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Spectroscopic Investigation on the Toxic Interaction of Melamine with Herring Sperm DNA
被引:13
作者:
Sun, Yajing
[1
]
Liu, Rutao
[1
]
Chi, Zhenxing
[1
]
Qin, Pengfei
[1
]
Fang, Xiaoyan
[1
]
Mou, Yue
[1
]
机构:
[1] Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Peoples R China
关键词:
DNA;
Melamine;
Toxic Interaction;
BOVINE SERUM-ALBUMIN;
CALF THYMUS DNA;
FORMALDEHYDE RESINS;
FLUORESCENCE PROBE;
METHYLENE-BLUE;
MECHANISM;
COMPLEXES;
BINDING;
CANCER;
ACID;
D O I:
10.1002/jbt.20341
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
The toxic interaction of melamine with herring sperm DNA (hs-DNA) was investigated by using fluorescence and UV-vis absorption spectra techniques. The experimental results showed that the toxic interaction between melamine and hs-DNA occurred. Fluorescence quenching experiments indicated the existence of electrostatic binding between melamine and hs-DNA. The binding constants K-A and the binding site numbers were calculated by means of the Stern Volmer equation and were 9.8 x 10(4) L mol(-1) and 1.3, respectively. Both the results of fluorescence spectra and UV vis absorption spectra verified that there are electrostatic binding between melamine and hs-DNA. The possibility in the presence of a classical intercalation binding mode could be ruled out by using DNA unwinding experiments. (C) 2010 Wiley Periodicals, Inc. J Biochem Mol Toxicol 24:323-329, 2010; View this article online at wileyonlinelibrary.com. DOI 10:1002/jbt.20341
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页码:323 / 329
页数:7
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