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1: Plant Cell Physiol. 2006 Jun;47(6):743-7. Epub 2006 Apr 13.
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The maize root plasma membrane H(+)-ATPase is regulated by a sugar-induced transduction pathway.

Camoni L, Marra M, Garufi A, Visconti S, Aducci P.

Department of Biology, University of Rome 'Tor Vergata', via della Ricerca Scientifica, 00133 Rome, Italy.

H(+)-ATPase, the key enzyme for the energization of ion and nutrient transport across the plasma membrane, is activated by phosphorylation-dependent 14-3-3 binding. Since the involvement of 14-3-3 proteins in sugar sensing-regulated processes has recently emerged, here we address the question as to whether sugar sensing plays a role in the regulation of H(+)-ATPase. The data reported here show that sugar depletion inhibits the association of 14-3-3 proteins with H(+)-ATPase by hampering phosphorylation of the 14-3-3 binding site of the enzyme. By using non-metabolizable disaccharides, we show that H(+)-ATPase regulation by 14-3-3 proteins can involve a specific sugar perception and transduction mechanism.

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PMID: 16614095 [PubMed - indexed for MEDLINE]