植物谷胱甘肽过氧化物酶(GPX)研究进展

Research Progress on GPX in Plants

逆境胁迫会诱导植物产生过多的活性氧(ROS),引起氧化胁迫,严重影响其生长发育。相应地,植物为适应诸多不良环境会产生多种抗氧化剂、抗氧化酶等协调氧化还原平衡,其中谷胱甘肽过氧化物酶(glutathione peroxidase,GPX)是植物体内重要的抗氧化酶之一。对近年来植物中GPX的结构、亚细胞定位、酶催化底物特点及作用研究进展进行综述,并对未来可能的研究方向进行展望。

Adverse stress induces plants to produce excessive reactive oxygen species （ ROS ）, which can cause oxidative stress, and seriously affect their growth and development. Accordingly, plants produce a variety of antioxidants and antioxidant enzymes adjusting redox balance in order to adapt to many adverse environments. Glutathione peroxidase （ GPX ） is one of the most important antioxidant enzymes in plant. In this paper, recent research progresses on structure characteristics, subcellular localization, substrate specificity and functions of GPX are mainly reviewed, and finally the future research directions are prospected.