高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (3): 424.

• 研究论文 • 上一篇    下一篇

过氧亚硝酸诱导生成硫中心自由基的荧光表征

党亚敏,郭祥群   

  1. 教育部现代分析科学重点实验室,化学生物学福建省重点实验室,厦门大学化学系,厦门 361005
  • 收稿日期:2005-06-27 出版日期:2006-03-10 发布日期:2006-03-10
  • 通讯作者: 郭祥群(1955年出生),女,教授,从事分子光谱分析研究. E-mail: xqguo@jingxian.xmu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20375032)资助.

Fluorescent Characterization of Peroxynitrite-induced Thiyl  Radicals

DANG Ya-Min,GUO Xiang-Qun*   

  1. Department of Chemistry,the Key Laboratory of Analytical Science of MOE,
     Xiamen University,Xiamen 361005,China
  • Received:2005-06-27 Online:2006-03-10 Published:2006-03-10

摘要:

将4-羟基-2,2,6,6-四甲基哌啶氮氧自由基用于标记9-羧基-吖啶,得到自旋标记荧光探针4-(9-吖啶酯)-2,2,6,6-四甲基哌啶氮氧自由基. 以谷胱甘肽作为蛋白质肽模型,研究了活性氧过氧亚硝酸诱导其损伤产生的硫中心自由基的荧光表征. 自旋标记荧光探针为弱荧光物质,当与硫中心自由基作用后,导致其荧光增强,从而可对硫中心自由基进行表征.

关键词: 自旋标记; 荧光探针; 硫自由基; 过氧亚硝酸

Abstract:

A spin-labeling fluorophore(Ac-Tempo·),formed by combining with an acridine with a paramagnetic nitroxide(4-hydroxyl-2,2,6,6-tetramethylpiperidinyl-1-oxy),was explored for peptide-based thiyl radicals generated through the reaction between gluththione and peroxynitrite. Ac-Tempo·,a weak fluorescent compound,showed a dramatic increase in fluorescence intensity after interaction with thiyl radicals,and could be employed to probe peptide-based thiyl radicals.

Key words: Spin-labeling; Fluorescent probe; Thiyl Radical; Peroxynitrite

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