Understanding Bacterial Movement: Feedback Control in Chemotaxis
Author Information
Author(s): Hamadeh Abdullah, Roberts Mark A. J., August Elias, McSharry Patrick E., Maini Philip K., Armitage Judith P., Papachristodoulou Antonis
Primary Institution: University of Oxford
Hypothesis
How does feedback control affect the chemotaxis pathway in Rhodobacter sphaeroides?
Conclusion
The study found that a specific feedback architecture improves the chemotactic performance of Rhodobacter sphaeroides.
Supporting Evidence
- Bacteria use feedback to adapt their sensing ability to environmental changes.
- The study developed four models to represent different feedback configurations.
- Only one model was able to explain the chemotaxis response in Rhodobacter sphaeroides.
- The non-invalidated model showed superior robustness to noise and parametric uncertainties.
Takeaway
Bacteria can swim towards good places and away from bad ones by changing how they move, and this study shows that some ways of doing this work better than others.
Methodology
The researchers developed mathematical models of the chemotaxis pathway and conducted experiments to test these models.
Limitations
The exact connectivity between feedback proteins and receptor clusters is unknown.
Digital Object Identifier (DOI)
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