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Related Concept Videos

The Role of Actin and Myosin in Non-muscle Cells01:10

The Role of Actin and Myosin in Non-muscle Cells

Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They  are held...
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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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Supracellular actomyosin assemblies during development.

Katja Röper1

  • 1MRC-Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK. kroeper@mrc-lmb.cam.ac.uk

Bioarchitecture
|June 14, 2013
PubMed
Summary

Actomyosin cables, supracellular networks of actin and myosin, drive cell shape changes crucial for tissue development. These structures, particularly circumferential cables, are vital for processes like tube formation in the Drosophila embryo.

Keywords:
ActomyosinDrosophilaanisotropycabledevelopmentmorphogenesiswound healing

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Area of Science:

  • Cell biology
  • Developmental biology
  • Biophysics

Background:

  • Cell shape changes are fundamental to tissue morphogenesis.
  • Actomyosin networks, particularly actomyosin cables, are key regulators of these cellular dynamics.
  • These cables have diverse roles in development, wound healing, and tissue maintenance.

Purpose of the Study:

  • To summarize general principles of actomyosin cable function.
  • To highlight the role of circumferential actomyosin cables in tube formation.
  • To provide insights into the biophysical mechanisms underlying cable-mediated morphogenesis.

Main Methods:

  • Review of existing literature on actomyosin cables.
  • Analysis of supracellular actomyosin arrangements in the Drosophila embryo.
  • Focus on cellular and subcellular localization of actomyosin networks.

Main Results:

  • Actomyosin cables are specialized supracellular structures spanning multiple cell diameters.
  • Circumferential actomyosin cables play a critical role in assisting tube formation.
  • These cables contribute to epithelial morphogenesis and developmental processes.

Conclusions:

  • Actomyosin cables represent a conserved mechanism for generating force and driving tissue morphogenesis.
  • Understanding these structures provides insights into fundamental developmental processes.
  • Further research into actomyosin cable dynamics can illuminate mechanisms of tissue formation and repair.