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Indole prevents Escherichia coli cell division by modulating membrane potential
Catalin Chimerel1, Christopher M Field, Silvia Piñero-Fernandez
1Department of Genetics, University of Cambridge, Downing Street, Cambridge CB2 3EH, United Kingdom.
Biochimica Et Biophysica Acta
|March 6, 2012
Summary
Indole, a bacterial molecule, inhibits E. coli cell division by acting as a proton ionophore. This disrupts the cell membrane
Area of Science:
- Microbiology
- Molecular Biology
- Membrane Biology
Background:
- Indole is a known bacterial signaling molecule.
- Indole has been observed to inhibit Escherichia coli (E. coli) cell division at specific concentrations (3-5 mM).
Purpose of the Study:
- To elucidate the mechanism by which indole inhibits bacterial cell division.
- To determine if indole's ionophoric activity is responsible for blocking cell division.
Main Methods:
- Investigated indole's effect on the electrochemical potential across the E. coli cytoplasmic membrane.
- Assessed the impact of indole on MinCD oscillation and FtsZ ring formation.
Main Results:
- Indole functions as a proton ionophore.
- This ionophoric activity reduces the electrochemical potential across the bacterial cytoplasmic membrane.
- Indole deactivates MinCD oscillation, preventing FtsZ ring formation and thus inhibiting cell division.
Conclusions:
- Indole's inhibition of E. coli cell division is mediated by its proton ionophore activity.
- This represents the first identified natural ionophore that regulates a critical biological process.
- Findings offer insights into membrane biology, bacterial cell cycle regulation, and potential antibiotic development targeting bacterial membranes.
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