2PSM

Crystal structure of Interleukin 15 in complex with Interleukin 15 receptor alpha

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2psma1	All alpha proteins	4-helical cytokines	4-helical cytokines	Short-chain cytokines	Interleukin-15 (IL-15)	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d2psma2	Artifacts	Tags	Tags	Tags	N-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth B]	d2psmb2	All alpha proteins	4-helical cytokines	4-helical cytokines	Short-chain cytokines	Interleukin-15 (IL-15)	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
C [auth B]	d2psmb3	Artifacts	Tags	Tags	Tags	N-terminal Tags	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth F]	d2psmf_	Small proteins	Complement control module/SCR domain	Complement control module/SCR domain	Complement control module/SCR domain	Interleukin-15 receptor subunit alpha	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
D [auth C]	d2psmc1	Small proteins	Complement control module/SCR domain	Complement control module/SCR domain	Complement control module/SCR domain	Interleukin-15 receptor subunit alpha	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Short-chain cytokines	8023645	4000852	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	4-helical cytokines	8036025	3001717	SCOP2 (2022-06-29)
C [auth B]	SCOP2B Superfamily	4-helical cytokines	8036025	3001717	SCOP2B (2022-06-29)
B [auth F]	SCOP2B Superfamily	Sushi/CCP/SCR domain	8036031	3000902	SCOP2B (2022-06-29)
D [auth C]	SCOP2 Family	Sushi/CCP/SCR domain	8023651	4003458	SCOP2 (2022-06-29)
D [auth C]	SCOP2 Superfamily	Sushi/CCP/SCR domain	8036031	3000902	SCOP2 (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	IL15	e2psmA1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: IL15	ECOD (1.6)
C [auth B]	IL15	e2psmB1	A: alpha bundles	X: Ferritin/Heme oxygenase/4-helical cytokines	H: 4-helical cytokines (From Topology)	T: 4-helical cytokines	F: IL15	ECOD (1.6)
B [auth F]	Sushi	e2psmF1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi	ECOD (1.6)
D [auth C]	Sushi	e2psmC1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1250.70	Mainly Alpha	Up-down Bundle	Growth Hormone	Chain: A	CATH (4.3.0)
C [auth B]	1.20.1250.70	Mainly Alpha	Up-down Bundle	Growth Hormone	Chain: A	CATH (4.3.0)
B [auth F]	2.20.28.230	Mainly Beta	Single Sheet	Rubrerythrin, domain 2		CATH (4.3.0)
D [auth C]	2.20.28.230	Mainly Beta	Single Sheet	Rubrerythrin, domain 2		CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A, C [auth B]	Interleukin-15	IL15	Mus musculus (house mouse)	IL15*01	R-LIKE-DOMAIN IL15 (Pr49-162)	RPI	IL15	IMGT (202506-0)
B [auth F], D [auth C]	Interleukin-15 receptor subunit alpha	1F-DOMAIN	Mus musculus (house mouse)	IL15RA*01	F-LIKE-DOMAIN F-DOMAIN	RPI	1F-DOMAIN	IMGT (202506-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth B]	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
B [auth F], D [auth C]	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C [auth B]	Interleukin-15	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	regulation of defense response regulation of response to biotic stimulus regulation of biological process biological process involved in interspecies interaction between organisms response to stimulus regulation of response to external stimulus response to other organism defense response biological regulation response to external stimulus response to biotic stimulus regulation of defense response to virus defense response to virus regulation of response to stimulus defense response to other organism regulation of defense response regulation of response to biotic stimulus regulation of biological process biological process involved in interspecies interaction between organisms response to stimulus regulation of response to external stimulus response to other organism defense response biological regulation response to external stimulus response to biotic stimulus regulation of defense response to virus defense response to virus regulation of response to stimulus defense response to other organism response to stress regulation of response to stress regulation of defense response to virus by host response to external biotic stimulus response to virus immune response positive regulation of biological process positive regulation of response to stimulus positive regulation of immune response immune system process regulation of immune response regulation of immune system process positive regulation of immune system process developmental process immune system development multicellular organism development multicellular organismal process lymph node development animal organ development anatomical structure development hematopoietic or lymphoid organ development system development regulation of cellular process regulation of protein modification process positive regulation of glycoprotein metabolic process positive regulation of protein metabolic process carbohydrate derivative metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process positive regulation of protein glycosylation positive regulation of metabolic process regulation of protein O-linked glycosylation positive regulation of protein modification process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process protein metabolic process protein modification process regulation of glycoprotein biosynthetic process positive regulation of cellular process positive regulation of glycoprotein biosynthetic process carbohydrate derivative biosynthetic process regulation of biosynthetic process regulation of protein metabolic process glycoprotein biosynthetic process primary metabolic process regulation of macromolecule metabolic process glycoprotein metabolic process protein glycosylation macromolecule biosynthetic process regulation of glycoprotein metabolic process biosynthetic process glycosylation positive regulation of protein O-linked glycosylation macromolecule modification macromolecule glycosylation protein O-linked glycosylation regulation of protein glycosylation metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of metabolic process neutrophil activation cell activation myeloid leukocyte activation granulocyte activation leukocyte activation cell population proliferation lymphocyte activation NK T cell proliferation leukocyte proliferation NK T cell activation T cell activation alpha-beta T cell proliferation mononuclear cell proliferation lymphocyte proliferation alpha-beta T cell activation T cell proliferation 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 positive regulation of cell population proliferation regulation of leukocyte activation regulation of cell activation positive regulation of natural killer cell proliferation positive regulation of lymphocyte activation positive regulation of cell activation positive regulation of leukocyte activation positive regulation of mononuclear cell proliferation regulation of multicellular organismal process regulation of natural killer cell activation regulation of lymphocyte proliferation regulation of leukocyte proliferation positive regulation of lymphocyte proliferation positive regulation of natural killer cell activation natural killer cell activation natural killer cell proliferation regulation of cell population proliferation positive regulation of leukocyte proliferation regulation of mononuclear cell proliferation positive regulation of multicellular organismal process regulation of lymphocyte activation regulation of natural killer cell proliferation regulation of leukocyte differentiation cellular developmental process regulation of developmental process cell development mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation regulation of cell development regulation of T cell differentiation cell differentiation T cell differentiation regulation of lymphocyte differentiation regulation of multicellular organismal development hemopoiesis regulation of T cell activation regulation of hemopoiesis leukocyte differentiation anatomical structure maturation cell maturation developmental maturation interleukin-15-mediated signaling pathway cellular response to stimulus cell surface receptor signaling pathway signaling response to cytokine cellular response to interleukin-15 cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction response to interleukin-15 positive regulation of developmental process natural killer cell differentiation positive regulation of cell development regulation of natural killer cell differentiation positive regulation of hemopoiesis positive regulation of cell differentiation positive regulation of natural killer cell differentiation positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation extrathymic T cell selection extrathymic T cell differentiation T cell selection myeloid leukocyte differentiation macrophage differentiation myeloid cell differentiation cytokine production regulation of cytokine production interleukin-17 production gene expression regulation of gene expression regulation of interleukin-17 production positive regulation of gene expression positive regulation of interleukin-17 production positive regulation of cytokine production negative regulation of cold-induced thermogenesis homeostatic process negative regulation of metabolic process negative regulation of biological process adaptive thermogenesis multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis negative regulation of cellular process temperature homeostasis negative regulation of multicellular organismal process 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 positive regulation of cell adhesion regulation of cell adhesion regulation of T cell proliferation positive regulation of phosphorylation regulation of protein phosphorylation peptidyl-tyrosine modification positive regulation of phosphate metabolic process positive regulation of peptidyl-tyrosine phosphorylation regulation of phosphate metabolic process peptidyl-amino acid modification phosphate-containing compound metabolic process phosphorus metabolic process positive regulation of protein phosphorylation protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of peptidyl-tyrosine phosphorylation regulation of phosphorylation regulation of phosphorus metabolic process peptidyl-tyrosine phosphorylation	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nuclear speck nuclear body intracellular organelle cellular anatomical structure nucleoplasm organelle lumen organelle nuclear lumen cytoplasm cytosol extracellular region extracellular space
B [auth F], D [auth C]	Interleukin-15 receptor alpha chain	protein binding binding kinase binding enzyme binding protein kinase binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity cytokine receptor activity immune receptor activity interleukin-15 receptor activity	multicellular organismal process regulation of leukocyte differentiation regulation of cellular process regulation of leukocyte activation regulation of cell activation regulation of cell differentiation mononuclear cell differentiation lymphocyte differentiation regulation of cell development positive regulation of developmental process multicellular organism development positive regulation of cell activation cell differentiation anatomical structure development positive regulation of leukocyte activation multicellular organismal process regulation of leukocyte differentiation regulation of cellular process regulation of leukocyte activation regulation of cell activation regulation of cell differentiation mononuclear cell differentiation lymphocyte differentiation regulation of cell development positive regulation of developmental process multicellular organism development positive regulation of cell activation cell differentiation anatomical structure development positive regulation of leukocyte activation regulation of immune system process regulation of natural killer cell activation positive regulation of immune system process natural killer cell differentiation developmental process regulation of biological process positive regulation of cell development positive regulation of natural killer cell activation natural killer cell activation positive regulation of multicellular organismal process leukocyte differentiation cellular developmental process regulation of developmental process positive regulation of biological process cell development lymphocyte activation leukocyte activation positive regulation of lymphocyte activation regulation of natural killer cell differentiation positive regulation of hemopoiesis positive regulation of cell differentiation regulation of multicellular organismal process positive regulation of cellular process regulation of lymphocyte differentiation regulation of multicellular organismal development hemopoiesis positive regulation of natural killer cell differentiation cell activation biological regulation immune system process regulation of hemopoiesis cellular process positive regulation of leukocyte differentiation positive regulation of lymphocyte differentiation regulation of lymphocyte activation 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	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure cytoplasmic vesicle organelle intracellular vesicle cytoplasm intracellular membrane-bounded organelle vesicle extracellular region nuclear membrane membrane nucleus membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure cytoplasmic vesicle organelle intracellular vesicle cytoplasm intracellular membrane-bounded organelle vesicle extracellular region nuclear membrane membrane nucleus endomembrane system organelle envelope nuclear envelope organelle membrane cell surface cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C [auth B]	IPR003443	Interleukin-15/Interleukin-21 family	Family
A, C [auth B]	IPR020439	Interleukin-15	Family
A, C [auth B]	IPR020466	Interleukin-15, mammal	Family
A, C [auth B]	IPR009079	Four-helical cytokine-like, core	Homologous Superfamily
B [auth F], D [auth C]	IPR000436	Sushi/SCR/CCP domain	Domain
B [auth F], D [auth C]	IPR042372	Interleukin-15 receptor subunit alpha	Family
B [auth F], D [auth C]	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily

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.