Cardiovascular Research
The cardiovascular system
Multiple proteases are known to regulate the cardiovascular system in physiological but also pathological conditions. Elevated protease activities are associated to hypertension, atherosclerosis and altered blood coagulation, among others. Matrix metalloproteinases, calpain, cathepsins and caspases are involved in cardiac remodelling.
Monitoring the activity of key proteases is useful in drug discovery and to screen for protease inhibitors. We constantly innovate to provide the best portfolio of quantitative assays, most being based on the FRET principle using proprietary substrates. As a world leader in FRET peptide technology we are proud to offer the same variety of long wavelength quencher and dye pairings used in our catalog peptides.
Our Sensolyte Assay Kits enable extensive detection of protease activity to be faster, easier and compatible with HTS.
FRET substrates
FRET occurs between a peptide tagged to a donor and an acceptor when placed within 10-100Å of each other resulting in the donor’s excitation fluorescence to be quenched by the acceptor. Enzymatic hydrolysis of the peptide results in recovery of the donor fluorescence following spatial separation of the donor and acceptor upon energy transfer.
| Dye (donor) | Quencher (acceptor) | Donor Ex/Em | |
| SensoLyte® 390 | Mca | Dnp |
•
325/393 nm |
|---|---|---|---|
| SensoLyte® 490 | EDANS | DABCYL |
•
340/490 nm |
| SensoLyte® 520 | 5-FAM or HiLyte™ Fluor 488 | QXL®520 |
•
494/521 nm |
| SensoLyte® 570 | 5-TAMRA | QXL®570 |
•
547/574 nm |
Fluorogenic substrates
These substrates do not require a quencher and contain a C-terminal dye that does not fluoresce until it is cleaved from the peptide (fluorescent form of dye is released).
| Dye (donor) | Donor Ex/Em | |
| SensoLyte® AMC | AMC |
•
351/430 nm |
|---|---|---|
| SensoLyte® AFC | AFC |
•
382/480 nm |
| SensoLyte® Rh110 | Rh110 |
•
501/527 nm |