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Related Concept Videos

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Cell Motility through Blebbing

Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
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Cell division and enlargement are processes that require precise control. The control ensures that cell division cannot proceed unless the cell has grown to a specific size. A spherical, dividing cell requires an approximately 1.6X increase in its surface area to double its volume. The secretory pathway also has a significant role in cell membrane enlargement. Secretory vesicles that bud off from the Golgi apparatus and later fuse with the plasma membrane during exocytosis are a major source of...
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Visualizing Membrane Ruffle Formation using Scanning Electron Microscopy
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Membrane abscission: first glimpse at dynamic ESCRTs.

Martin Mueller1, Manuel Alonso Y Adell, David Teis

  • 1Biocenter, Division of Cell Biology, Innsbruck Medical University, Innsbruck, Austria. david.teis@i-med.ac.at

Current Biology : CB
|August 11, 2012
PubMed
Summary
This summary is machine-generated.

Advanced live-cell imaging and computational modeling reveal how ESCRT-III filaments dynamically rearrange during cell membrane abscission, guided by Vps4.

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Area of Science:

  • Cell biology
  • Biophysics

Background:

  • The endosomal sorting complexes required for transport (ESCRT) machinery is crucial for membrane remodeling events.
  • ESCRT-III filaments undergo dynamic rearrangements essential for processes like viral budding and cell division.

Purpose of the Study:

  • To investigate the dynamic rearrangements of ESCRT-III filaments during membrane constriction and abscission.
  • To understand the role of Vps4 in regulating these dynamic processes.

Main Methods:

  • Advanced live-cell imaging techniques were employed to visualize ESCRT dynamics in real-time.
  • Computational modeling was utilized to analyze and interpret the observed filament rearrangements.

Main Results:

  • Live-cell imaging provided unprecedented insights into the Vps4-dependent rearrangements of ESCRT-III filaments.
  • Computational models successfully recapitulated the observed dynamic behaviors during membrane constriction.

Conclusions:

  • The study elucidates the intricate mechanisms of ESCRT-III filament dynamics during abscission.
  • Vps4 plays a critical role in orchestrating these rearrangements for successful membrane scission.