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Related Experiment Videos

Sec13 induces genomic instability in U2OS cells.

Choong-Ryoul Sihn1, Eun-Jung Suh, Kee-Ho Lee

  • 1Department of Biology, College of Sciences, Kyung Hee University, Seoul 130-701, Korea.

Experimental & Molecular Medicine
|July 8, 2005
PubMed
Summary

Human Sec13 protein is crucial for cell division regulation. It ensures proper mitotic progression and genomic stability, preventing cell cycle arrest and apoptosis when damaged.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Sec13p is a known endoplasmic reticulum-Golgi transport protein.
  • Recent studies indicate Sec13p's role in septation in fission yeast.
  • The function of human Sec13 during mitosis requires further investigation.

Purpose of the Study:

  • To investigate the role of human Sec13 protein during mitosis in U2OS cells.
  • To determine Sec13's cell cycle expression and localization.
  • To elucidate Sec13's function in mitotic progression and genomic stability.

Main Methods:

  • Cell cycle analysis of Sec13 expression.
  • Immunofluorescence microscopy for Sec13 localization.
  • Green fluorescent protein (GFP) technology to observe Sec13 function.
  • Analysis of mitotic arrest, cell cycle phase, and apoptosis.
  • Microscopy to assess nuclear morphology.

Main Results:

  • Sec13 expression is constant throughout the cell cycle.
  • Sec13 localizes to kinetochores during metaphase.
  • Sec13 is essential for evading mitotic arrest upon spindle damage.
  • Loss of Sec13 function leads to G1-like phase and apoptosis.
  • Overexpression of Sec13 results in giant nuclei.

Conclusions:

  • Sec13 regulates the metaphase/anaphase transition.
  • Sec13 is functionally associated with the mitotic machinery.
  • Sec13 plays a role in maintaining genomic stability during mitosis.

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