The maize root plasma membrane H+-ATPase is regulated by a sugar-induced transduction pathway

被引:22
作者
Camoni, Lorenzo [1 ]
Marra, Mauro [1 ]
Garufi, Alessandra [1 ]
Visconti, Sabina [1 ]
Aducci, Patrizia [1 ]
机构
[1] Univ Roma Tor Vergata, Dept Biol, I-00133 Rome, Italy
关键词
14-3-3; proteins; H+-ATPase; signal transduction; sugar sensing; Zea mays;
D O I
10.1093/pcp/pcj046
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
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.
引用
收藏
页码:743 / 747
页数:5
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