Download MendeleyLatency, thermal stability, and identification of an inhibitory compound of mirolysin, a secretory protease of the human periodontopathogen Tannerella forsythia .
Zak, K.M., Bostock, M.J., Waligorska, I., Thogersen, I.B., Enghild, J.J., Popowicz, G.M., Grudnik, P., Potempa, J., Ksiazek, M.(2021) J Enzyme Inhib Med Chem 36: 1267-1281
- PubMed: 34210221
- DOI: https://doi.org/10.1080/14756366.2021.1937619
- Primary Citation of Related Structures:
7OD0 - PubMed Abstract:
Mirolysin is a secretory protease of Tannerella forsythia , a member of the dysbiotic oral microbiota responsible for periodontitis. In this study, we show that mirolysin latency is achieved by a "cysteine-switch" mechanism exerted by Cys23 in the N-terminal profragment. Mutation of Cys23 shortened the time needed for activation of the zymogen from several days to 5 min. The mutation also decreased the thermal stability and autoproteolysis resistance of promirolysin. Mature mirolysin is a thermophilic enzyme and shows optimal activity at 65 °C. Through NMR-based fragment screening, we identified a small molecule (compound (cpd) 9 ) that blocks promirolysin maturation and functions as a competitive inhibitor ( K i = 3.2 µM), binding to the S1' subsite of the substrate-binding pocket. Cpd 9 shows superior specificity and does not interact with other T. forsythia proteases or Lys/Arg-specific proteases.
Organizational Affiliation:
Helmholtz Zentrum München, Institute of Structural Biology, Neuherberg, Germany.
