An insight into DNA binding properties of newly designed cationic δ,δ′‑diazacarbazoles: Spectroscopy, AFM imaging and living cells staining studies
作者:Tao Jia、Zhi-Hang Chen、Peng Guo、Junping Yu
DOI:10.1016/j.saa.2018.12.013
日期:2019.3
indicated more compacted conformation of DNA in the presence of DPDPI than MPDPI, implying that DPDPI has a more significant effect on DNA conformations than MPDPI. Most interestingly, fluorescence enhancement of cationic δ,δ′‑diazacarbazoles occurred in the presence of DNA. With ionic strength increasing, the intercalative interactions between δ,δ′‑diazacarbazoles and DNA were weakened, but δ,δ′‑diazacarbazoles-DNA
两个阳离子δ,δ'-重氮咔唑,1-甲基-5 H-吡咯并[3,2- b:4,5- b ']碘化二吡啶鎓(MPDPI)和1,5-二甲基-5 H-吡咯并[3, 2‑ b:4,5‑ b ']碘化吡啶鎓(DPDPI),被设计和合成。通过各种光谱学方法表征DNA与两种δ,δ'-二氮杂咔唑之间的相互作用,观察到两种化合物与双链DNA之间的强相互作用,并探讨了相互作用类型和机理。UV-Vis和荧光数据表明,在两种化合物中的任何一种存在下,DNA都发生了巨大变化,这表明δ,δ'-二氮杂咔唑都可以与DNA紧密结合,并且高离子强度降低了插层相互作用。双链DNA中存在的紫外-可见和荧光DPDPI显示出比那些在存在更深刻的变化MPDPI,由于CH 3(在结构DPDPI)在5‑NH的位置取代H(在MPDPI的结构中)。和CT-DNA的圆二色性(CD)谱和原子力显微镜(AFM)的结果中的存在指示DNA的更压实构象DPD