Deciphering the molecular functions of sterols in cellulose biosynthesis

Kathrin Schrick, Seth DeBolt, Vincent Bulone

Research output: Contribution to journalReview articlepeer-review

32 Citations (Scopus)

Abstract

Sterols play vital roles in plant growth and development, as components of membranes and as precursors to steroid hormones. Analysis of Arabidopsis mutants indicates that sterol composition is crucial for cellulose biosynthesis. Sterols are widespread in the plasma membrane (PM), suggesting a possible link between sterols and the multimeric cellulose synthase complex. In one possible scenario, molecular interactions in sterol-rich PM microdomains or another form of sterol-dependent membrane scaffolding may be critical for maintaining the correct subcellular localization, structural integrity and/or activity of the cellulose synthase machinery. Another possible link may be through steryl glucosides, which could act as primers for the attachment of glucose monomers during the synthesis of β-(1 → 4) glucan chains that form the cellulose microfibrils. This mini-review examines genetic and biochemical data supporting the link between sterols and cellulose biosynthesis in cell wall formation and explores potential approaches to elucidate the mechanism of this association.

Original languageEnglish
Article number84
JournalFrontiers in Plant Science
Volume3
DOIs
Publication statusPublished - 3 May 2012
Externally publishedYes

Keywords

  • Cell wall
  • Cellulose
  • Lipid rafts
  • Plasma membrane microdomains
  • Sterols
  • Steryl glucosides

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