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Related Concept Videos

Introduction to the Cytoskeleton01:33

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...
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Adaptability of Cytoskeletal Filaments01:12

Adaptability of Cytoskeletal Filaments

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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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Intracellular Movement of Viruses and Bacteria01:10

Intracellular Movement of Viruses and Bacteria

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Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a...
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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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Cytoplasm01:24

Cytoplasm

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The cytoplasm consists of organelles and a framework of protein scaffolds called the cytoskeleton suspended in an aqueous solution, the cytosol. The cytosol is a rich broth of water, ions, salts, and various organic molecules.
Protein Folding and Misfolding
The cytoplasm is the location for several cellular processes, including protein synthesis and folding. The aqueous nature of the cytosol promotes protein folding such that the hydrophobic amino acid side chains are buried in the protein...
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Role of Septins01:02

Role of Septins

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Septins are the recently discovered fourth major protein component of the cytoskeleton, along with microfilaments, microtubules, and intermediate filaments. These proteins can associate with other cytoskeletal filaments and carry out varied roles or can be free-floating in the cytoplasm.
Cellular Functions of Septins
Recent studies have revealed the multifaceted roles of septins in various cellular processes such as cytokinesis, ciliogenesis, and neurogenesis. Septins act as scaffolds and...
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Related Experiment Video

Updated: May 4, 2026

Use of Shigella flexneri to Study Autophagy-Cytoskeleton Interactions
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Use of Shigella flexneri to Study Autophagy-Cytoskeleton Interactions

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Microbial pathogenesis and cytoskeletal function.

Samantha Gruenheid1, B Brett Finlay

  • 1Biotechnology Laboratory, University of British Columbia, Vancouver, Canada V6T 1Z3.

Nature
|April 18, 2003
PubMed
Summary
This summary is machine-generated.

Pathogenic microbes hijack host cell cytoskeletons for survival and replication. Studying these interactions reveals crucial molecular mechanisms of infectious diseases and normal cytoskeleton functions.

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Author Spotlight: Exploring Cytoskeletal Dynamics to Unveil Novel Antibiotics Through Innovative Cell-Based Assays
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Author Spotlight: Exploring Cytoskeletal Dynamics to Unveil Novel Antibiotics Through Innovative Cell-Based Assays
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Area of Science:

  • Microbiology
  • Cell Biology
  • Infectious Diseases

Background:

  • Pathogenic microbes manipulate host cell processes to establish survival niches.
  • The host cell cytoskeleton is a common target for pathogens, essential for various microbial strategies.
  • Understanding pathogen interactions with the cytoskeleton offers insights into both disease mechanisms and fundamental cell biology.

Purpose of the Study:

  • To elucidate how pathogenic microbes exploit the host cell cytoskeleton.
  • To highlight the dual contribution of studying host-pathogen interactions to infectious disease and cell biology research.

Main Methods:

  • Investigating pathogen attachment, entry, intracellular movement, and immune evasion strategies.
  • Utilizing tools like bacterial toxins to study Rho family GTPases.
  • Employing in vitro models, such as actin polymerization assays with Listeria and Shigella.

Main Results:

  • Pathogens utilize the cytoskeleton for critical life cycle steps including entry, motility, and vacuole manipulation.
  • Pathogen subversion of the cytoskeleton aids in avoiding host immune defenses like phagocytosis.
  • Pathogen-host cytoskeleton interactions provide novel experimental systems for cytoskeletal research.

Conclusions:

  • The study of pathogenic microbes offers significant insights into the molecular basis of infectious diseases.
  • Pathogen interactions with the cytoskeleton have unveiled fundamental aspects of normal cytoskeletal functions.
  • Pathogenesis research provides valuable tools for dissecting complex cellular processes.