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Related Concept Videos

Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
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Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Global Regulatory Systems

Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
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Exponential Growth

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Updated: May 31, 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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Temporal and spatial oscillations in bacteria.

Peter Lenz1, Lotte Søgaard-Andersen

  • 1Department of Physics, Philipps-Universität Marburg, Renthof , Marburg, Germany. peter.lenz@physik.uni-marburg.de

Nature Reviews. Microbiology
|July 16, 2011
PubMed
Summary
This summary is machine-generated.

Biological oscillations, crucial for bacterial processes like gene expression and cell division, are driven by biochemical oscillators. This review explores the mechanisms and design principles of temporal and spatial oscillatory systems.

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Area of Science:

  • * Molecular and Cellular Biology
  • * Biochemistry
  • * Systems Biology

Background:

  • * Oscillations are fundamental to biological systems across all scales, particularly in bacteria.
  • * These oscillations regulate critical cellular processes, including gene expression, cell cycle, division, DNA segregation, and polarity.
  • * Biochemical oscillators generate periodic variations in parameters to produce oscillatory outputs.

Purpose of the Study:

  • * To review the mechanisms underlying biological oscillations in bacteria.
  • * To discuss the design principles of temporal and spatial oscillatory systems.
  • * To provide insights into how periodic protein activity and localization drive cellular cycles.

Main Methods:

  • * Literature review of existing research on biological oscillators.
  • * Analysis of mechanisms governing temporal and spatial oscillations.
  • * Examination of design principles for oscillatory systems.

Main Results:

  • * Temporal oscillators utilize periodic protein accumulation/activity for cycles like cell and circadian cycles.
  • * Spatial oscillators employ periodic protein localization to define subcellular positions, e.g., cell division sites.
  • * Oscillators are built upon the periodic variation of parameters over time.

Conclusions:

  • * Understanding oscillator mechanisms is key to comprehending fundamental bacterial processes.
  • * Design principles of temporal and spatial oscillators offer insights into cellular regulation.
  • * Oscillatory systems are a core feature of biological organization at the molecular level.