Related Experiment Video

Updated: Dec 30, 2025

A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters
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A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters

Published on: April 20, 2015

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Novel MscL agonists that allow multiple antibiotics cytoplasmic access activate the channel through a common binding

Robin Wray1, Junmei Wang2, Irene Iscla1

  • 1Department of Physiology, UT Southwestern Medical Center, Dallas, Texas, United States of America.

Plos One
|January 25, 2020
PubMed

Insights

Researchers identified K05, a novel compound that modulates bacterial mechanosensitive channel of large conductance (MscL) activity. This discovery offers a new avenue for developing antibiotics to combat the growing antibiotic resistance crisis.

Area of Science:

  • Microbiology
  • Biophysics
  • Drug Discovery

Background:

  • The escalating antibiotic resistance crisis necessitates novel therapeutic targets and drug candidates.
  • Bacterial mechanosensitive channel of large conductance (MscL) acts as a cellular stress response valve and represents a potential antimicrobial target.
  • Limited identification of novel antibiotics and modulators of MscL activity hinders progress.

Purpose of the Study:

  • To identify and characterize novel small compounds that modulate MscL activity.
  • To compare the mechanism of action of a newly identified compound, K05, with a known MscL agonist, 011A.

Main Methods:

  • In vivo studies and molecular dynamic simulations were employed.
  • Characterization of MscL modulation by K05 and comparison with 011A.

Main Results:

  • The compound K05 specifically modulates MscL activity.
  • While K05 shares some similarities with 011A, including the binding pocket, their mechanisms of MscL modulation differ significantly.
  • Both in vivo and simulation data support distinct modulation pathways.

Conclusions:

  • K05 represents a novel chemical entity for targeting MscL.
  • Understanding the distinct mechanisms of K05 and 011A in modulating MscL activity provides crucial insights for developing new antibacterial agents.
  • MscL remains a promising target for novel antibiotic development.

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