulation of hormone levels organic substance transport establishment of protein localization to extracellular region cell-cell signaling export from cell protein secretion establishment of localization peptide transport protein transport peptide hormone secretion macromolecule localization hormone transport insulin secretion	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle intracellular organelle centrosome microtubule organizing center intracellular anatomical structure extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle intracellular organelle centrosome microtubule organizing center intracellular anatomical structure cytoskeleton intracellular non-membrane-bounded organelle microtubule cytoskeleton non-membrane-bounded organelle cytoplasm cytosol cell periphery plasma membrane membrane nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth 1], B [auth 2]	IPR000975	Interleukin-1 family	Family
A [auth 1], B [auth 2]	IPR003297	Interleukin-1 receptor antagonist/Interleukin-36	Family
A [auth 1], B [auth 2]	IPR020877	Interleukin-1 conserved site	Conserved Site
A [auth 1], B [auth 2]	IPR008996	Cytokine IL1/FGF	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth 1], B [auth 2]	Pharos: P18510	sterile multifocal osteomyelitis with periostitis and pustulosis myocardial infarction rheumatoid arthritis status epilepticus malignant colon neoplasm myositis Schnitzler syndrome anthracosis Fever gout prostate cancer acute liver failure microvascular complications of diabetes, susceptibility to, 4 hereditary diffuse gastric adenocarcinoma multiple sclerosis sterile multifocal osteomyelitis with periostitis and pustulosis myocardial infarction rheumatoid arthritis status epilepticus malignant colon neoplasm myositis Schnitzler syndrome anthracosis Fever gout prostate cancer acute liver failure microvascular complications of diabetes, susceptibility to, 4 hereditary diffuse gastric adenocarcinoma multiple sclerosis pulmonary fibrosis juvenile idiopathic arthritis asthma brain ischemia proteinuria kidney disease autism lung carcinoma benign colon neoplasm pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia gastric neoplasm malignant glioma peripheral neuropathy hepatocellular carcinoma psoriasis cervical cancer idiopathic interstitial pneumonia tuberculosis arthritic joint disease ovarian mucinous adenocarcinoma diarrheal disease esophageal adenocarcinoma pancreatic ductal adenocarcinoma bipolar disorder periodic fever syndrome gastrointestinal mucositis brain injury acquired idiopathic inflammatory myopathy chronic kidney disease skin disease colonic neoplasm interstitial cystitis nephrolithiasis cystic fibrosis obesity disorder ulcerative colitis keratoconus ductal breast carcinoma in situ learning disability atypical teratoid rhabdoid tumor exanthem lung cancer autoimmune disease pancreatic intraductal papillary-mucinous neoplasm malignant ependymoma peripheral nervous system disease gastric cancer glioblastoma malignant pancreatic neoplasm pilocytic astrocytoma cancer cerebrovascular disorder chronic obstructive pulmonary disease spina bifida alopecia areata invasive ductal breast carcinoma delirium transitional cell carcinoma osteosarcoma dysthymic disorder

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.