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Pulling tethers from adhered vesicles.

Ana-Suncana Smith1, Erich Sackmann, Udo Seifert

  • 1E 22 Institut für Biophysik, Technische Universität München, D-85748 Garching, Germany.

Physical Review Letters
|June 1, 2004
PubMed
Summary
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This study explores vesicle adhesion and tether formation using a theoretical model. It identifies critical forces for tether appearance and vesicle detachment, revealing how vesicle shape transitions influence these processes.

Area of Science:

  • Biophysics
  • Cell Biology
  • Adhesion Dynamics

Background:

  • Vesicles play crucial roles in cellular transport and function.
  • Understanding the forces governing vesicle adhesion and tether formation is key to cellular mechanics.

Purpose of the Study:

  • To investigate the interplay between vesicle adhesion and tether formation.
  • To develop a theoretical model for predicting tether formation under applied force.

Main Methods:

  • Developed a theoretical model simulating a pulling force on adhered vesicles.
  • Analyzed vesicle shape transitions and tether growth dynamics.
  • Calculated critical forces for tether onset and vesicle detachment.

Main Results:

Related Experiment Videos

  • Identified a critical onset force for spontaneous tether formation during a first-order shape transition.
  • Determined a finite detachment force for continuous vesicle unbinding.
  • Quantified critical forces and shape parameters based on reduced volume and adhesive potential.

    • Conclusions:

    • The study provides a quantitative framework for understanding vesicle-tether dynamics.
    • Results offer insights into the mechanical regulation of vesicle-mediated cellular processes.