过氧体硫酸盐氧化酶 (SOX) 是高层植物中NO的替代来源,通过H2S进行上调
Francisco J Corpas1, Jorge Taboada1, Beatriz Sánchez-Romera1
1Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Granada, Spain.
Plant physiology and biochemistry : PPB
|May 13, 2025
概括
植物过氧体硫酸盐氧化酶 (SOX) 从酸盐中产生氧化 (NO). 这种NO生产受到硫化和过氧化的影响,为植物信号提供了新的见解.
科学领域:
- 植物生物化学 植物生物化学
- 植物生理学 植物生理学
- 亚氧化代谢的发生.
背景情况:
- 氧化 (NO) 是植物内源性自由基,但其酶源受到争议.
- 植物的过氧体参与了氧化代谢.
- 硫酸盐氧化酶 (SOX) 是一种过氧体酶,氧化硫酸盐到硫酸盐,产生过氧化 (H2O2).
研究的目的:
- 研究植物硫酸盐氧化酶 (SOX) 产生氧化 (NO) 的潜力.
- 探索过氧体在植物中NO合成中的作用.
- 了解H2O2,NO和硫化 (H2S) 在植物新陈代谢中的相互作用.
主要方法:
- 再组合胡 (Capsicum annuum L.) 硫酸氧化酶 (SOX) 的复制.
- 使用电子偏磁共振 (EPR) 光谱与自旋捕捉检测NO生成.
- 评估硫化 (H2S) 和过氧化 (H2O2) 对生产的影响.
主要成果:
- 再组合胡SOX从酸盐 (NO2-) 产生NO,使用NADH作为电子捐赠体.
- 由SOX产生的NO的产生由H2S上调.
- 由SOX产生的NO生成被H2O2.2降低调节.
结论:
- 植物过氧体硫酸盐氧化酶 (SOX) 是一种新的氧化物 (NO) 酶源.
- 通过SOX介导的NO生产是由H2S和H2O2调节的,这表明一个复杂的监管网络.
- 这一发现为高层植物中NO合成的酶途径提供了新的见解,特别是在过氧体内.
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