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Updated: Jul 11, 2026
10:52
Reconstitution of Basic Mitotic Spindles in Spherical Emulsion Droplets
Published on: August 13, 2016
Genetic analysis of the mitotic spindle
1Department of Biology, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Annual Review of Genetics
|January 1, 1996
Summary
Recent advances in understanding mitotic spindle function are reviewed. Key areas include spindle poles, centromeres, and motor proteins, with insights from studies on genetically tractable organisms.
Area of Science:
- Cell Biology
- Molecular Biology
- Genetics
Background:
- Mitotic spindle function is crucial for cell division.
- Recent decades have seen significant progress in understanding its molecular basis.
- Genetically tractable organisms have been instrumental in these discoveries.
Purpose of the Study:
- To review recent advances in mitotic spindle function.
- To focus on three key research areas: spindle poles, centromeres, and spindle motors.
- To synthesize findings from studies using genetically tractable organisms.
Main Methods:
- Review of existing literature and studies.
- Focus on research utilizing genetically tractable organisms.
- Analysis of molecular mechanisms and structural components of the spindle.
Main Results:
- Detailed examination of spindle pole structure, duplication, and microtubule organization.
- Comparison of simple yeast centromeres with complex eukaryotic centromeres.
- Identification and classification of microtubule-based motor proteins involved in spindle dynamics.
Conclusions:
- Understanding of mitotic spindle molecular mechanisms has rapidly advanced.
- Spindle poles, centromeres, and motor proteins are critical components.
- Further research in these areas continues to elucidate cell division processes.
Related Concept Videos
02:27The Mitotic Spindle
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.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
02:50Spindle Assembly
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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 microtubule array...
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 microtubule array...
02:11Forces Acting on Chromosomes
During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome assembly or congression at the equatorial plane, eventually leading to their alignment at the metaphase plate. The forces acting on the chromosomes are space and time-dependent; therefore, they vary with the position of the chromosomes as the cell progresses through mitosis.
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02:19The 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...
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02:57Meiosis vs. Mitosis
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
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02:27The Mitotic Spindle
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.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures bipolar mitotic...