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Related Experiment Videos

Vesicle tethering complexes in membrane traffic.

James R C Whyte1, Sean Munro

  • 1MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.

Journal of Cell Science
|June 22, 2002
PubMed
Summary
This summary is machine-generated.

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Membrane fusion relies on tethering complexes, not just SNARE proteins. Three related

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Membrane traffic specificity is crucial for cellular function.
  • SNARE proteins mediate vesicle fusion but are not the initial contact.
  • Vesicle tethering, a poorly understood process, precedes fusion.

Purpose of the Study:

  • To describe the 'quatrefoil' tethering complexes and their relation to other complexes.
  • To discuss the functional roles of diverse tethering complexes in membrane traffic.
  • To propose a framework for understanding vesicle tethering mechanisms.

Main Methods:

  • Literature review and synthesis of recent findings on tethering complexes.
  • Analysis of structural and functional relationships between protein complexes.

Related Experiment Videos

  • Conceptual framework development for membrane tethering.

    • Main Results:

    • Identification of three related 'quatrefoil' tethering complexes.
    • Demonstration that tethering complexes are diverse and not always related.
    • Proposal of kinetic and thermodynamic elements in vesicle tethering.

    Conclusions:

    • Vesicle tethering involves multiple mechanisms and diverse protein complexes.
    • The 'quatrefoil' complexes represent a related family of tethering factors.
    • Understanding tethering requires considering events upstream and downstream of Rab GTPases.