Photosynthetic redox control of nuclear gene expression
Photosynthetic redox control of nuclear gene expression
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DOI：
10.1093/jxb/eri180
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发表时间：
2005-06-01
影响因子：
6.9
通讯作者：
Pfannschmidt, T
中科院分区：
文献类型：
--
作者：
Fey, V;Wagner, R;Pfannschmidt, T
叶绿体含有 3000-4000 种不同的蛋白质，但只有一小部分在质体基因组中编码，而大部分在细胞核中编码。因此，这些基因的表达需要细胞核和叶绿体之间的高度协调。这是通过两个区室之间的双边信息交换来实现的，包括核到质体（顺行）和质体到核（逆行）信号。后者代表一种功能反馈控制，它将核编码质体蛋白的表达与细胞器的实际功能状态耦合起来。在这种情况下，光合作用的效率是一个非常重要的参数，因为它受到许多环境条件的影响，因此代表了居住环境的传感器。光合电子传递链的组成部分根据光合电子流在还原/氧化（氧化还原）状态方面表现出显着变化，因此可作为报告环境对光合作用影响的信号参数。这种氧化还原信号控制叶绿体和核基因表达事件，并在两个遗传区室的协调中发挥重要作用。本文讨论已知哪些光合参数控制核基因表达，这些信号如何转导至细胞核，以及它们如何与其他质体逆行信号和胞质光感知系统相互作用。
Chloroplasts contain 3000-4000 different proteins but only a small subset of them is encoded in the plastid genome while the majority is encoded in the nucleus. Expression of these genes therefore requires a high degree of co-ordination between nucleus and chloroplast. This is achieved by a bilateral information exchange between both compartments including nucleus-to-plastid (anterograde) and plastid-to-nucleus (retrograde) signals. The latter represent a functional feedback control which couples the expression of nuclear encoded plastid proteins to the actual functional state of the organelle. The efficiency of photosynthesis is a very important parameter in this context since it is influenced by many environmental conditions and therefore represents a sensor for the residing environment. Components of the photosynthetic electron transport chain exhibit significant changes in their reduction/oxidation (redox) state depending on the photosynthetic electron flow and therefore serve as signalling parameters which report environmental influences on photosynthesis. Such redox signals control chloroplast and nuclear gene expression events and play an important role in the co-ordination of both genetic compartments. It is discussed here which photosynthetic parameters are known to control nuclear gene expression, how these signals are transduced toward the nucleus, and how they interact with other plastid retrograde signals and cytosolic light perception systems.