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Structure and assembly of hemidesmosomes

J C Jones1, S B Hopkinson, L E Goldfinger

  • 1Cell and Molecular Biology, Northwestern University Medical School, Chicago, IL 60611, USA. j-jones3@nwu.edu

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|August 12, 1998
PubMed

Insights

Hemidesmosomes anchor epithelial cells to the basement membrane via complex protein interactions. Their assembly, triggered by laminin-5, involves alpha 6 beta 4 integrin and is crucial for cell adhesion and preventing blistering diseases.

Area of Science:

  • Cell biology
  • Biochemistry
  • Biophysics

Background:

  • Hemidesmosomes are complex cell junctions essential for epithelial adhesion.
  • They link the keratin cytoskeleton to the extracellular matrix via transmembrane proteins.
  • Disruption of hemidesmosomes is associated with blistering diseases.

Purpose of the Study:

  • To review the current understanding of hemidesmosome structure and assembly.
  • To explore the role of alpha 6 beta 4 integrin in hemidesmosome function.
  • To discuss the signaling capabilities of hemidesmosomes.

Main Methods:

  • Literature review of hemidesmosome research.
  • Analysis of cell culture models investigating hemidesmosome assembly.
  • Examination of protein interactions and signaling pathways.

Main Results:

  • Hemidesmosome assembly is initiated by extracellular matrix components, notably laminin-5.
  • Laminin-5 binding induces phosphorylation/dephosphorylation of alpha 6 beta 4 integrin subunits.
  • These integrin modifications are critical for cytoskeletal anchorage.
  • Hemidesmosomes facilitate signal transduction through the alpha 6 beta 4 integrin.

Conclusions:

  • Hemidesmosomes are dynamic structures vital for epithelial integrity and cell signaling.
  • Understanding hemidesmosome assembly and function is key to addressing related diseases.
  • Further research into alpha 6 beta 4 integrin signaling is warranted.

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