RRC ID 50055
Author Ishii S, Fukui K, Yokoshima S, Kumagai K, Beniyama Y, Kodama T, Fukuyama T, Okabe T, Nagano T, Kojima H, Yano T.
Title High-throughput Screening of Small Molecule Inhibitors of the Streptococcus Quorum-sensing Signal Pathway.
Journal Sci Rep
Abstract The main components of the quorum-sensing system are expected to be favorable targets for drug development to combat various chronic infectious diseases. ComA of Streptococcus is an ATP-binding cassette transporter containing a peptidase domain (PEP), which is essential for the quorum-sensing signal production. Using high-throughput screening, we found a potent small molecule that suppressed the S. mutans quorum-sensing pathway through inhibition of PEP activity. The compound effectively attenuated the biofilm formation and competence development of S. mutans without inhibiting cell growth. The kinetic and structural studies with this molecule and a related compound unexpectedly revealed an allosteric site of PEP. This relatively hydrophobic site is thought to undergo large structural changes during the catalytic process. These compounds inhibit PEP activity by binding to and suppressing the structural changes of this site. These results showed that PEP is a good target for inhibitors of the Streptococcus quorum-sensing system.
Volume 7(1)
Pages 4029
Published 2017-6-22
DOI 10.1038/s41598-017-03567-2
PII 10.1038/s41598-017-03567-2
PMID 28642545
PMC PMC5481443
MeSH Anti-Bacterial Agents / chemistry Anti-Bacterial Agents / pharmacology* High-Throughput Screening Assays* Humans Microbial Sensitivity Tests Models, Molecular Molecular Conformation Protein Binding Quorum Sensing / drug effects* Signal Transduction / drug effects* Streptococcus / drug effects* Streptococcus / physiology* Structure-Activity Relationship
IF 3.998
DNA material pStMuPEP1(WT) (RDB15713) pStMuPEP1(Ala70Arg) (RDB15714) pSPB1 (RDB15715).