Latency, thermal stability, and identification of an inhibitory compound of mirolysin, a secretory protease of the human periodontopathogen Tannerella forsythia.
J. Enzyme Inhib. Med. Chem. 36, 1267-1281 (2021)
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 (Ki = 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.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Nmr-based Fragment Screening ; Periodontitis ; Tannerella Forsythia ; Protease Inhibitors ; Proteolysis; Porphyromonas-gingivalis; Periodontal Health; Virulence Factors; Nmr-spectroscopy; Red Complex; Suppression; Gingipains; Mechanism; Prevalence; Activation
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Language
english
Publication Year
2021
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2021
ISSN (print) / ISBN
1475-6366
e-ISSN
1475-6374
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Volume: 36,
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Pages: 1267-1281
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Informa Healthcare
Publishing Place
London
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Peer reviewed
POF-Topic(s)
30203 - Molecular Targets and Therapies
Research field(s)
Enabling and Novel Technologies
PSP Element(s)
G-503000-001
Grants
PLGrid Infrastructure
Foundation for Polish Science
Helmholtz Zentrum Munchen
Polish Ministry of Science and Higher Education
National Science Center, Poland
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Erfassungsdatum
2021-07-27