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Introduction to the Cytoskeleton

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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 homologs were...

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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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The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm). These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate filaments...

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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 proteins that...

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Related Experiment Video

Updated: Jul 12, 2026

Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy

Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy

Published on: March 6, 2018

Intermediate filaments mediate cytoskeletal crosstalk.

Lynne Chang¹, Robert D Goldman

¹Feinberg School of Medicine, Northwestern University, Department of Cell and Molecular Biology, 303 East Chicago Avenue, Chicago, Illinois 60611, USA. l-chang1@northwestern.edu

Nature Reviews. Molecular Cell Biology

|September 16, 2004

Summary

Cytoskeletal networks, including intermediate filaments, communicate intricately. Intermediate filaments and associated proteins play a key role in mediating this crucial cellular crosstalk.

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Area of Science:

Cell Biology
Molecular Biology
Biochemistry

Background:

The cell cytoskeleton comprises three main systems: intermediate filaments, actin microfilaments, and microtubules.
These systems, despite differing protein compositions, exhibit constant communication (crosstalk).

Purpose of the Study:

To elucidate the molecular mechanisms underlying cytoskeletal crosstalk.
To highlight the role of intermediate filaments in mediating this communication.

Main Methods:

Review of recent studies on cytoskeletal interactions.
Analysis of protein components and their communication pathways.

Main Results:

Intermediate filaments are integral to cytoskeletal crosstalk.
Associated proteins are key mediators in this communication network.

Conclusions:

Understanding intermediate filament involvement is crucial for cell biology.
This crosstalk is fundamental to various cell-biological phenomena.