CHEMBL3887664

In Vitro Fluorescence Assay: A continuous assay is used in which the substrate is a synthetic peptide containing a fluorescent group (7-methoxycoumarin, Mca), which is quenched by energy transfer to a 2,4-dinitrophenyl group. The substrate is the peptide Mca-PQGL-(3-[2,4-dinitrophenyl]-L-2,3-diaminopropionyl)-AR-OH. When the peptide is cleaved by MMP a large increase in fluorescence is observed. The source of the enzyme for this assay is full-length, recombinant, human pro-MMP-2 expressed in Chinese Hamster Ovary (CHO) cells that is subsequently activated by an organomercurial compound, 4-aminophenyl mercuric acetate (APMA). APMA is removed through a desalting column (MMP-2 Calbiochem catalog number PF023). The assay buffer consists of 100 mM Tris-HCl (pH 7.5), 100 mM NaCl, 10 mM CaCl2 and 10 uM human serum albumin Each well of the 96-well plates consists of a 100 uL reaction mixture consisting of assay buffer, MMP (final concentration of 0.2 nM, prepared by diluting in assay buffer).