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The Biology of Colicin M and Its Orthologs

Dimitri Chérier1,2, Delphine Patin1, Didier Blanot1

  • 1Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, 91198 Gif-sur-Yvette, France.

Antibiotics (Basel, Switzerland)
|September 28, 2021
PubMed

Insights

New antibacterial enzymes, Colicin M (ColM) and its variants, target essential bacterial cell wall precursors. These findings offer novel strategies against multidrug-resistant bacteria and potential applications in food preservation.

Area of Science:

  • Microbiology
  • Biochemistry
  • Molecular Biology

Background:

  • Antibiotic misuse has accelerated the rise of multidrug-resistant bacteria, posing a significant global health threat.
  • Novel antibacterial agents are urgently needed to combat resistant pathogens.
  • Colicins, bacteriocins produced by E. coli, exhibit potent antibacterial activity and are promising candidates for new antimicrobial therapies.

Purpose of the Study:

  • To provide a comprehensive review of Colicin M (ColM) and related enzymes.
  • To explore the unique mechanism of ColM in degrading peptidoglycan precursors.
  • To assess the potential of ColM-like proteins as therapeutic agents and food preservatives.

Main Methods:

  • Literature review of existing research on Colicin M and its orthologs.
  • Analysis of sequence alignments to identify ColM-like proteins.
  • Examination of the enzymatic activity and antibacterial spectra of characterized ColM variants.

Main Results:

  • Colicin M is the only known colicin that inhibits peptidoglycan biosynthesis by hydrolyzing lipid II.
  • ColM-like proteins share the same lipid II degradation activity but possess narrow antibacterial spectra.
  • Several ColM orthologs have been identified, highlighting a new family of antibacterial enzymes.

Conclusions:

  • Colicin M and its variants represent a novel class of antibacterial enzymes with a unique mechanism of action.
  • These enzymes hold potential for developing new treatments against multidrug-resistant bacteria.
  • Further research into ColM-like proteins could lead to applications in food preservation and novel therapeutics.
Keywords:
antibacterialscolicin Mcolicinslipid IIpeptidoglycan

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