title: Purification, crystallization and preliminary X-ray diffraction of a complex between IL-10 and soluble IL-10R1.
abstract: A complex between interleukin-10 and the extracellular domain of its high-affinity receptor (sIL-10R1) has been crystallized from polyethylene glycol solutions. Crystals suitable for diffraction analysis required the modification of the NXS/T glycosylation sites on sIL-10R1 by site-directed mutagenesis and inclusion of the detergent cyclohexyl-methyl-beta-D-maltopyranoside in the crystallization experiments. The crystals belong to space group P3(2)12 or its enantimorph P3(1)12, with unit-cell parameters a = b = 46.23, c = 307.78 A, alpha = beta = 90, gamma = 120 degrees, and diffract X-rays to approximately 2.9 A. The IL-10 dimer is positioned on a crystallographic twofold, resulting in one IL-10 chain and one sIL-10R1 chain in the asymmetric unit, which corresponds to a solvent content of approximately 44%.
authors.affiliation: Center for Biophysical Sciences and Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
authors.forename: K
authors.initials: K
authors.lastname: Josephson
authors.forename: D T
authors.initials: DT
authors.lastname: McPherson
authors.forename: M R
authors.initials: MR
authors.lastname: Walter
mesh_terms: D000818:Animals; D003001:Cloning, Molecular; D003460:Crystallization; D018360:Crystallography, X-Ray; D004330:Drosophila / Q000737:chemistry; D016753:Interleukin-10 / Q000737:chemistry*; D011487:Protein Conformation; D018123:Receptors, Interleukin / Q000737:chemistry*; D053701:Receptors, Interleukin-10; D012995:Solubility
chemical_list: D018123:Receptors, Interleukin; D053701:Receptors, Interleukin-10; D016753:Interleukin-10