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Related Concept Videos

The Spindle Assembly Checkpoint02:19

The Spindle Assembly Checkpoint

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The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
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Microtubule Associated Proteins (MAPs)01:42

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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

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Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
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The Mitotic Spindle02:27

The Mitotic Spindle

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The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei.
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Spindle Assembly02:50

Spindle Assembly

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Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
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Microtubule Instability02:17

Microtubule Instability

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Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
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Related Experiment Video

Updated: May 22, 2025

Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
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Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis

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Mps1 kinase functions in mitotic spindle assembly and error correction.

Victor M Bolanos-Garcia1

  • 1Faculty of Health and Life Sciences, Department of Biological and Medical Sciences, Oxford Brookes University, Oxford OX3 0BP, UK.

Trends in Biochemical Sciences
|March 13, 2025
PubMed
Summary

Protein kinase Mps1 (TTK) is crucial for the cell cycle

Keywords:
Mps1/TTK kinasechromosome segregation regulationchromosome-microtubule attachmentkinase inhibitorskinetochore complexesspindle assembly checkpoint (SAC)

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Combining Mitotic Cell Synchronization and High Resolution Confocal Microscopy to Study the Role of Multifunctional Cell Cycle Proteins During Mitosis
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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • The mitotic spindle assembly checkpoint (SAC) ensures accurate chromosome segregation during cell division.
  • Protein kinase Mps1 (TTK) is a key upstream regulator of the SAC, initiating signaling pathways.
  • Mps1 recruitment to kinetochores is essential for SAC function.

Purpose of the Study:

  • To review the essential functions of Mps1 in the SAC.
  • To discuss Mps1's role in error correction and genome stability.
  • To explore the therapeutic potential of Mps1 inhibition in cancer.

Main Methods:

  • Literature review of Mps1 kinase functions.
  • Analysis of Mps1's role in cell cycle regulation.
  • Examination of Mps1 inhibition as a cancer therapy strategy.

Main Results:

  • Mps1 is vital for SAC signaling and accurate chromosome segregation.
  • Mps1 contributes to error correction mechanisms, safeguarding genome stability.
  • Mps1 inhibition shows therapeutic promise for cancers with SAC defects.

Conclusions:

  • Mps1 kinase plays a critical role in cell cycle regulation and genome stability.
  • Targeting Mps1 offers a potential therapeutic strategy for specific cancer types.
  • Further research into Mps1's functions may reveal new treatment avenues.