| X-RAY DIFFRACTION |
8.5 |
293.15 |
PriB was crystallized by sitting drop vapor diffusion method by 1:1 v/v mixing of 10 mg/mL PriB solution in the presence of 1 mM L-Tryptophan with reservoir solution containing 0.1 M Tris pH 8.5, 20% w/v PEG 3350, 0.1 M MgCl2. The mixed drops of 0.4-1 uL were equilibrated over a reservoir solution of 50 uL and incubated at 20oC in the dark. The ternary complex was obtained by 1:1.5 v/v soaking a solution of substrate mimic 25 mM Dimethylallyl S-thiolodiphosphate (DMSAPP), 0.05 M Tris pH 8.5, 10% w/v PEG 3350, 0.05 M MgCl2 into PriB crystals. The iodine derivative was prepared by 1:3 v/v soaking a solution of 0.5 M sodium iodide, 0.05 M Tris pH 8.5, 10% w/v PEG 3350, 0.05 M MgCl2 into PriB crystals |
