2b5i Summary

pdbe.org/2b5i
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cytokine receptor complex

The structure was published by Wang, X., Rickert, M., and Garcia, K.C., in 2005 in a paper entitled "Structure of the quaternary complex of interleukin-2 with its alpha, beta, and gammac receptors." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 2.3 Å and deposited in 2005.

The experimental data on which the structure is based was also deposited.

This entry contains 12 copies of 4 unique biopolymers (complete list).

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms heterotetramers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A Interleukin-2 P60568 (21-153) (IL2_HUMAN)search Homo sapienssearch 99% 133 90%
B Interleukin-2 receptor beta chain P14784 (27-240) (IL2RB_HUMAN)search Homo sapienssearch < 90% 214 91%
C Cytokine receptor common gamma chain P31785 (56-254) (IL2RG_HUMAN)search Homo sapienssearch < 90% 199 95%
D Interleukin-2 receptor alpha chain P01589 (22-238) (IL2RA_HUMAN)search Homo sapienssearch < 90% 217 56%


This entry contains 4 unique UniProt proteins:

UniProt accession Name Organism PDB
P60568 (21 - 153) Interleukin-2 Homo sapiens
P14784 (27 - 240) Interleukin-2 receptor beta chain Homo sapiens
P31785 (56 - 254) Cytokine receptor common gamma chain Homo sapiens
P01589 (22 - 238) Interleukin-2 receptor alpha chain Homo sapiens

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A (P60568) Short-chain cytokinessearch Growth Hormone; Chain: A;search PF00715: Interleukin 2search
B Fibronectin type IIIsearch Immunoglobulinssearch
C Fibronectin type IIIsearch Immunoglobulinssearch Fibronectin type III domainsearch, Interleukin-6 receptor alpha chain, bindingsearch
D Complement control module/SCR domainsearch Complement Module, domain 1search Sushi domain (SCR repeat)search

Chain ID Cellular component (GO) Biological process (GO) Molecular function (GO)
A (P60568) extracellular regionsearch extracellular spacesearch positive regulation of regulatory T cell differentiationsearch positive regulation of tyrosine phosphorylation of Stat5 proteinsearch positive regulation of immunoglobulin secretionsearch positive regulation of cell growthsearch negative regulation of protein phosphorylationsearch positive regulation of protein phosphorylationsearch positive regulation of transcription from RNA polymerase II promotersearch immune system processsearch positive regulation of interferon-gamma productionsearch protein kinase C-activating G-protein coupled receptor signaling pathwaysearch regulation of T cell homeostatic proliferationsearch negative regulation of B cell apoptotic processsearch positive regulation of cytosolic calcium ion concentrationsearch T cell differentiationsearch positive regulation of activated T cell proliferationsearch negative regulation of lymphocyte proliferationsearch cell adhesionsearch positive regulation of B cell proliferationsearch positive regulation of dendritic spine developmentsearch positive regulation of interleukin-17 productionsearch immune responsesearch cell-cell signalingsearch positive regulation of T cell proliferationsearch positive regulation of inflammatory responsesearch positive regulation of cell proliferationsearch positive regulation of isotype switching to IgG isotypessearch natural killer cell activationsearch positive regulation of T cell differentiationsearch positive regulation of tissue remodelingsearch extrinsic apoptotic signaling pathway in absence of ligandsearch G-protein coupled receptor signaling pathwaysearch negative regulation of apoptotic processsearch negative regulation of inflammatory responsesearch negative regulation of heart contractionsearch interleukin-2 receptor bindingsearch growth factor activitysearch cytokine activitysearch glycosphingolipid bindingsearch carbohydrate bindingsearch kappa-type opioid receptor bindingsearch kinase activator activitysearch
B (P14784) membranesearch cytokine receptor activitysearch
C (P31785) membranesearch cytokine receptor activitysearch

Chain InterPro annotation
A Interleukin-2search Four-helical cytokine-like, coresearch Four-helical cytokine, coresearch
B Short hematopoietin receptor, family 1, conserved sitesearch Fibronectin type IIIsearch Immunoglobulin-like foldsearch
C Short hematopoietin receptor, family 1, conserved sitesearch Fibronectin type IIIsearch Immunoglobulin-like foldsearch Interleukin-6 receptor alpha, bindingsearch
D Sushi/SCR/CCP domainsearch Interleukin-2 receptor alphasearch