Chlororespiratory Pathways and Their Physiological Significance
Chlororespiratory Pathways and Their Physiological Significance
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氯呼吸途径及其生理意义
DOI：
10.1007/978-1-4020-4061-0_12
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
P. Rich
中科院分区：
文献类型：
--
作者：
P. Nixon;P. Rich
现在有压倒性的证据表明，绿色植物的类囊体膜除了光合作用的电子转移复合体外，还包含一系列能够还原和氧化质醌池的呼吸复合体。这些“氯呼吸”酶包括NDH复合体，它与我在线粒体和真细菌中发现的复合体有关，以及叶绿体末端氧化酶(PTOX)，它是线粒体中发现的替代氧化酶家族中遥远的成员。此外，其他氯呼吸活性的分子基础，包括长期寻找的铁氧还蛋白：质醌还原酶(FQR)，与光系统1周围的循环电子流动有关，现在正在利用遗传学、生物化学和生物信息学的组合被发现。在这里，我们评估了各种氯呼吸途径的可能成分，并讨论了它们潜在的生理意义。新出现的图像表明，氯呼吸酶的主要作用，至少在成熟的叶绿体中，实际上并不是参与经典的呼吸链来驱动ATP的合成。相反，氯呼吸活性在光合作用的各个方面起着重要的辅助作用，包括围绕光系统1的循环电子流动、类胡萝卜素的生物合成和光保护。对非光合体中氯呼吸酶的检测表明，它们的活性并不局限于叶绿体。
There is now overwhelming evidence that the thylakoid membrane of green plants contains, in addition to the photosynthetic electron-transfer complexes, a set of respiratory complexes that are capable of reducing and oxidising the plastoquinone pool. These “chlororespiratory” enzymes include the Ndh complex, which is related to complex I found in mitochondria and eubacteria, and the plastid terminal oxidase (PTOX), which is a distant member of the family of alternative oxidases found in mitochondria. In addition the molecular basis of other chlororespiratory activities, including the long sought after ferredoxin:plastoquinone reductase (FQR), implicated in cyclic electron flow around photosystem one, are now being uncovered using a combination of genetics, biochemistry and bioinformatics. Here we assess the possible components of the various chlororespiratory pathways and discuss their potential physiological importance. The emerging picture suggests that the main role of chlororespiratory enzymes, at least in mature chloroplasts, is not actually to participate in a classical respiratory chain to drive ATP synthesis. Instead, chlororespiratory activities play important auxiliary roles in various aspects of photosynthesis including cyclic electron flow around photosystem one, carotenoid biosynthesis and photoprotection. The detection of chlororespiratory enzymes in non-photosynthetic plastids suggests that their activities are not restricted to the chloroplast.
从各种 c 型细胞色素到质体蓝素的电子转移的瞬时动力学。
影响因子：
2.9
作者：
Meyer,TE;Zhao,ZG;Cusanovich,MA;Tollin,G
通讯作者：
Tollin,G