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Related Concept Videos

Cytoskeletal Coordination in Cell Migration01:32

Cytoskeletal Coordination in Cell Migration

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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Adaptability of Cytoskeletal Filaments01:12

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The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
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Introduction to the Cytoskeleton01:33

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Overview of the Cytoskeleton
The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ̶   microfilaments, microtubules, and intermediate filaments. Each has characteristic features that distinguish them, including the dynamics of their assembly and disassembly, mechanical properties, polarity, and the type of molecular motors associated with them. Earlier, they were thought to be present only in eukaryotic cells; however, their...
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The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
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Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
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Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
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Related Experiment Video

Updated: Jul 8, 2025

The Mechanics of Poro-Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton
08:50

The Mechanics of Poro-Elastic Contractile Actomyosin Networks As a Model System of the Cell Cytoskeleton

Published on: March 10, 2023

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Length control emerges from cytoskeletal network geometry.

Shane G McInally1, Alexander J B Reading2, Aldric Rosario3

  • 1Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, MA, 01609, USA.

Biorxiv : the Preprint Server for Biology
|December 11, 2023
PubMed
Summary
This summary is machine-generated.

Yeast cells control actin cable length through filament organization, not feedback. This emergent property allows cables to scale with cell size by adjusting formin activity.

Keywords:
Biological scalingBiological sciencesCell biologyCytoskeletonEmergenceSize control

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Area of Science:

  • Cell biology
  • Biophysics
  • Cytoskeletal dynamics

Background:

  • Cytoskeletal networks, crucial for cell function, are organized into higher-order structures.
  • Previous research focused on filament turnover feedback for cytoskeletal assembly control.
  • Actin cables in yeast are vital higher-order structures with poorly understood length regulation.

Conclusions:

  • A new paradigm for cytoskeletal higher-order structure control is proposed.
  • Emergent properties of filament organization are key to actin cable length regulation.
  • Cell size directly influences actin cable length through formin activity modulation.