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A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
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A tactile response in Staphylococcus aureus.

Steven K Lower1, Ruchirej Yongsunthon, Nadia N Casillas-Ituarte

  • 1The Ohio State University, Columbus, Ohio, USA. lower.9@osu.edu

Biophysical Journal
|November 4, 2010
PubMed
Summary
This summary is machine-generated.

Bacteria can sense touch to detect spatial gradients on surfaces, challenging the belief that only temporal gradients are detectable. This tactile response helps bacteria like Staphylococcus aureus navigate and adhere to solid substrates, such as in biofilms.

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Area of Science:

  • Microbiology
  • Cell Biology
  • Biophysics

Background:

  • Bacteria are known to sense temporal gradients (e.g., chemotaxis).
  • Prokaryotes were previously thought to be too small to sense spatial gradients.
  • Most bacteria inhabit solid substrates, forming biofilms, suggesting a mechanism for spatial sensing.

Purpose of the Study:

  • To investigate if bacteria possess a mechanism to sense spatial gradients on solid surfaces.
  • To provide experimental evidence for a tactile response in bacteria.

Main Methods:

  • Studied the nonmotile bacterium Staphylococcus aureus.
  • Investigated cellular response to substrate interfaces.
  • Analyzed adhesin localization and binding activity using avidity mapping.

Main Results:

  • Demonstrated that Staphylococcus aureus has a tactile response to spatial gradients.
  • Showed attached cells recognize substrate interfaces and direct adhesins.
  • Revealed "Braille-like" avidity maps reflecting biochemical responses and protein binding.

Conclusions:

  • Bacteria, even nonmotile ones, can sense spatial gradients via a primitive sense of touch.
  • This tactile response is crucial for bacteria interacting with solid substrates.
  • Cellular adhesin distribution is guided by substrate interface recognition.