Matrix metalloproteinases (MMPs) belong to a family of secreted or membrane-associated proteins capable of digesting extracellular matrix components. The importance of MMPs in tumor development and invasion and other diseases is well known. MMP-3 (stromelysin-1, transin-1) is proposed as a potential therapeutic target. SensoLyte® 520 MMP-3 Assay Kit uses a 5-FAM (fluorophore) and QXL520™ (quencher) labeled FRET peptide substrate for continuous measurement of the enzyme activities. This substrate showed excellent specificity to MMP-3 with minimal cross-reaction with MMP-1, 2, 7, 8, 9, 13 and 14. In an intact FRET peptide, the fluorescence of 5-FAM is quenched by QXL520™. Upon the cleavage of the FRET peptide by MMP-3, the fluorescence of 5-FAM is recovered, and can be continuously monitored at excitation/emission = 490 nm/520 nm. With superior fluorescence quantum yield and longer emission wavelength, 5-FAM/QXL520™ based FRET peptide is less interfered by the autofluorescence of test compounds and cellular components and provides better assay sensitivity.
Component A: MMP-3 substrate 5-FAM/QXL™520 FRET peptide Ex/Em=490 nm/520 nm upon cleavage: 60 µL
Component B: 5-FAM-Pro-Leu-OH, fluorescence reference standard Ex/Em=490 nm/520 nm: 1 mM, 10 µL
Component C: APMA, 4-aminophenylmercuric acetate (Caution: Organic mercury. Handle with care! Do not dispose into sink!): 1 M, 20 µL
Component D: Assay buffer: 20 mL
Component E: Stop solution: 10 mL
Storage & stability
Store all components at -20°C. Protect Components A and B from light. Components D and E can be stored at 4°C for convenience.
Matrix metalloproteinase content and activity in low-platelet, low-leukocyte and high-platelet, high-leukocyte platelet rich plasma (PRP) and the biologic response to PRP by human ligament fibroblasts.
Am J Sports Med . 2014 Mar 13 ;
42(5) 1211 |DOI : 10.1177/0363546514524710
Matrix metalloproteinase-3 is activated by HtrA2/Omi in dopaminergic cells: relevance to Parkinson's disease