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Related Experiment Videos

Dynamin spirals.

J E Hinshaw1

  • 1Laboratory of Cell Biochemistry and Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA. jennyh@helix.nih.gov

Current Opinion in Structural Biology
|May 14, 1999
PubMed
Summary
This summary is machine-generated.

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Dynamin protein is crucial for membrane recycling and cellular processes. New research shows dynamin can form structures that pinch off vesicles, suggesting its role in endocytosis.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Dynamin is recognized for its role in membrane recycling within cells.
  • Its function in clathrin-mediated endocytosis is supported by various assays and structural studies.
  • Previous research focused on dynamin's assembled spiral structure.

Purpose of the Study:

  • To investigate the direct mechanism of dynamin in vesicle formation.
  • To explore dynamin's capability to induce membrane scission independently.
  • To provide evidence for dynamin's direct role in the final step of endocytosis.

Main Methods:

  • Liposome binding assays to study dynamin-membrane interactions.
  • In vitro reconstitution of dynamin-mediated membrane constriction and vesiculation.

Related Experiment Videos

  • Biochemical analysis of dynamin's GTPase activity in relation to membrane dynamics.

    • Main Results:

    • Dynamin binds to liposomes and self-assembles into helical structures.
    • GTP addition leads to the constriction and vesiculation of these dynamin-liposome tubes.
    • These findings demonstrate dynamin's intrinsic ability to mediate membrane fission.

    Conclusions:

    • Dynamin possesses the inherent capability to drive membrane scission.
    • The observed in vitro behavior strongly suggests dynamin's direct role in pinching off vesicles during endocytosis.
    • Dynamin is a key mechanical component responsible for vesicle formation at the plasma membrane.