8ENT

Interleukin-21 signaling complex with IL-21R and IL-2Rg

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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)
A	SCOP2B Superfamily	4-helical cytokines	8035273	3001717	SCOP2B (2021-05-27)
D	SCOP2B Superfamily	4-helical cytokines	8035273	3001717	SCOP2B (2021-05-27)
G	SCOP2B Superfamily	4-helical cytokines	8035273	3001717	SCOP2B (2021-05-27)
J	SCOP2B Superfamily	4-helical cytokines	8035273	3001717	SCOP2B (2021-05-27)
C	SCOP2B Superfamily	Fibronectin type III	8055179	3002063	SCOP2B (2021-05-27)
C	SCOP2B Superfamily	Fibronectin type III	8055542	3002063	SCOP2B (2021-05-27)
F	SCOP2B Superfamily	Fibronectin type III	8055542	3002063	SCOP2B (2021-05-27)
F	SCOP2B Superfamily	Fibronectin type III	8055179	3002063	SCOP2B (2021-05-27)
I	SCOP2B Superfamily	Fibronectin type III	8055542	3002063	SCOP2B (2021-05-27)
I	SCOP2B Superfamily	Fibronectin type III	8055179	3002063	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF02372	e8entA1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: PF02372	ECOD (1.6)
D	PF02372	e8entD1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: PF02372	ECOD (1.6)
G	PF02372	e8entG1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: PF02372	ECOD (1.6)
J	PF02372	e8entJ1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: PF02372	ECOD (1.6)
E	F_UNCLASSIFIED	e8entE1	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)
H	F_UNCLASSIFIED	e8entH1	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)
K	F_UNCLASSIFIED	e8entK2	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	F_UNCLASSIFIED	e8entB1	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)
C	PF21605	e8entC2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF21605	ECOD (1.6)
C	PF22012	e8entC1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF22012	ECOD (1.6)
F	PF21605	e8entF1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF21605	ECOD (1.6)
F	PF22012	e8entF2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF22012	ECOD (1.6)
I	PF21605	e8entI1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF21605	ECOD (1.6)
I	PF22012	e8entI2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF22012	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D, G, J	PF02372	Interleukin 15 (IL15)	Interleukin 15	Interleukin-15 (IL-15) is a cytokine that possesses a variety of biological functions, including stimulation and maintenance of cellular immune responses [1]. Structurally these proteins are short-chain 4-helical cytokines.	Domain
C, F, I	PF22012	Cytokine receptor-like factor 2, domain 1 (TSLPR_D1)	Cytokine receptor-like factor 2, domain 1	Cytokine receptor-like factor 2 also known as TSLPR is a receptor for thymic stromal lymphopoietin. It contains two ectodomains with Ig-like topology. This family represents the first of these domains. It also includes domains of interleukin-13 recep ...	Cytokine receptor-like factor 2 also known as TSLPR is a receptor for thymic stromal lymphopoietin. It contains two ectodomains with Ig-like topology. This family represents the first of these domains. It also includes domains of interleukin-13 receptor subunit alpha-2 also known as IL-13RA2 that is known to bind with high affinity to interleukin-13.	Domain
C, F, I	PF21605	Cytokine receptor-like factor 2-like, D2 domain (CRLF2-like_D2)	Cytokine receptor-like factor 2-like, D2 domain	CRLF2 is a receptor for thymic stromal lymphopoietin (TSLP). It forms a functional complex with TSLP and IL7R which is capable of stimulating cell proliferation through activation of STAT3 and STAT5. CRFL2 is implicated in the development of the hema ...	CRLF2 is a receptor for thymic stromal lymphopoietin (TSLP). It forms a functional complex with TSLP and IL7R which is capable of stimulating cell proliferation through activation of STAT3 and STAT5. CRFL2 is implicated in the development of the hematopoietic system [1]. It consists of two FnIII-like domains, D1 and D2. This entry represents the membrane-proximal D2 domain, which displays a an ABE/C'CFG topology with two disulfide bridges [1]. This domain interacts with IL7R D2 domain and forms a compact network of interactions [1]. This domain is also found in the cytokine receptor common subunit gamma (IL2RG), a common subunit for the receptors for a variety of interleukins [2,3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D, G, J	Interleukin-21	protein binding binding molecular function activator activity signaling receptor binding molecular function regulator activity cytokine activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity cytokine receptor binding growth factor receptor binding interleukin-2 receptor binding	regulation of immune effector process lymphocyte mediated immunity positive regulation of leukocyte mediated immunity positive regulation of response to biotic stimulus regulation of cellular process response to stimulus response to biotic stimulus positive regulation of leukocyte mediated cytotoxicity positive regulation of immune response positive regulation of natural killer cell mediated immunity leukocyte mediated immunity regulation of immune system process natural killer cell mediated immunity positive regulation of immune system process regulation of immune effector process lymphocyte mediated immunity positive regulation of leukocyte mediated immunity positive regulation of response to biotic stimulus regulation of cellular process response to stimulus response to biotic stimulus positive regulation of leukocyte mediated cytotoxicity positive regulation of immune response positive regulation of natural killer cell mediated immunity leukocyte mediated immunity regulation of immune system process natural killer cell mediated immunity positive regulation of immune system process regulation of biological process regulation of natural killer cell mediated immunity immune response response to other organism regulation of innate immune response response to external stimulus leukocyte mediated cytotoxicity immune effector process regulation of leukocyte mediated immunity regulation of response to stimulus defense response to other organism positive regulation of defense response natural killer cell mediated cytotoxicity regulation of immune response positive regulation of natural killer cell mediated cytotoxicity regulation of cell killing positive regulation of cell killing regulation of defense response regulation of response to biotic stimulus regulation of natural killer cell mediated cytotoxicity biological process involved in interspecies interaction between organisms regulation of response to external stimulus positive regulation of lymphocyte mediated immunity positive regulation of biological process positive regulation of response to stimulus positive regulation of response to external stimulus response to stress regulation of response to stress innate immune response positive regulation of immune effector process response to external biotic stimulus positive regulation of cellular process positive regulation of innate immune response defense response regulation of leukocyte mediated cytotoxicity biological regulation defense response to symbiont regulation of lymphocyte mediated immunity immune system process cellular process cell killing cellular response to stimulus cell surface receptor signaling pathway via STAT signaling peptidyl-tyrosine modification cell communication peptidyl-amino acid modification phosphate-containing compound metabolic process protein metabolic process signal transduction protein modification process phosphorus metabolic process tyrosine phosphorylation of STAT protein organonitrogen compound metabolic process protein phosphorylation cell surface receptor signaling pathway phosphorylation cellular metabolic process primary metabolic process macromolecule modification metabolic process macromolecule metabolic process peptidyl-tyrosine phosphorylation cell surface receptor signaling pathway via JAK-STAT regulation of inflammatory response positive regulation of inflammatory response inflammatory response developmental process cellular developmental process anatomical structure maturation cell differentiation anatomical structure development cell development cell maturation developmental maturation cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation multicellular organismal process positive regulation of tissue remodeling tissue remodeling positive regulation of multicellular organismal process regulation of multicellular organismal process regulation of tissue remodeling germinal center B cell differentiation mononuclear cell differentiation mature B cell differentiation B cell activation involved in immune response lymphocyte activation cell activation involved in immune response lymphocyte differentiation leukocyte activation B cell differentiation leukocyte activation involved in immune response lymphocyte activation involved in immune response mature B cell differentiation involved in immune response hemopoiesis B cell activation cell activation leukocyte differentiation immunoglobulin production cellular biosynthetic process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of immunoglobulin production regulation of biosynthetic process production of molecular mediator of immune response 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 regulation of immunoglobulin production positive regulation of gene expression positive regulation of production of molecular mediator of immune response regulation of macromolecule biosynthetic process regulation of production of molecular mediator of immune response regulation of metabolic process positive regulation of cellular biosynthetic process positive regulation of phosphorylation positive regulation of phosphate metabolic process regulation of primary metabolic process regulation of phosphate metabolic process positive regulation of protein phosphorylation positive regulation of phosphorus metabolic process regulation of protein metabolic process regulation of phosphorus metabolic process regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of peptidyl-tyrosine phosphorylation positive regulation of protein modification process regulation of tyrosine phosphorylation of STAT protein regulation of peptidyl-tyrosine phosphorylation positive regulation of tyrosine phosphorylation of STAT protein regulation of phosphorylation cytokine production regulation of cytokine production interleukin-17 production regulation of interleukin-17 production positive regulation of interleukin-17 production positive regulation of cytokine production CD4-positive, alpha-beta T cell differentiation CD4-positive, alpha-beta T cell differentiation involved in immune response alpha-beta T cell differentiation involved in immune response alpha-beta T cell differentiation T cell activation involved in immune response alpha-beta T cell activation involved in immune response T cell activation CD4-positive, alpha-beta T cell activation alpha-beta T cell activation T follicular helper cell differentiation T cell differentiation T-helper cell differentiation T cell differentiation involved in immune response positive regulation of B cell proliferation regulation of leukocyte activation regulation of cell activation leukocyte proliferation positive regulation of lymphocyte activation positive regulation of cell activation regulation of B cell proliferation lymphocyte proliferation regulation of B cell activation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation regulation of lymphocyte proliferation regulation of leukocyte proliferation 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 positive regulation of T cell activation positive regulation of T cell proliferation regulation of leukocyte cell-cell adhesion positive regulation of leukocyte cell-cell adhesion leukocyte cell-cell adhesion positive regulation of cell-cell adhesion cell adhesion cell-cell adhesion regulation of cell-cell adhesion T cell proliferation positive regulation of cell adhesion regulation of cell adhesion regulation of T cell activation regulation of T cell proliferation defense response to virus response to virus regulation of type II interferon production type II interferon production positive regulation of type II interferon production cellular response to virus	extracellular region cellular anatomical entity extracellular space
B, E, H, K	Interleukin-21 receptor	molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity interleukin-21 receptor activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus cellular process cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus cellular process 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 multicellular organismal process cell activation natural killer cell activation lymphocyte activation leukocyte activation	cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane
C, F, I	Cytokine receptor common subunit gamma	molecular transducer activity coreceptor activity signaling receptor activity transmembrane signaling receptor activity cytokine receptor activity immune receptor activity protein binding binding cytokine binding growth factor binding interleukin-2 binding interleukin-15 receptor activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus cellular process cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus cell surface receptor signaling pathway signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus cellular process signal transduction interleukin-7-mediated signaling pathway response to interleukin-7 cellular response to interleukin-7 immune response immune system process interleukin-2-mediated signaling pathway cellular response to interleukin-2 response to interleukin-2 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 positive regulation of biosynthetic process positive regulation of macromolecule metabolic process 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 regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular biosynthetic process regulation of localization import into cell positive regulation of cellular component organization regulation of cellular component organization transport vesicle-mediated transport cellular component organization localization positive regulation of endocytosis phagocytosis cellular component organization or biogenesis regulation of endocytosis regulation of transport regulation of phagocytosis regulation of vesicle-mediated transport establishment of localization positive regulation of phagocytosis positive regulation of transport endocytosis developmental process multicellular organismal process cellular developmental process hemopoiesis B cell activation cell activation cell development mononuclear cell differentiation mature B cell differentiation lymphocyte differentiation lymphocyte activation leukocyte activation B cell differentiation cell differentiation anatomical structure development leukocyte differentiation regulation of leukocyte differentiation regulation of leukocyte activation regulation of cell activation regulation of cell differentiation positive regulation of T cell differentiation regulation of cell development T cell differentiation in thymus positive regulation of developmental process multicellular organism development positive regulation of cell activation positive regulation of T cell differentiation in thymus T cell activation positive regulation of leukocyte activation T cell differentiation regulation of immune system process positive regulation of immune system process positive regulation of T cell activation positive regulation of cell development regulation of leukocyte cell-cell adhesion positive regulation of multicellular organismal process regulation of developmental process positive regulation of leukocyte cell-cell adhesion regulation of T cell differentiation in thymus leukocyte cell-cell adhesion positive regulation of cell-cell adhesion regulation of T cell differentiation positive regulation of lymphocyte activation cell adhesion cell-cell adhesion positive regulation of hemopoiesis positive regulation of cell differentiation regulation of multicellular organismal process regulation of cell-cell adhesion regulation of lymphocyte differentiation regulation of multicellular organismal development positive regulation of cell adhesion regulation of cell adhesion regulation of T cell activation regulation of hemopoiesis positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation regulation of lymphocyte activation interleukin-15-mediated signaling pathway cellular response to interleukin-15 response to interleukin-15 interleukin-4-mediated signaling pathway response to interleukin-4 cellular response to interleukin-4 CD4-positive, alpha-beta T cell differentiation alpha-beta T cell differentiation CD4-positive, alpha-beta T cell activation alpha-beta T cell activation CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation regulatory T cell differentiation positive regulation of B cell differentiation regulation of B cell differentiation regulation of B cell activation positive regulation of B cell activation response to interleukin-9 interleukin-9-mediated signaling pathway cellular response to interleukin-9 regulation of alpha-beta T cell activation positive regulation of CD4-positive, alpha-beta T cell differentiation positive regulation of regulatory T cell differentiation positive regulation of alpha-beta T cell activation regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation positive regulation of alpha-beta T cell differentiation regulation of CD4-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation positive regulation of CD4-positive, alpha-beta T cell activation positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation regulation of regulatory T cell differentiation regulation of CD4-positive, alpha-beta T cell activation	cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cell periphery cell surface membrane plasma membrane cellular anatomical entity external side of plasma membrane side of membrane intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-containing complex receptor complex endosome intracellular vesicle endomembrane system cytoplasmic vesicle vesicle endoplasmic reticulum

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D, G, J	IPR003443	Interleukin-15/Interleukin-21 family	Family
A, D, G, J	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily
B, E, H, K	IPR003961	Fibronectin type III	Domain
B, E, H, K	IPR003531	Short hematopoietin receptor, family 1, conserved site	Conserved Site
B, E, H, K	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B, E, H, K	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
C, F, I	IPR048648	Cytokine receptor-like factor 2-like, D2 domain	Domain
C, F, I	IPR003531	Short hematopoietin receptor, family 1, conserved site	Conserved Site
C, F, I	IPR003961	Fibronectin type III	Domain
C, F, I	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
C, F, I	IPR048651	Cytokine receptor-like factor 2-like, D1 domain	Domain
C, F, I	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, D, G, J	Pharos: Q9HBE4	celiac disease common variable immunodeficiency IL21-related infantile inflammatory bowel disease rheumatoid arthritis Acquired Hypogammaglobulinemia attention deficit hyperactivity disorder, inattentive type juvenile idiopathic arthritis primary biliary cholangitis sclerosing cholangitis alopecia areata bipolar disorder psoriasis systemic lupus erythematosus atopic eczema
B, E, H, K	Pharos: Q9HBE5	cryptosporidiosis-chronic cholangitis-liver disease syndrome IgE responsiveness, atopic ulcerative colitis allergic rhinitis head and neck cancer invasive ductal breast carcinoma Lupus Erythematosus, Systemic primary biliary cholangitis systemic lupus erythematosus asthma cutaneous lupus erythematosus malignant mesothelioma psoriasis tuberculosis chronic obstructive pulmonary disease cryptosporidiosis-chronic cholangitis-liver disease syndrome IgE responsiveness, atopic ulcerative colitis allergic rhinitis head and neck cancer invasive ductal breast carcinoma Lupus Erythematosus, Systemic primary biliary cholangitis systemic lupus erythematosus asthma cutaneous lupus erythematosus malignant mesothelioma psoriasis tuberculosis chronic obstructive pulmonary disease ductal breast carcinoma in situ interstitial cystitis lung adenocarcinoma osteosarcoma Sjogren syndrome
C, F, I	Pharos: P31785	T-B+ severe combined immunodeficiency due to gamma chain deficiency severe combined immunodeficiency Omenn syndrome Sezary syndrome combined immunodeficiency, X-linked Liver Cirrhosis, Experimental multiple sclerosis osteosarcoma prostate carcinoma relapsing-remitting multiple sclerosis acute myeloid leukemia schizophrenia cutaneous lupus erythematosus interstitial cystitis malignant glioma T-B+ severe combined immunodeficiency due to gamma chain deficiency severe combined immunodeficiency Omenn syndrome Sezary syndrome combined immunodeficiency, X-linked Liver Cirrhosis, Experimental multiple sclerosis osteosarcoma prostate carcinoma relapsing-remitting multiple sclerosis acute myeloid leukemia schizophrenia cutaneous lupus erythematosus interstitial cystitis malignant glioma neuroblastoma periodontitis psoriasis breast carcinoma congenital combined immunodeficiency esophageal adenocarcinoma invasive ductal breast carcinoma lung cancer malignant mesothelioma primary cutaneous T-cell lymphoma rheumatoid arthritis Crohn disease glioblastoma large cell medulloblastoma 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 R01GM133198.