Journal: International Journal of Molecular Sciences
Article Title: Kallikrein-Related Peptidase 14 Activates Zymogens of Membrane Type Matrix Metalloproteinases (MT-MMPs)—A CleavEx Based Analysis
doi: 10.3390/ijms21124383
Figure Lengend Snippet: Gelatin zymography of proMMPs by KLK14-mediated processing. Activation of proMMPs by KLK14 results in a fully functional mature enzyme. Each proMMP was incubated with the indicated concentrations of KLK14 for 1 h at 37 °C. The reaction was stopped by the addition of KLK14-specific inhibitors, and the reaction mixture was analyzed by SDS-PAGE, followed by a zymogram with gelatin as a substrate. The proMMP2 ( A ) negative control was not activated. ProMMP14 ( B ), proMMP15 ( C ), and proMMP16 ( D ) were activated, whereas proMMP17 ( E ) did not show hydrolysis of gelatin; yet a shift corresponding to the loss of the profragment was observed (note that an amino acid substitution was introduced in proMMP17 by the manufacturer (R&D Systems, Abingdon, United Kingdom)). KLK = kallikrein-related peptidase; MMP = matrix metalloproteinase.
Article Snippet: A total of 0.5 μg native proMMP2 (catalog no. 902-MP-010, R&D Systems, Abingdon, United Kingdom), 0.5 μg proMMP14 (catalog no. 918-MP-010, R&D Systems), 1 μg proMMP15 (catalog no. 916-MP-010, R&D Systems), 0.5 μg proMMP16 (catalog no. 1785-MP-010, R&D Systems), and 1 μg proMMP17 (catalog no. 7796-MP-010, R&D Systems) were separately incubated in 10 μL with a range of KLK14 concentrations (25–250 nM, with molar ratios from around 1:65 to 1:10 KLK14:MMP) in the presence of 5 μM batimastat (Sigma-Aldrich, St. Louis, MO, USA) for 1 h at 37 °C in PBS.
Techniques: Zymography, Activation Assay, Functional Assay, Incubation, SDS Page, Negative Control