کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2539052 | 1122163 | 2010 | 7 صفحه PDF | دانلود رایگان |
The inducing abilities of two alkaloids, Sanguinarine (San) and Nitidine (Nit), to fold human telomeric DNA d[5′-TTGGG(TTAGGG)3A-3′] (H24A) into G-quadruplex structures has been investigated by using CD and 1H NMR spectroscopy. It is found that, under salt-deficiency condition, San could induce H24A to fold into a normal anti-parallel G-quadruplex while Nit may induce hybrid or mixed-type G-quadruplex structures. In order to understand the structure of H24A induced by Nit, the interaction between Nit and existed hybrid G-quadruplex H24A in the presence of K+ has been examined for comparison. The different behaviors of these two molecules interacted with DNA could be ascribed to distinct binding mode, which may be resulted from the steric hindrance of the molecular frame of these two alkaloids.
Graphic abstractBy using CD and 1H NMR spectroscopy, it is found that, under salt-deficiency condition, San could induce H24A to fold into a normal anti-parallel G-quadruplex while Nit may induce hybrid or mixed-type.Figure optionsDownload as PowerPoint slide
Journal: Fitoterapia - Volume 81, Issue 8, December 2010, Pages 1026–1032