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2b5i
From Proteopedia
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| , resolution 2.30Å | |||||||
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| Ligands: | |||||||
| Gene: | IL2 (Homo sapiens), IL2RB (Homo sapiens), IL2RG (Homo sapiens), IL2RA (Homo sapiens) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
cytokine receptor complex
Contents |
Overview
Interleukin-2 (IL-2) is an immunoregulatory cytokine that acts through a quaternary receptor signaling complex containing alpha (IL-2Ralpha), beta (IL-2Rbeta), and common gamma chain (gc) receptors. In the structure of the quaternary ectodomain complex as visualized at a resolution of 2.3 angstroms, the binding of IL-2Ralpha to IL-2 stabilizes a secondary binding site for presentation to IL-2Rbeta. gammac is then recruited to the composite surface formed by the IL-2/IL-2Rbeta complex. Consistent with its role as a shared receptor for IL-4, IL-7, IL-9, IL-15, and IL-21, gammac forms degenerate contacts with IL-2. The structure of gammac provides a rationale for loss-of-function mutations found in patients with X-linked severe combined immunodeficiency diseases (X-SCID). This complex structure provides a framework for other gammac-dependent cytokine-receptor interactions and for the engineering of improved IL-2 therapeutics.
Disease
Known diseases associated with this structure: Combined immunodeficiency, X-linked, moderate OMIM:[308380], Diabetes mellitus, insulin-dependent, susceptibility to, 10 OMIM:[147730], Interleukin-2 receptor, alpha chain, deficiency of OMIM:[147730], Severe combined immunodeficiency due to IL2 deficiency OMIM:[147680], Severe combined immunodeficiency, X-linked OMIM:[308380]
About this Structure
2B5I is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structure of the quaternary complex of interleukin-2 with its alpha, beta, and gammac receptors., Wang X, Rickert M, Garcia KC, Science. 2005 Nov 18;310(5751):1159-63. PMID:16293754
Page seeded by OCA on Thu Mar 20 15:57:49 2008
