Sitosterol-β-glucoside as Primer for Cellulose Synthesis in Plants

By Liangcai Peng, Y. Kawagoe, Pat Hogan, D. Delmer. Science, 2002

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Phylogenetic Analysis of the Plant Endo-β-1,4-Glucanase Gene Family (2004, background): “It has been proposed that the function of KOR in cellulose synthesis is to cleave sitosterol-b-glucoside, reputed to be the primer for cellulose synthesis in plants, from the growing polymer chain ( Peng et al. 2002 ).”
Plant cell walls: the skeleton of the plant world (2010, background): “The exact biochemical activity of each CesA isoform, although speculated upon (Read and Bacic 2002), has not yet been shown experimentally apart from one instance in which yeastexpressed GhCesA1 was able to convert sitosterol-b-glucoside to sitosterol cellodextrins, thus confirming their ability to ”
Growth of the plant cell wall (2005, background): “Sterols are common lipid components of plant cell membranes and sterol-β-glucosides are commonly synthesized in plant plasma membranes, where CESA can use a sterol-glucoside and uridine 5′-diphosphate-glucose to form short sterol-linked glucan”
Cellulose synthesis in maize: isolation and expression analysis of the cellulose synthase (CesA) gene family (2004, background): “Alternatively, it could cleave sterol from the sterol-glucoside primer that has been reported to initiate glucan chain formation for subsequent extension by the plant CesA proteins located in rosettes (Molhoj et al. 2002; Peng et al. 2002 ).”