The interactions of bis-phenanthridinium–nucleobase conjugates with nucleotides: adenine-conjugate recognizes UMP in aqueous medium
作者:Lidija-Marija Tumir、Marina Grabar、Sanja Tomić、Ivo Piantanida
DOI:10.1016/j.tet.2010.01.063
日期:2010.3
Among series of novel bis-phenanthridinium–nucleobase conjugates, the adenine derivative revealed high (log Ks=6.9 M−1) and selective affinity toward complementary nucleotide (UMP), accompanied by specific change in the UV–vis spectrum of phenanthridine subunits, differing significantly from changes caused by addition of other nucleotides. High stability and selectivity of adenine-conjugate/UMP non-covalent
在一系列新颖的双菲啶-核碱基缀合物中,腺嘌呤衍生物显示出较高的(log K s = 6.9 M -1)和对互补核苷酸(UMP)的选择性亲和力,并伴随着菲啶亚基的UV-vis光谱发生特定变化,与添加其他核苷酸引起的变化显着不同。根据分子模型研究,腺嘌呤-共轭物/ UMP非共价复合物的高稳定性和选择性与菲啶鎓亚基,共价连接的腺嘌呤和添加的UMP之间分子间和分子内芳族堆积相互作用的数量有关,而关于UMP的关于其他核苷酸的腺嘌呤-缀合物最可能是UMP和腺嘌呤之间额外氢键合的结果。