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Related Experiment Videos

Expansins.

M W Shieh1, D J Cosgrove

  • 1Department of Biology, Pennsylvania State University, University Park 16802, USA.

Journal of Plant Research
|September 7, 2001
PubMed
Summary
This summary is machine-generated.

Plant cell wall loosening proteins called expansins enable wall expansion by altering rheology. New expansin families and gene expression reveal broader developmental roles in plant growth.

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Area of Science:

  • Plant Biology
  • Biochemistry
  • Molecular Biology

Background:

  • The acid-growth hypothesis explains plant cell wall expansion.
  • Expansins are key proteins involved in cell wall loosening.

Purpose of the Study:

  • To investigate the biochemical function and developmental roles of expansins.
  • To explore the molecular mechanisms underlying expansin activity.

Main Methods:

  • Biochemical assays to study protein function.
  • Molecular sequence analysis of expansin proteins.
  • Gene expression analysis in plant tissues.

Main Results:

  • Expansins were isolated as a new class of wall-loosening proteins.

Related Experiment Videos

  • Expansins alter cell wall rheology by facilitating microfibril-matrix sliding.
  • Biochemical data suggest disruption of noncovalent bonds, not glycosyl transferase activity.
  • New expansin families and expression in fruit and cotton fibers were identified.

    • Conclusions:

    • Expansins play crucial roles in plant cell wall expansion and development.
    • Expansins function by disrupting noncovalent interactions within the cell wall.
    • The discovery of new expansin families expands understanding of their diverse functions.