| X-RAY DIFFRACTION |
7.5 |
277 |
The catalytic domain of the PDE9Q453E mutant (10-15 mg/mL, amino acids 181-506) was stored in a buffer of 50 mM NaCl, 20 mM Tris.HCl pH 7.5, 1 mM beta-mercaptoethanol, and 1 mM EDTA. After mixing with 2 mM IBMX, the PDE9Q453E-IBMX complex was crystallized by hanging drop vapor diffusion against the well buffer of 2.0 M Na formate, 0.1 M HEPES pH 7.5, 5% xylitol at 277K. Crystals of the PDE9Q453E-(S)-BAY73-6691 complex were prepared by soaking PDE9Q453E-IBMX co-crystals in the crystallization buffer plus 2 mM (S)-BAY73-6691 at 398K for 3 days, VAPOR DIFFUSION, HANGING DROP |
