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Biosynthesis of Lipids01:29

Biosynthesis of Lipids

Microbial membranes exhibit remarkable diversity in lipid composition, reflecting evolutionary adaptations to various environmental conditions. The three domains of life—Bacteria, Archaea, and Eukarya—synthesize membrane lipids through distinct biosynthetic pathways, leading to fundamental structural differences that impact membrane stability, function, and adaptability.Fatty Acid-Based Lipids in Bacteria and EukaryaBacteria and eukaryotes share a common fatty acid biosynthesis pathway, which...
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Investigation of Microbial Cooperation via Imaging Mass Spectrometry Analysis of Bacterial Colonies Grown on Agar and in Tissue During Infection
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An integrative multi-omics approach points to membrane composition as a key factor in E. coli persistence.

Silvia J Cañas-Duarte1,2, Lei Sun2, María Isabel Pérez-López1

  • 1Department of Biological Sciences, Universidad de los Andes, Bogotá, Colombia.

Plos One
|June 29, 2026
PubMed
Summary

Bacteria can enter antibiotic-tolerant states called persistence. This study reveals that changes in bacterial cell membrane composition, specifically higher unsaturated fatty acids, are linked to spontaneous persistence in Escherichia coli.

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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli
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Population and Single-Cell Analysis of Antibiotic Persistence in Escherichia coli

Published on: March 24, 2023

Area of Science:

  • Microbiology
  • Bacterial Physiology
  • Genetics

Background:

  • Bacteria can enter dormant states, exhibiting transient tolerance to antibiotics.
  • Understanding the genetic basis of spontaneous (type II) bacterial persistence during exponential growth is crucial but largely unknown.

Purpose of the Study:

  • To investigate the genetic and molecular mechanisms underlying spontaneous bacterial persistence.
  • To explore the role of cell membrane modifications in bacterial persistence.

Main Methods:

  • Genomic, transcriptomic (RNA-Seq), and lipidomic analyses were employed.
  • High-persistence Escherichia coli DS1 (hipQ) mutant was analyzed.
  • Gene expression and lipid profiles of persister cells were compared to normally growing cells.

Main Results:

  • Activation of stress response mechanisms was not found to be critical for hipQ-driven spontaneous persistence.
  • Transcriptomic and lipidomic data suggest a strong link between cell membrane modifications and persistence.
  • Persister cells exhibited higher levels of unsaturated fatty acids in their cell membranes compared to growing cells.

Conclusions:

  • Changes in bacterial cell membrane composition are associated with spontaneous persistence.
  • This study enhances the understanding of spontaneous persister cells in the context of Escherichia coli DS1 (hipQ).
  • Cellular membrane alterations play a significant role in bacterial antibiotic tolerance.