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Related Concept Videos

Centrioles and Centrosomes01:13

Centrioles and Centrosomes

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Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
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Centrosome Duplication02:25

Centrosome Duplication

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The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
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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.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures...
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Microtubules in Cell Motility01:24

Microtubules in Cell Motility

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Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
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Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
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Microtubules01:18

Microtubules

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Microtubules are the thickest cytoskeletal filaments with a diameter of 25 nm. In prokaryotic organisms, microtubules are commonly found in locomotory appendages like cilia and flagella. In eukaryotic cells, microtubules form specialized extensions for moving fluid over the surface, like those found in cells lining the intestine.
Microtubules have two structurally similar globular protein subunits: α and β tubulins. In the cytosol, the α and β tubulins form a heterodimer....
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Related Experiment Video

Updated: Nov 11, 2025

Isolation and Fluorescence Imaging for Single-particle Reconstruction of Chlamydomonas Centrioles
10:38

Isolation and Fluorescence Imaging for Single-particle Reconstruction of Chlamydomonas Centrioles

Published on: September 21, 2018

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Cell biology: Centrosomes in inner space.

Ulrich S Schwarz1

  • 1Institute for Theoretical Physics and BioQuant, Heidelberg University, Heidelberg, Germany.

Current Biology : CB
|March 23, 2021
PubMed
Summary

Microtubules guide the centrosome to the cell

Area of Science:

  • Cell Biology
  • Cytoskeleton Dynamics
  • Animal Cell Processes

Background:

  • Centrosome positioning is crucial for animal cell functions, including development and migration.
  • The precise mechanisms governing centrosome localization within the cell remain an active area of research.

Purpose of the Study:

  • To investigate the role of microtubules and the actin cytoskeleton in determining centrosome position.
  • To quantitatively analyze centrosome positioning in relation to the intracellular space.

Main Methods:

  • Utilized quantitative analysis of enucleated cells.
  • Employed adhesive micropatterns to control cell shape and intracellular space.
  • Observed and analyzed microtubule and actin cytoskeleton interactions.

More Related Videos

Imaging Centrosomes in Fly Testes
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Imaging Centrosomes in Fly Testes

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Super-Resolution Live Cell Imaging of Subcellular Structures
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Super-Resolution Live Cell Imaging of Subcellular Structures

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Related Experiment Videos

Last Updated: Nov 11, 2025

Isolation and Fluorescence Imaging for Single-particle Reconstruction of Chlamydomonas Centrioles
10:38

Isolation and Fluorescence Imaging for Single-particle Reconstruction of Chlamydomonas Centrioles

Published on: September 21, 2018

9.8K
Imaging Centrosomes in Fly Testes
09:41

Imaging Centrosomes in Fly Testes

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Super-Resolution Live Cell Imaging of Subcellular Structures
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Super-Resolution Live Cell Imaging of Subcellular Structures

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Main Results:

  • Microtubules were found to be the primary drivers of centrosome positioning.
  • The centrosome was consistently located in the geometric center of the intracellular space.
  • The actin cytoskeleton defines the boundaries of the intracellular space influencing positioning.

Conclusions:

  • Microtubules actively position the centrosome within the confines of the actin cytoskeleton.
  • This mechanism ensures accurate centrosome placement essential for cell function and processes like migration.