Matrix metalloproteinase-7 (MMP-7) fluorometric drug discovery kit, RED



BML-AK304-0001	1 Kit	500.00 USD

Product Specification

Application:	Designed to screen MMP-7 inhibitors using a quenched fluorogenic peptide.

Quantity:	For 96 wells.

Handling:	Avoid freeze/thaw cycles.

Long Term Storage:	-80°C

Kit/Set Contains:	1 vial MMP-7 enzyme 1 vial substrate (OmniMMP™ RED) 1 vial 6'-TAMRA calibration standard 1 vial control inhibitor (NNGH) 1 bottle (20 ml) assay buffer 1 black 96-well microplate Instructions

Miscellaneous/General:	Matrix metalloproteinase-7 (MMP-7, matrilysin, pump-1) is a member of the MMP family of extracellular proteases.These enzymes play a role in many normal and disease states by virtue of their broad substrate specificities. Targets of MMP-7 include collagen, osteopontin, pro-TNF-α, E-cadherin, ß4 integrin, and Fas ligand. MMP-7 is secreted as a 28kDa proenzyme (as measured by SDS-PAGE), and activated by cleavage to 19kDa. MMP-7 is an important target for inhibitor screening due to its involvement in diseases such as cancer. The MMP-7 Fluorometric (also known as fluorimetric) Drug Discovery Kit, RED is a complete assay system designed to screen MMP-7 inhibitors using a quenched fluorogenic substrate OmniMMP™ RED: TQ3-GABA-Pro-Cha-Abu-Smc-His-Ala-Dab(6-TAMRA)-Ala-Lys-NH₂[TQ3=quencher; GABA=4-aminobutyric acid; Cha=L-cyclohexylalanine; Abu=2-aminobutyric acid; Smc=S-methyl-L-cysteine; Dab=2,4-diaminobutyric acid; 6-TAMRA=6-tetramethylrhodamine]. TAMRA fluorescence is thoroughly quenched by the TQ3 group until cleavage by MMPs separates the two moieties. The OmniMMP™ RED substrate offers key advantages over other MMP substrates. 1) Emission at the red end of the spectrum (576 nm after excitation at 545 nm) avoids the interference at lower wavelengths often exhibited by screening compounds, and by substances commonly found in biological samples and tissue culture medium. 2) MMP substrate peptides display poor aqueous solubility, often with K_ms near their limits of solubility, making enzyme and inhibitor kinetics difficult. MMP K_ms for OmniMMP™ RED substrate are below its solubility limit. 3) In addition to the efficient binding as exhibited by low K_ms, OmniMMP™ RED is avidly cleaved by MMPs, with k_cat/K_ms in the range of 10⁴-10⁶ M^-1sec^-1. 4) The ultra-strong fluorescence of OmniMMP™ RED allows for substrate concentrations much lower than the K_m, a condition generally desirable in inhibitor screening assays. The assays are performed in a convenient 96-well microplate format. The kit is useful to screen inhibitors of MMP-7, a potential therapeutic target. The compound NNGH is also included as a prototypic control inhibitor.

Background / Technical Information:	NCBI Reference Sequence: NM_002423 The OmniMMP™ RED substrate offers key advantages over other MMP substrates. 1) Emission at the red end of the spectrum (576 nm after excitation at 545 nm) avoids the interference at lower wavelengths often exhibited by screening compounds, and by substances commonly found in biological samples and tissue culture medium. 2) MMP substrate peptides display poor aqueous solubility, often with K_ms near their limits of solubility, making enzyme and inhibitor kinetics difficult. MMP K_ms for OmniMMP™ RED substrate are below its solubility limit. 3) In addition to the efficient binding as exhibited by low K_ms, OmniMMP™ RED is avidly cleaved by MMPs, with k_cat/K_ms in the range of 10⁴-10⁶ M^-1sec^-1. 4) The ultra-strong fluorescence of OmniMMP™ RED allows for substrate concentrations much lower than the K_m, a condition generally desirable in inhibitor screening assays.

General Literature References

Matrix metalloproteinases: regulators of the tumor microenvironment: K. Kessenbrock & Z. Werb; Cell 141, 52 (2010), Abstract;

Updated biological roles for matrix metalloproteinases and new "intracellular" substrates revealed by degradomics : G.S. Butler & C.M. Overall; Biochemistry 48, 10830 (2009), Abstract;

Matrix metalloproteinases: they’re not just for matrix anymore!: L.J. McCawley & L.M. Matrisian; Curr. Opin. Cell Biol. 13, 534 (2001), Abstract;

Osteopontin, a novel substrate for matrix metalloproteinase-3 (stromelysin-1) and matrix metalloproteinase-7 (matrilysin): R. Agnihotri, et al.; J. Biol. Chem. 276, 28261 (2001), Abstract; Full Text

The metalloproteinase matrilysin proteolytically generates active soluble Fas ligand and potentiates epithelial cell apoptosis: W.C. Powell, et al.; Curr. Biol. 9, 1441 (1999), Abstract;

Discovery of CGS 27023A, a non-peptidic, potent, and orally active stromelysin inhibitor that blocks cartilage degradation in rabbits: L.J. MacPherson, et al.; J. Med. Chem. 40, 2525 (1997), Abstract;

Biochemical characterization of matrilysin. Activation conforms to the stepwise mechanisms proposed for other matrix metalloproteinases: T. Crabbe, et al.; Biochemistry 31, 8500 (1992), Abstract;