Crystal structure of a cytokine-binding region of gp130.Bravo, J., Staunton, D., Heath, J.K., Jones, E.Y.
(1998) EMBO J 17: 1665-1674
- PubMed: 9501088
- DOI: https://doi.org/10.1093/emboj/17.6.1665
- Primary Citation of Related Structures:
- PubMed Abstract:
The structure of the cytokine-binding homology region of the cell surface receptor gp130 has been determined by X-ray crystallography at 2.0 A resolution. The beta sandwich structure of the two domains conforms to the topology of the cytokine receptor superfamily. This first structure of an uncomplexed receptor exhibits a similar L-shaped quaternary structure to that of ligand-bound family members and suggests a limited flexibility in relative domain orientation of some 3 degrees. The putative ligand-binding loops are relatively rigid, with a phenylalanine side chain similarly positioned to exposed aromatic residues implicated in ligand binding for other such receptors. The positioning and structure of the N-terminal portion of the polypeptide chain have implications for the structure and function of cytokine receptors, such as gp130, which contain an additional N-terminal immunoglobulin-like domain.
Laboratory of Molecular Biophysics, The Rex Richards Building, South Parks Road, Oxford OX1 3QU.