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Live Cell Imaging of Chromosome Segregation During Mitosis
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Understanding the structural basis for controlling chromosome division.

David Barford1

  • 1Division of Structural Biology, Institute of Cancer Research, 237 Fulham Road, London SW3 6JB, UK dbarford@mrc-lmb.cam.ac.uk.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|January 28, 2015
PubMed
Summary
This summary is machine-generated.

Researchers studied the anaphase-promoting complex or cyclosome (APC/C), a key regulator of cell division. Structural insights reveal its architecture and how it targets proteins for destruction, crucial for accurate chromosome segregation during mitosis.

Keywords:
anaphase-promoting complex or cyclosomecell cyclechromosome division

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Structural Biology

Background:

  • Mitosis ensures accurate chromosome segregation during cell division.
  • The anaphase-promoting complex or cyclosome (APC/C) is a critical regulator of mitosis.
  • APC/C targets cell cycle proteins for proteasomal degradation.

Purpose of the Study:

  • To elucidate the structure and mechanism of the human APC/C.
  • To understand how APC/C regulates mitosis.
  • To provide atomic models for APC/C function.

Main Methods:

  • Determined crystal structures of APC/C subunits and subcomplexes.
  • Utilized single particle cryo-electron microscopy (cryo-EM) for whole complex analysis.
  • Generated pseudo-atomic models of functional APC/C states.

Main Results:

  • Provided atomic models of APC/C subunits and subcomplexes.
  • Interpreted cryo-EM density maps using structural data.
  • Developing pseudo-atomic models of functional APC/C states.

Conclusions:

  • Structural insights into APC/C architecture are emerging.
  • Understanding APC/C mechanisms of substrate recognition, catalysis, and regulation is advancing.
  • This research provides a foundation for understanding cell cycle control and potential therapeutic targets.