PDE9A2 Human Phosphodiesterase Enzymatic LeadHunter Assay - TW

Procedure Summary:

Human recombinant PDE9A2 expressed in insect Sf9 cells are used. Test compound and/or vehicle is preincubated with 8 ng/ml enzymeó in Tris-HCl buffer pH 7.2 for 15 minutes at 25⁰C. The reaction is initiated by addition of 100 nM fluorescein lableled cGMP and incubated for another 30 minutes. The reaction is terminated by the addition of IMAP binding solution. IMAP complexes with phosphate groups on nucleotide monophosphate generated from cyclic nucleotides through PDE activity. Determination of the amount of complex formed is read spectrofluorimetrically at 470 nm/525 nm. Compounds are screened at 10 µM.

Substrate:

0.1 µM FAM-cGMP

Incubation:

30 min at 25°C

Control Inhibitor:

Zaprinast

Criteria For Significance:

≥ 50% of max stimulation or inhibition

Test Concentration / Dose:

Suggested concentration for initial testing is 10 uM

Test Sample Requirements:

Minimum for 1) Screen: 25 μl of 10 mM stock -OR- 1 mg (pre-weighed). 2) Dose Response: 60 μl of 10 mM stock -OR- 1 mg (pre-weighed).

Minimum Order Quantity:

2