Abstract
Thermolysin (TLN) and other thermolysin-like zinc metalloproteinases (TLPs),are important virulence factors for pathogenesis of bacterial infections by suppressing the innate immune system of the host. Therapeutic inhibition ofTLPs is believed to be a novel strategy inthe development of a new generation antibiotics.In the present study inhibition of TLN and angiotensin I-converting enzyme (ACE) by small peptides were studied by in vitro binding assays and theoretical calculations. The capacity of the peptides to inhibitTLN induced cleavage ofthe transcription factor nuclear factor kappa beta (NF-κB) was studied by electrophoretic mobility shift assays (EMSAs).Nine peptides inhibited ACE with IC50 values in the range 0.48 (IVY) to 1408 (HF) μM, while seven inhibited TLN with IC50 values in the range 0.00034 (IY) to 95640 (FW) μM. Calculations indicated that the peptides occupied the S1’ and S2’ subsites of ACE, and that IY, LW and IW occupiedthe S1’ and S2’ subsites, while FW, WL and WV occupiedthe S1 and S1’ subsites of TLN. EMSA showed that peptides inhibited TLN induced cleavage of NF-κB. The studied peptides may form as a basis for the design of new compoundstargeting TLN with a potential in the treatment of bacterial infections.
Keywords: Inhibition of Zn-metalloproteinases, thermolysin, angiotensin I-converting enzyme, drug targets, inhibitors, drug discovery, antibacterial drugs, electrophoretic mobility shift assays
Current Topics in Medicinal Chemistry
Title:Dipeptide Inhibitors of Thermolysin and Angiotensin I-Converting Enzyme
Volume: 12 Issue: 16
Author(s): Mahmud Tareq Hassan Khan, Kenichi Dedachi, Toshiro Matsui, Noriyuki Kurita, Monica Borgatti, Roberto Gambari and Ingebrigt Sylte
Affiliation:
Keywords: Inhibition of Zn-metalloproteinases, thermolysin, angiotensin I-converting enzyme, drug targets, inhibitors, drug discovery, antibacterial drugs, electrophoretic mobility shift assays
Abstract: Thermolysin (TLN) and other thermolysin-like zinc metalloproteinases (TLPs),are important virulence factors for pathogenesis of bacterial infections by suppressing the innate immune system of the host. Therapeutic inhibition ofTLPs is believed to be a novel strategy inthe development of a new generation antibiotics.In the present study inhibition of TLN and angiotensin I-converting enzyme (ACE) by small peptides were studied by in vitro binding assays and theoretical calculations. The capacity of the peptides to inhibitTLN induced cleavage ofthe transcription factor nuclear factor kappa beta (NF-κB) was studied by electrophoretic mobility shift assays (EMSAs).Nine peptides inhibited ACE with IC50 values in the range 0.48 (IVY) to 1408 (HF) μM, while seven inhibited TLN with IC50 values in the range 0.00034 (IY) to 95640 (FW) μM. Calculations indicated that the peptides occupied the S1’ and S2’ subsites of ACE, and that IY, LW and IW occupiedthe S1’ and S2’ subsites, while FW, WL and WV occupiedthe S1 and S1’ subsites of TLN. EMSA showed that peptides inhibited TLN induced cleavage of NF-κB. The studied peptides may form as a basis for the design of new compoundstargeting TLN with a potential in the treatment of bacterial infections.
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Tareq Hassan Khan Mahmud, Dedachi Kenichi, Matsui Toshiro, Kurita Noriyuki, Borgatti Monica, Gambari Roberto and Sylte Ingebrigt, Dipeptide Inhibitors of Thermolysin and Angiotensin I-Converting Enzyme, Current Topics in Medicinal Chemistry 2012; 12 (16) . https://dx.doi.org/10.2174/1568026611209061748
DOI https://dx.doi.org/10.2174/1568026611209061748 |
Print ISSN 1568-0266 |
Publisher Name Bentham Science Publisher |
Online ISSN 1873-4294 |
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