交替氧化酶结构和功能研究进展  

Research Advances in the Structure and Function of Alternative Oxidase

作　　者：雷韬[1] 袁澍[1] 刘文娟[1] 梁厚果[1] 林宏辉[1] 

机构地区：[1]四川大学生命科学学院生物资源与生态环境教育部重点实验室,成都610064

出　　处：《西北植物学报》2006年第3期649-654,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金项目(30170081);教育部博士点基金项目(20040610015);四川省科技厅基金项目(04ZQ026-036);四川省留学回国人员基金项目

摘　　要：交替氧化酶(a lternative ox idase,AOX)是植物线粒体呼吸链中抗氰呼吸途径(cyan ide-res istan t resp irationpathw ay)的末端氧化酶,它广泛存在于高等植物及部分真菌和藻类中。交替氧化酶是一种双铁羧基蛋白(d i-ironcarboxy late prote in),它不仅具有其它双铁羧基蛋白共有的结构特点以及去除分子氧的功能,更重要的是它还可以通过改变自身结构等方式来主动调节抗氰呼吸途径的运行程度,进而调节细胞多方面的代谢和功能,以适应环境条件的改变,增强植物适应各种逆境的能力,调节植物生长速率,并与细胞凋亡和光合作用相关。本文主要对交替氧化酶的结构与其在植物体内功能的最新研究进展进行综述。Alternative oxidase is the terminal oxidase in the cyanide-resistant respiration pathway in plant mitochondria,which widely existing in higher plants and parts of fungi and algae. As a di-iron carboxylate protein, Alternative oxidase possesses the structural characters shared by other di-iron carboxylate proteins and the function of removing molecular oxygen,and more importantly it is capable of regulating the operation of the cyanide-resistant respiration by changing its own structure to change many cellular metabolisms and functions to adapt to environmental changes,thereby enhancing various capabilities of a plant to resist adverse environments ,and adjusting the growth rate of the plant;furthermore, it is related to cellular dying and photosynthesis. The paper mainly summarizes the latest research advances about the structure and functions of alternative oxidase in plant bodies.

关 键 词：抗氰呼吸 交替氧化酶 双铁羧基蛋白 胁迫环境 

分 类 号：Q946.5[生物学—植物学]