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首页> 外文期刊>Journal of Experimental Botany >Photosynthetic complex stoichiometry dynamics in higher plants: biogenesis, function, and turnover of ATP synthase and the cytochrome b(6)f complex
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Photosynthetic complex stoichiometry dynamics in higher plants: biogenesis, function, and turnover of ATP synthase and the cytochrome b(6)f complex

机译：高等植物的光合复杂化学计量动力学：ATP合酶和细胞色素b（6）f复合物的生物发生，功能和更新

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摘要

During plant development and in response to fluctuating environmental conditions, large changes in leaf assimilation capacity and in the metabolic consumption of ATP and NADPH produced by the photosynthetic apparatus can occur. To minimize cytotoxic side reactions, such as the production of reactive oxygen species, photosynthetic electron transport needs to be adjusted to the metabolic demand. The cytochrome b(6)f complex and chloroplast ATP synthase form the predominant sites of photosynthetic flux control. Accordingly, both respond strongly to changing environmental conditions and metabolic states. Usually, their contents are strictly co-regulated. Thereby, the capacity for proton influx into the lumen, which is controlled by electron flux through the cytochrome b(6)f complex, is balanced with proton efflux through ATP synthase, which drives ATP synthesis. We discuss the environmental, systemic, and metabolic signals triggering the stoichiometry adjustments of ATP synthase and the cytochrome b(6)f complex. The contribution of transcriptional and post-transcriptional regulation of subunit synthesis, and the importance of auxiliary proteins required for complex assembly in achieving the stoichiometry adjustments is described. Finally, current knowledge on the stability and turnover of both complexes is summarized.
机译：在植物发育过程中以及响应不断变化的环境条件，光合装置产生的叶片同化能力以及ATP和NADPH的代谢消耗可能发生较大变化。为了使细胞毒性副反应（例如活性氧的产生）最小化，需要将光合电子传输调节至代谢需求。细胞色素b（6）f复合物和叶绿体ATP合酶形成光合作用通量控制的主要站点。因此，两者都对变化的环境条件和代谢状态有强烈的反应。通常，它们的内容受到严格的共同监管。因此，质子流入管腔的能力由通过细胞色素b（6）f复合物的电子通量控制，与通过ATP合酶驱动质子合成的质子外流平衡。我们讨论了触发ATP合酶和细胞色素b（6）f复杂的化学计量调整的环境，全身和代谢信号。描述了亚基合成的转录和转录后调控的贡献，以及实现化学计量调整所需的复杂装配所需的辅助蛋白的重要性。最后，总结了有关两种配合物的稳定性和周转率的最新知识。

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