| Literature DB >> 26340317 |
Morten Egevang Jørgensen1,2, Carl Erik Olsen2, Barbara Ann Halkier1,2, Hussam Hassan Nour-Eldin1,2.
Abstract
Little is known about how plants regulate transporters of defense compounds. In A. thaliana, glucosinolates are transported between tissues by NPF2.10 (AtGTR1) and NPF2.11 (AtGTR2). Mining of the PhosPhat4.0 database showed two cytosol exposed phosphorylation sites for AtGTR1 and one membrane-buried phosphorylation site for AtGTR2. In this study, we investigate whether mutation of the two potential regulatory sites of AtGTR1 affected transport of glucosinolates in Xenopus oocytes. Characterization of AtGTR1 phosphorylation mutants showed that phosphorylation of AtGTR1 - at the two reported phosphorylation sites - is not directly involved in regulating AtGTR1 transport activity. We hypothesize a role for AtGTR1-phosphorylation in regulating protein-protein interactions.Entities:
Keywords: NPF2.10 and NPF2.11; POTs; Xenopus laevis; glucosinolate transport; membrane transport; phosphorylation mimicking and transporter regulation; secondary active transport; transport phosphorylation
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Year: 2016 PMID： 26340317 PMCID： PMC4883914 DOI： 10.1080/15592324.2015.1071751
Source DB: PubMed Journal: Plant Signal Behav ISSN： 1559-2316