Arabidopsis BSD2 reveals a novel redox regulation of Rubisco physiology in vivo
Arabidopsis BSD2 reveals a novel redox regulation of Rubisco physiology in vivo
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拟南芥 BSD2 揭示了体内 Rubisco 生理学的新型氧化还原调节
DOI：
10.1080/15592324.2020.1740873
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发表时间：
2020
影响因子：
2.9
通讯作者：
Atsushi Sakamoto & Hiroshi Shimada
中科院分区：
文献类型：
--
作者：
Jun Tominaga;Shunichi Takahashi;Atsushi Sakamoto & Hiroshi Shimada
植物需要光能来驱动光合作用，但过量的能量导致有害的活性氧（ROS）的产生，导致目标酶的氧化失活，包括光合CO2固定酶，核酮糖1，5-二磷酸羧化酶/加氧酶（Rubisco）。在体外实验中已经证明，氧化失活的Rubisco可以通过加入还原剂而被重新激活。Busch等人（在The Plant Journal，doi：10.1111/tpj.14617，2020）最近证明，鞘缺陷2（BSD 2），一种基质靶向蛋白，以前被称为Rubisco生物合成的后期组装伴侣，可以负责体内的这种再激活。在这里，我们提出了一个新的氧化还原调节Rubisco活性的工作模型。Rubisco的氧化还原可能是提高光合作用的新靶点。
Plants need light energy to drive photosynthesis, but excess energy leads to the production of harmful reactive oxygen species (ROS), resulting in oxidative inactivation of target enzymes, including the photosynthetic CO2-fixing enzyme, ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco). It has been demonstratedin vitrothat oxidatively inactivated Rubisco can be reactivated by the addition of reducing agents. Busch et al. (in The Plant Journal, doi: 10.1111/tpj.14617, 2020) recently demonstrated that bundle-sheath defective 2 (BSD2), a stroma-targeted protein formerly known as a late-assembly chaperone for Rubisco biosynthesis, can be responsible for such reactivationin vivo. Here, we propose a working model of the novel redox regulation in Rubisco activity. Redox of Rubisco may be a new target for improving photosynthesis.