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New noncovalent inhibitors of penicillin-binding proteins from penicillin-resistant bacteriaTurk, Samo ...Background: Penicillin-binding proteins (PBPs) are well known and validated targets for antibacterial therapy. The most important clinically used inhibitors of PBPs ß-lactams inhibit transpeptidase ... activity of PBPs by forming a covalent penicilloyl-enzyme complex that blocks the normal transpeptidation reaction; this finally results in bacterial death. In some resistant bacteria the resistance is acquired by active-site distortion of PBPs, which lowers their acylation efficiency for ?-lactams. To address this problem we focused our attention to discovery of novel noncovalent inhibitors of PBPs. Methodology/Principal Findings Our in-house bank of compounds was screened for inhibition of three PBPs from resistant bacteria: PBP2a from Methicillin-resistant Staphylococcus aureus (MRSA), PBP2x from Streptococcus pneumoniae strain 5204, and PBP5fm from Enterococcus faecium strain D63r. Initial hit inhibitor obtained by screening was then used as a starting point for computational similarity searching for structurally related compounds and several new noncovalent inhibitors were discovered. Two compounds had promising inhibitory activities of both PBP2a and PBP2x 5204, and good in-vitro antibacterial activities against a panel of Gram-positive bacterial strains. Conclusions We found new noncovalent inhibitors of PBPs which represent important starting points for development of more potent inhibitors of PBPs that can target penicillin-resistant bacteria.Source: PloS one [Elektronski vir]. - ISSN 1932-6203 (Vol. 6, no. 5, 2011, 10 str.)Type of material - article, component partPublish date - 2011Language - englishCOBISS.SI-ID - 3007857
Author
Turk, Samo |
Verlaine, Olivier |
Gerards, Thomas |
Živec, Matej, 1979- |
Humljan, Jan |
Sosič, Izidor |
Amoroso, Ana |
Zervosen, Astrid |
Luxen, André |
Joris, Bernard |
Gobec, Stanislav, 1970-
Topics
non-kovalentni inhibitorji |
proteini |
PBP2a
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Turk, Samo | 29773 |
Verlaine, Olivier | |
Gerards, Thomas | |
Živec, Matej, 1979- | 26493 |
Humljan, Jan | 23599 |
Sosič, Izidor | 30816 |
Amoroso, Ana | |
Zervosen, Astrid | |
Luxen, André | |
Joris, Bernard | |
Gobec, Stanislav, 1970- | 15284 |
Source: Personal bibliographies
and: SICRIS
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