Light-regulated nucleo-cytoplasmic partitioning of phytochromes
Light-regulated nucleo-cytoplasmic partitioning of phytochromes
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DOI：
10.1093/jxb/erm145
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发表时间：
2007-10-01
影响因子：
6.9
通讯作者：
Nagy, Ferenc
中科院分区：
文献类型：
--
作者：
Kevei, Eva;Schafer, Eberhard;Nagy, Ferenc
光敏色素光受体通过调节占整个植物转录组10% - 30%的基因的表达模式，在植物从种子萌发到开花的整个生命周期中调控其发育、生长和适应性。因此，对光敏色素控制的信号转导级联的组成成分的鉴定以及对其分子机制的阐明已经引起了相当大的关注。光敏色素控制的信号传导是一个复杂的细胞过程；它始于光诱导的光受体分子内构象变化，并包括信号成分以及光受体自身的受调控的分配和降解。在这篇综述中，总结了有关光敏色素依赖光质和光量的核质分配的现有数据，并讨论了含有光敏色素的核复合物（称为核体）在红光/远红光诱导的信号传导中的可能功能。
Phytochrome photoreceptors regulate development, growth, and fitness throughout the entire life-cycle of plants, from seed germination to flowering, by regulating expression patterns of similar to 10-30% of the entire plant transcriptome. Identification of components and elucidation of the molecular mechanisms underlying phytochrome-controlled signal transduction cascades have therefore attracted considerable attention. Phytochrome-controlled signalling is a complex cellular process; it starts with the light-induced intramolecular conformational change of the photoreceptor and includes regulated partitioning and degradation of signalling components and of the photoreceptors themselves. In this review, the data available about light quality- and quantity-dependent nucleo-cytoplasmic partitioning of phytochromes is summarized and the possible function of phytochrome-containing nuclear complexes, termed nuclear bodies, in red/far-red light-induced signalling is discussed.