Interactions of Cd Ions with Salmon Sperm DNA

Chemical Research in Chinese Universities ›› 2002, Vol. 18 ›› Issue (4): 430-432.

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Interactions of Cd Ions with Salmon Sperm DNA

CHEN Xia², JIN Jian¹, YANG Wen-sheng¹, JIANG Lin¹, XU Li¹, LI Tie-jin¹

1. College of Chemistry, Jilin University, Changchun 130023, P. R. China;
2. College of Life Science, Jilin University, Changchun 130023, P. R. China

Received:2001-06-22 Online:2002-12-24 Published:2011-08-04
Supported by:
Supported by the National Natural Science Foundation of China (No.60171022) and Natural Science Foundation of Jilin Province (No.990544).

Abstract

Abstract: The effect of Cd ions on salmon sperm DNA was studied by means of circular dichroism(CD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and fluorescence spectroscopy. The CD spectral and fluorescent probe-acriflavine results indicate that the DNA underwent a conformation change upon the addition of Cd ions. XPS and Raman studies reveal that there existed interactions between Cd ions and the phosphate groups of the DNA. In addition, a new band appeared at 803 cm^-1in the Raman spectra, which can be attributed to characterizing "marker" band of A-DNA. It is concluded that Cd ions can be coordinated by the phosphate groups of the DNA and induce the conformation changes of the DNA from B-DNA to A-DNA.

Key words: Cd ion, DNA, Raman spectroscopy, Conformation

CHEN Xia, JIN Jian, YANG Wen-sheng, JIANG Lin, XU Li, LI Tie-jin. Interactions of Cd Ions with Salmon Sperm DNA[J]. Chemical Research in Chinese Universities, 2002, 18(4): 430-432.

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Interactions of Cd Ions with Salmon Sperm DNA

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