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Binding Characteristics and Protective Capacity of Cyanidin‐3‐Glucoside and its Aglycon to Calf Thymus DNA
Author(s) -
Zhang Chao,
Guo Xiaofei,
Cai Wenqian,
Ma Yue,
Zhao Xiaoyan
Publication year - 2015
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.12823
Subject(s) - bathochromic shift , chemistry , dna , hydrogen bond , anthocyanin , cyanidin , biochemistry , fluorescence , molecule , organic chemistry , food science , physics , quantum mechanics
The binding characteristics and protective capacity of cyanidin (Cy) and cyanidin‐3‐glucoside (C3G) to calf thymus DNA were explored for the first time. The Cy and C3G gave a bathochromic shift to the ultraviolet‐visible spectra of the DNA, indicating the formation of the DNA‐Cy and DNA‐C3G complexes. The complexes were formed by an intercalative binding mode based on the results of the fluorescence spectra and competitive binding analysis. Meanwhile, the Cy and C3G protected the DNA from the damage induced by the hydroxyl radical. The binding capacity and protective capacity of the C3G were stronger than that of the Cy. Furthermore, the formation of the DNA‐anthocyanin complexes was spontaneous when the hydrogen bond and hydrophobic force played a key role. Hence, the Cy and C3G could protect the DNA automatically from the damage induced by the hydroxyl radical.