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
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.
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.
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