Related Experiment Video
Updated: Aug 1, 2026
13:28
Introducing Shear Stress in the Study of Bacterial Adhesion
Published on: September 2, 2011
16.2K
Smart superglue in streptococci? The proof is in the pulling
1From the Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom mark.howarth@bioch.ox.ac.uk.
The Journal of Biological Chemistry
|May 28, 2017
Summary
Gram-positive bacteria use thioester proteins for adhesion. A new study shows these adhesins can regenerate their thioester without external force, a novel mechanical proofreading mechanism for bacterial anchoring.
Area of Science:
- Microbiology
- Biochemistry
- Biophysics
Background:
- Gram-positive bacteria utilize reactive thioester-containing proteins for surface adhesion via covalent bond formation.
- The precise mechanisms governing the selective adhesion of these bacterial proteins to diverse host surfaces remain incompletely understood.
Purpose of the Study:
- To investigate the molecular mechanisms underlying selective bacterial adhesion mediated by thioester-containing proteins.
- To explore the role of mechanical forces in regulating the function of bacterial adhesins.
Main Methods:
- Application of single-molecule force spectroscopy to analyze the behavior of individual adhesin proteins.
- Investigation of thioester regeneration dynamics under varying mechanical conditions.
Main Results:
- Demonstrated that a specific adhesin protein can spontaneously regenerate its reactive thioester bond even without applied mechanical force.
- Identified a novel mechanism where only force-supporting reactions are maintained, suggesting a mechanical proofreading capability.
Conclusions:
- The findings reveal a new principle of mechanical proofreading in bacterial adhesion.
- This mechanism ensures that only functionally relevant adhesive interactions, those supporting bacterial anchorage, are sustained.
