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首页> 外文期刊>Trends in Plant Science >Not just a circle: flux modes in the plant TCA cycle
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Not just a circle: flux modes in the plant TCA cycle

机译:不只是一个圆圈:工厂TCA循环中的通量模式

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摘要

The tricarboxylic acid (TCA) cycle is one of the iconic pathways in metabolism. The cycle is commonly thought of in terms of energy metabolism, being responsible for the oxidation of respiratory substrates to drive ATP synthesis. However, the reactions of carboxylic acid metabolism are embedded in a larger metabolic network and the conventional TCA cycle is only one way in which the component reactions can be organised. Recent evidence from labelling studies and metabolic network models suggest that the organisation of carboxylic acid metabolism in plants is highly dependent on the metabolic and physiological demands of the cell. Thus, alternative, non-cyclic flux modes occur in leaves in the light, in some developing oilseeds, and under specific physiological circumstances such as anoxia.
机译:三羧酸(TCA)循环是新陈代谢的标志性途径之一。通常根据能量代谢来考虑该循环,该循环负责呼吸底物的氧化以驱动ATP合成。然而,羧酸代谢的反应被嵌入到更大的代谢网络中,而常规的TCA循环仅是组成组分反应的一种方式。标记研究和代谢网络模型的最新证据表明,植物中羧酸代谢的组织高度依赖于细胞的代谢和生理需求。因此,在光中,某些发育中的油料种子中以及特定的生理环境(例如缺氧)下,叶片会出现替代性的非循环通量模式。

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