A novel protein family mediates Casparian strip formation in the endodermis

Daniele Roppolo, Bert De Rybel, Valérie Dénervaud Tendon, Alexandre Pfister, Julien Alassimone, Joop E. M. Vermeer, Misako Yamazaki, York-Dieter Stierhof, Tom Beeckman and Niko Geldner ()
Additional contact information
Daniele Roppolo: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
Bert De Rybel: Ghent University, Technologiepark 927, 9052 Ghent, Belgium
Valérie Dénervaud Tendon: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
Alexandre Pfister: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
Julien Alassimone: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
Joop E. M. Vermeer: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
Misako Yamazaki: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland
York-Dieter Stierhof: ZMBP, Mikroskopie, Universität Tübingen, Auf der Morgenstelle 5, 72076 Tübingen, Germany
Tom Beeckman: Ghent University, Technologiepark 927, 9052 Ghent, Belgium
Niko Geldner: Biophore, UNIL-Sorge, University of Lausanne, 1015 Lausanne, Switzerland

Nature, 2011, vol. 473, issue 7347, 380-383

Abstract: Cell wall structures in the plant root In plants, the endodermis is a root cell layer that separates outer from inner cell layers by virtue of the Casparian strips, hydrophobic modifications of the cell wall first noted by Robert Caspary in 1865. This region forms a network between cells within the layer to seal the extracellular space and thus functions like the tight junctions that provide seals between adjacent animal epithelial cells. In spite of their importance in nutrient uptake, little is known about the molecular factors that determine the formation and precise localization of Casparian strips. Roppolo et al. have now identified a novel family of transmembrane proteins called CASPs (Casparian strip membrane domain proteins) forming a ring-like domain within the endodermal plasma membrane that determines the position and structure of Casparian strips.

Date: 2011
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DOI: 10.1038/nature10070

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