Download MendeleyCrystal structure of the IL-10/IL-10R1 complex reveals a shared receptor binding site.
Josephson, K., Logsdon, N.J., Walter, M.R.(2001) Immunity 15: 35-46
- PubMed: 11485736
- DOI: https://doi.org/10.1016/s1074-7613(01)00169-8
- Primary Citation of Related Structures:
1J7V - PubMed Abstract:
Interleukin 10 (IL-10) is a dimeric cytokine that plays a central role in suppressing inflammatory responses. These activities are dependent on the interaction of IL-10 with its high-affinity receptor (IL-10R1). This intermediate complex must subsequently recruit the low-affinity IL-10R2 chain before cell signaling can occur. Here we report the 2.9 A crystal structure of IL-10 bound to a soluble form of IL-10R1 (sIL-10R1). The complex consists of two IL-10s and four sIL-10R1 molecules. Several residues in the IL-10/sIL-10R1 interface are conserved in all IL-10 homologs and their receptors. The data suggests that formation of the active IL-10 signaling complex occurs by a novel molecular recognition paradigm where IL-10R1 and IL-10R2 both recognize the same binding site on IL-10.
Organizational Affiliation:
Center for Macromolecular Crystallography, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
