Spectroscopy and Spectral Analysis, Volume. 34, Issue 12, 3297(2014)
Studies on the Interaction between Malanin and Metal Ions by Fluorescence Spectra Methods
A novel protein with anti-tumor activities named malanin was isolated and purified from an endemic plant in Yunnan and Guangxi provinces. Effects of copper ion, silver ion and calcium ion on malanin and apo-malanin fluorescence spectra were studied. The results showed that copper ion leads to obvious statistic quenching of malanin and apo-malanin fluorescence. The dissociation constant of them from malanin and apo-malanin were about 2.37×10-4 and 2.66×10-4 mol·L-1, respectively. The silver ion did not have quenching action on malanin fluorescence, but it had statistic quenching effect on apo-malanin fluorescence, and its dissociation constant was 2.37×10-4 mol·L-1. Calcium ion did not have quenching action on malanin and apo-malanin fluorescence. It plays an important role in keeping malanin natural conformation.
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YUAN Yan, ZHANG Wei, DAI Jian-hui, LIU Xiao-fang, WANG Hong-bin, Colin J Barrow, YANG Wen-rong. Studies on the Interaction between Malanin and Metal Ions by Fluorescence Spectra Methods[J]. Spectroscopy and Spectral Analysis, 2014, 34(12): 3297
Received: Sep. 11, 2013
Accepted: --
Published Online: Dec. 8, 2014
The Author Email: Yan YUAN (54988363@qq.com)