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Related Concept Videos

The Spindle Assembly Checkpoint02:19

The Spindle Assembly Checkpoint

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...
The Spindle Assembly Checkpoint02:19

The Spindle Assembly Checkpoint

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...
The Cell Cycle Control System01:28

The Cell Cycle Control System

The cell cycle regulation directs how a cell proceeds from one phase to the next and begins mitosis. The cell cycle control system includes intracellular regulatory molecules and external triggers. They provide "stop" or "advance" signals and operate at specific cell cycle stages termed checkpoints to ensure that a particular process is completed before the cell advances to the next phase.
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
The Cell Cycle Control System02:11

The Cell Cycle Control System

The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
The Cell Cycle Control System02:11

The Cell Cycle Control System

The cell cycle is an organized set of events that leads the cell to divide into two daughter cells, each containing chromosomes identical to the parent cell. It is the cell cycle that leads to the formation of an entire organism from a single-cell zygote. Besides, cell division also functions in the renewal or repair of tissues in adult multicellular eukaryotes. For example, in the bone marrow, the stem cells divide to form new blood cells. Although essential for several functions, cell...
Separation of Sister Chromatids02:17

Separation of Sister Chromatids

At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...

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Related Experiment Video

Updated: May 30, 2026

Real-Time Monitoring of Aurora kinase A Activation using Conformational FRET Biosensors in Live Cells
06:29

Real-Time Monitoring of Aurora kinase A Activation using Conformational FRET Biosensors in Live Cells

Published on: July 30, 2020

Cell division: aurora B illuminates a checkpoint pathway.

Thomas J Maresca1

  • 1Biology Department, University of Massachusetts Amherst, Amherst, MA 01003, USA. tmaresca@bio.umass.edu

Current Biology : CB
|July 26, 2011
PubMed
Summary
This summary is machine-generated.

Aurora B kinase, crucial for mitotic error correction and chromosome alignment, also directly controls the spindle assembly checkpoint (SAC). This finding clarifies the complex interplay between these vital cell division processes.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Mitotic error correction, chromosome biorientation, and the spindle assembly checkpoint (SAC) are critical for accurate cell division.
  • The intricate relationships between these processes have historically complicated their individual study.

Purpose of the Study:

  • To investigate the regulatory role of Aurora B kinase in the context of mitotic error correction, chromosome biorientation, and the spindle assembly checkpoint (SAC).
  • To elucidate the direct mechanisms by which Aurora B kinase influences SAC activity.

Main Methods:

  • The study likely employed techniques such as immunofluorescence microscopy, biochemical assays, and potentially genetic manipulation of Aurora B kinase and SAC components.
  • Analysis focused on observing chromosome alignment, kinetochore-microtubule attachments, and SAC signaling dynamics.

Main Results:

  • Aurora B kinase was confirmed to play a key role in driving mitotic error correction and promoting chromosome biorientation.
  • New evidence demonstrates that Aurora B kinase directly regulates the spindle assembly checkpoint (SAC), adding a new layer to its known functions.

Conclusions:

  • Aurora B kinase is a central regulator integrating error correction, biorientation, and SAC signaling.
  • Understanding this integration is crucial for comprehending the fidelity of cell division and potential links to diseases like cancer.