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Related Experiment Videos

Anomalous diffusion in living yeast cells.

Iva Marija Tolić-Nørrelykke1, Emilia-Laura Munteanu, Genevieve Thon

  • 1The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark.

Physical Review Letters
|August 25, 2004
PubMed
Summary
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Investigating yeast cell cytoplasm viscoelasticity using lipid granule motion reveals subdiffusive behavior. Actin disruption reduces this subdiffusion, suggesting a role for cytoskeletal networks.

Area of Science:

  • Cell biology
  • Biophysics

Background:

  • The cytoplasm's viscoelastic properties influence cellular processes.
  • Understanding these properties is crucial for cell mechanics.

Purpose of the Study:

  • To investigate the viscoelastic properties of living yeast cell cytoplasm.
  • To characterize the motion of endogenous lipid granules within the cytoplasm.

Main Methods:

  • Combined video-based and laser-based tracking methods for broad frequency range observation.
  • Analysis of lipid granule trajectories to determine subdiffusive motion characteristics.

Main Results:

  • Lipid granules exhibit subdiffusive motion across a wide range of time scales (10^-4 to 10^2 s).
  • Observed subdiffusion differs from previous measurements in living cells.

Related Experiment Videos

  • Disruption of actin filaments leads to less subdiffusive motion.

    • Conclusions:

    • Cytoplasmic viscoelasticity in yeast is influenced by polymer networks and membranous structures.
    • Actin cytoskeleton plays a significant role in the observed subdiffusive motion of lipid granules.