AtDUR3 encodes a new type of high-affinity urea/H+ symporter in Arabidopsis

From: Plant Cell | Date: March 1, 2003| Author: | Copyright information

Urea is the major nitrogen form supplied as fertilizer in agricultural plant production but also an important nitrogen metabolite in plants. We report the cloning and functional characterization of AtDUR3, a high-affinity urea transporter in plants. AtDUR3 contains 14 putative transmembrane-spanning domains and represents an individual member in Arabidopsis that belongs to a superfamily of sodium-solute symporters. Heterologous expression in urea uptake-defective yeast as well as two-electrode voltage clamp and uptake studies using ^sup 14^C-labeled urea in AtDUR3-expressing oocytes ...

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