| X-RAY DIFFRACTION |
7.0 |
293 |
Crystals of pIRE1alpha (547 - 977) with GSK2850163 were prepared by mixing pIRE1alpha with 0.5 mM GSK2850163 and incubating overnight on ice. The crystals were grown at 20 C by vapor diffusion in sitting drops containing 2 ul of protein (13 mg/ml in 50 mM Hepes, pH 7.5, 200 mM NaCl, 5 mM DTT, 1 mM EDTA , 0.5 mM GSK2850163, 0.25% DMSO ) and 2 ul reservoir solution containing PEG 3350 (16%-22%), 100 mM Hepes pH 7.0, 200 mM Ca2+ acetate. The crystals were thick rods that appeared over 2-5 days and reached full size (0.05 X 0.025 X 0.3 mm) in 2 weeks. Seeding was used to improve crystal quality. The pIRE1alpha + GSK2850163 crystals were frozen in a solution of 20% ethylene glycol, 22% PEG 3350, 0.2 M calcium acetate added in a stepwise manner to the protein drop before mounting the crystal on the loop. |
