The Golgi localized bifunctional UDP-rhamnose/UDP-galactose transporter family of Arabidopsis

Carsten Rautengarten, Berit Ebert, Ignacio Moreno, Henry Temple, Thomas Herter, Bruce Link, Daniela Donas-Cofre, Adrian Moreno, Susana Saez-Aguayoc, Francisca Blanco, Jennifer C. Mortimer, Alex Schultink, Wolf-Dieter Reiter, Paul Dupree, Markus Pauly, Joshua L. Heazlewood, Henrik V. Scheller, Ariel Orellana

64 Citationer (Scopus)

Abstract

Delivery of nucleotide sugar substrates into the Golgi apparatus and endoplasmic reticulum for processes such as cell wall biosynthesis and protein glycosylation is critical for plant growth and development. Plant genomes encode large families of uncharacterized nucleotide sugar transporters that are specifically presumed to deliver the diverse array of nucleotide sugars found in plants. This study has developed a novel approach that enabled functional characterization of six bifunctional UDP-rhamnose (Rha)/UDP-galactose (Gal) transporters from Arabidopsis. An analysis of loss-of-function and overexpression lines for two of these transporters identified biochemical alterations supporting their roles in the biosynthesis of Rha- and Gal-containing polysaccharides. Thus, cell wall polysaccharide biosynthesis in the Golgi apparatus of plants is likely also regulated by substrate transport mechanisms.
OriginalsprogEngelsk
TidsskriftProceedings of the National Academy of Sciences of the United States of America
Vol/bind111
Udgave nummer31
Sider (fra-til)11563-11568
Antal sider6
ISSN0027-8424
DOI
StatusUdgivet - 5 aug. 2014

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