Role of the phosphoinositide pathway in the light-dependent C4 phosphoenolpyruvate carboxylase phosphorylation cascade in Digitaria sanguinalis protoplasts
Role of the phosphoinositide pathway in the light-dependent C4 phosphoenolpyruvate carboxylase phosphorylation cascade in Digitaria sanguinalis protoplasts
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DOI：
10.1042/bst0280821
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发表时间：
2000-12-01
影响因子：
3.9
通讯作者：
Vidal, J
中科院分区：
文献类型：
--
作者：
Coursol, S;Pierre, JN;Vidal, J
在动物细胞中，刺激-反应偶联通常涉及PtdIns(4，5)P-2的水解，而PtdIns(4，5)P-2是由磷脂酰肌醇特异性磷脂酶C(PI-PLC)催化的。有越来越多的证据表明PI-PLC在植物细胞中的信号传递；然而，该系统在植物中的生理作用仍然缺乏文献报道。我们的数据首次证明，基于PI-PLC的信号系统是控制C-4磷酸烯醇式丙酮酸羧化酶(PEPC)磷酸化状态的转导链中的关键步骤，该酶的调节是C-4植物吸收大气中二氧化碳的核心。
Stimulus-response coupling in animal cells frequently involves the hydrolysis of PtdIns(4,5)P-2 which is catalysed by phosphoinositide-specific phospholipase C (PI-PLC). There is an increasing body of evidence for PI-PLC-based signalling in plant cells; however, the physiological role of this system remains poorly documented in plants. Our data provide the first evidence that a PI-PLC-based signalling system is a committed step in the transduction chain controlling the phosphorylation state of C-4 phosphoenolpyruvate carboxylase (PEPC), the regulation of which is central to the assimilation of atmospheric CO2 in C-4 plants.