Skip to main content
SLU publication database (SLUpub)
Research article - Peer-reviewed, 2014

The Cellulase KORRIGAN Is Part of the Cellulose Synthase Complex

Vain, Thomas; Crowell, Elizabeth Faris; Timpano, Helene; Biot, Eric; Desprez, Thierry; Mansoori, Nasim; Trindade, Luisa M.; Pagant, Silvere; Robert, Stephanie; Hoefte, Herman; Gonneau, Martine; Vernhettes, Samantha


Plant growth and organ formation depend on the oriented deposition of load-bearing cellulose microfibrils in the cell wall. Cellulose is synthesized by a large relative molecular weight cellulose synthase complex (CSC), which comprises at least three distinct cellulose synthases. Cellulose synthesis in plants or bacteria also requires the activity of an endo-1,4-beta-D-glucanase, the exact function of which in the synthesis process is not known. Here, we show, to our knowledge for the first time, that a leaky mutation in the Arabidopsis (Arabidopsis thaliana) membrane-bound endo-1,4-beta-D-glucanase KORRIGAN1 (KOR1) not only caused reduced CSC movement in the plasma membrane but also a reduced cellulose synthesis inhibitor-induced accumulation of CSCs in intracellular compartments. This suggests a role for KOR1 both in the synthesis of cellulose microfibrils and in the intracellular trafficking of CSCs. Next, we used a multidisciplinary approach, including live cell imaging, gel filtration chromatography analysis, split ubiquitin assays in yeast (Saccharomyces cerevisiae NMY51), and bimolecular fluorescence complementation, to show that, in contrast to previous observations, KOR1 is an integral part of the primary cell wall CSC in the plasma membrane.

Published in

Plant Physiology
2014, Volume: 165, number: 4, pages: 1521-1532

    UKÄ Subject classification

    Developmental Biology
    Cell Biology

    Publication Identifiers


    Permanent link to this page (URI)