Journal
STRUCTURE
Volume 16, Issue 9, Pages 1333-1344Publisher
CELL PRESS
DOI: 10.1016/j.str.2008.06.005
Keywords
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Funding
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [W-31-109-Eng-38]
- NIH [A1047300]
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IL-22 is an IL-10 family cytokine that initiates innate immune responses against bacterial pathogens and contributes to immune disease. IL-22 biological activity is initiated by binding to a cell-surface complex composed of lL-22R1 and IL-10R2 receptor chains and further regulated by interactions with a soluble binding protein, IL-22BP, which shares sequence similarity with an extracellular region of IL-22R1 (slL-22R1). lL-22R1 also pairs with the IL-20R2 chain to induce IL-20 and IL-24 signaling. To define the molecular basis of these diverse interactions, we have determined the structure of the IL-22/sIL-22R1 complex. The structure, combined with homology modeling and surface plasmon resonance studies, defines the molecular basis for the distinct affinities and specificities of IL-22 and IL-10 receptor chains that regulate cellular targeting and signal transduction to elicit effective immune responses.
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