高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (5): 979.

• 研究快报 • 上一篇    下一篇

类囊体膜光系统Ⅱ中超氧阴离子生成机制的研究

孙健, 刘科, 徐英凯, 陈中伟, 刘扬   

  1. 中国科学院化学研究所分子科学中心, 分子动态和稳态结构国家重点实验室, 北京 100080
  • 收稿日期:2001-09-15 出版日期:2002-05-24 发布日期:2002-05-24
  • 通讯作者: 刘扬(1958年出生),男,博士,研究员,博士生导师,主要从事生物电子转移过程中的自由基研究及其超分子化学模拟.E-mail:yliu@infoc3.icas.ac.cn E-mail:yliu@infoc3.icas.ac.cn
  • 基金资助:

    国家重点基础规划项目(批准号:G1998010100);国家自然科学基金(批准号:39890390,39870208)资助.

Studies on Superoxide Formation in Photosystem Ⅱ with a Novel Spin Trap

SUN Jian, LIU Ke, XU Ying-Kai, CHEN Zhong-Wei, LIU Yang   

  1. State Key Lab for Structural Chemistry of Unstable and Stable Species, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2001-09-15 Online:2002-05-24 Published:2002-05-24

关键词: 超氧阴离子自由基, 光系统Ⅱ, 活性氧, 自旋捕捉-ESR

Abstract: Under strong illumination, photosystem Ⅱ (PS Ⅱ )of higher plant was active in superoxide production.However, it keeps unclear about the mechanisms and sites of superoxide formation by PS Ⅱ .Concerning above questions, the molecular mechanisms of superoxide formation by PS IIfrom spinach in this work has been studied.The site range for possible superoxide formation by PS Ihas been constricted by the study on the donor or acceptor inhibited PS Ipreparation.The results indicated that the plasto-quinones located at QA and QB of PS Ⅱ was the primary site responsible for superoxide formation.

Key words: Superoxide anion radical, Photosystem Ⅱ, Reactive oxygen species, Spin trapping-ESR

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