影像科学与光化学 ›› 1994, Vol. 12 ›› Issue (3): 221-228.DOI: 10.7517/j.issn.1674-0475.1994.03.221

• 研究论文 • 上一篇    下一篇

磺化竹红菌素对蛋白质荧光猝灭机理的研究

乐嘉昌1, 杜长征1, 庞素珍1, 安静仪2, 蒋丽金2   

  1. 1. 中国科学院生物物理研究所, 北京100101;
    2. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1993-06-25 修回日期:1993-09-21 出版日期:1994-08-20 发布日期:1994-08-20
  • 通讯作者: 乐嘉昌
  • 基金资助:
    中国科学院感光化学研究所光化学开放实验室资助

STUDIES OF QUENCHING OF PROTEIN FLUORESCENCE BY SULPHATED HYPOCRELLIN

YUE JIA-CHANG1, DU CHANG-ZHENG1, PANG SU-ZHEN1, AN JING-YI2, JIANG LI-JIN2   

  1. 1. Institue of Biophysics, Academia Sinicca, Beijing 100101, P.R. China;
    2. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P.R. China
  • Received:1993-06-25 Revised:1993-09-21 Online:1994-08-20 Published:1994-08-20

摘要: 本文详细研究了磺化竹红菌素对多种蛋白质在溶液状态下的荧光猝灭过程。结果表明,磺化竹红菌素对多种蛋白质荧光猝灭服从Stern-Volmer曲线,实验观察了温度、粘度、pH值和盐酸胍对荧光猝灭过程的影响。由于磺化竹红菌素是一两性分子,对于不同蛋白具有不同猝灭过程;磺化竹红菌素对蛋白质的荧光猝灭常数Kq在1013mol/L·s-1左右,这说明,磺化竹红菌素是一种比其它蛋白质荧光猝灭剂更加有效的荧光猝灭剂。

关键词: 荧光猝灭, 蛋白质, 竹红菌素

Abstract: This papre studies quenching of proteins fluorescence by sulphated Hypocrellin(HA-SO3).The experimental results show that the quenching of protein fluorescence by sul-phated Hypocrellin follows the classical Stern-Volmer equation. The variations of other conditions such as temperatures,viscosities,pH,guanidine-HCl ionic strength were also investigated.The sulphated Hypocrellin is an amphibious molecule with hydrophobic and hydrophilic.The quenching of various proteins may be at different mechanism;The quench fluorescence of protein tryphanyl residues is relatively large rate constant(the Kq values rang from 1-2 × 1013mol/L·s-1).All results also show that HA-SO3 is a more efficientquencher than others.

Key words: fluorescence quenching, protein, hypocrellin