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- W3193309417 abstract "Quercetin (Qu) and its metal complexes have received great attention during the last years, due to their good antioxidant, antibacterial, and anticancer activities. In this contribution, binding interactions of Qu and Qu-metal complexes with calf thymus DNA (ctDNA) were investigated and compared systematically by using spectroscopic techniques and viscosity measurement. UV-vis absorption spectra of ctDNA-compound systems showed obvious hypochromic effect. Relative viscosity and melting temperature of ctDNA increased after the addition of Qu and Qu-metal complexes, and the change tendency is Qu-Cr(III) > Qu-Mn(II) > Qu-Zn(II) > Qu-Cu(II) > Qu. Fluorescence competition experiments show that hydrogen bonds and van der Waals interaction play an important role in the intercalative binding of Qu and Qu-metal complexes with ctDNA. Qu and Qu-metal complexes could unwind the right-handed B-form helicity of ctDNA and further affect its base pair stacking. Space steric hindrance might be responsible for the differences in the intercalative binding between ctDNA and different Qu-metal complexes. These results provide new information for the molecular understanding of binding interactions of Qu-metal complexes with DNA and the strategy for research of structural influences." @default.
- W3193309417 created "2021-08-30" @default.
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- W3193309417 date "2021-08-25" @default.
- W3193309417 modified "2023-10-18" @default.
- W3193309417 title "Comparison on binding interactions of quercetin and its metal complexes with calf thymus <scp>DNA</scp> by spectroscopic techniques and viscosity measurement" @default.
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- W3193309417 doi "https://doi.org/10.1002/jmr.2933" @default.
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