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Related Experiment Video

Updated: Mar 6, 2026

Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device
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Creating Rapid Oxygen Oscillations in Microbial Single-cell Growth Analysis using a Microfluidic Double-layer Device

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Mechanism for microbial population collapse in a fluctuating resource environment.

Serdar Turkarslan1, Arjun V Raman1, Anne W Thompson1

  • 1Institute for Systems Biology, Seattle, WA, USA.

Molecular Systems Biology
|March 22, 2017
PubMed
Summary

Microbial communities struggle in fluctuating environments due to gene regulation trade-offs. A single mutation prevented collapse by stabilizing essential gene and protein levels, highlighting regulatory resilience.

Keywords:
fluctuating resource environmentmicrobial population collapseregulationresiliencesyntrophy

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Area of Science:

  • Microbiology
  • Systems Biology
  • Genetics

Background:

  • Microbial communities require resilience to fluctuating environments.
  • Gene regulation is key to managing metabolic trade-offs for survival.

Purpose of the Study:

  • To investigate how gene regulation impacts microbial community resilience in fluctuating environments.
  • To understand the mechanisms behind community collapse and potential prevention strategies.

Main Methods:

  • Imposed fluctuating environments on Desulfovibrio vulgaris and Methanococcus maripaludis co-cultures.
  • Utilized RNA-seq, proteomics, microcalorimetry, and single-cell transcriptome analysis.
  • Introduced a single regulatory mutation to observe its effect on community stability.

Main Results:

  • Microbial communities progressively lost proficiency in restoring physiological states after environmental shifts.
  • Most cultures collapsed within 3-7 shifts due to conditional gene regulation.
  • A single regulatory mutation prevented collapse by stabilizing essential transcript and protein levels.

Conclusions:

  • Conditional gene regulation can lead to microbial community collapse in fluctuating environments.
  • Stabilizing essential gene and protein abundance through specific mutations enhances regulatory resilience.
  • Metabolic flexibility management is critical for microbial community survival under environmental perturbations.