Phosphate-perylene modified G-quadruplex probes for the detection of Pb<sup>2+</sup> using fluorescence anisotropy
作者:Zhixuan Wang、Xiaojing Pei、Na Li、Xinjing Tang
DOI:10.1039/c6tb00539j
日期:——
G-quadruplex structures. Two probes (G4-9 and TBA-9) were successfully used in Pb2+ detection through fluorescence anisotropy. Once the complexes of Pb2+ with G4-9 or TBA-9 were formed, the rotational diffusion of the perylene moiety was limited, resulting in a significant increase in fluorescence anisotropy. Both probes showed good sensitivity to Pb2+ and their fluorescence anisotropy signals demonstrated
一种简单而通用的磷酸二per修饰策略被用于开发具有凝血酶结合适体(TBA)和[d(TGGGT)4](G4)序列的G-四链体探针。将ylene部分插入寡核苷酸的不同磷酸位置,而对G-四链体结构没有显着影响。与K +或Pb2 +结合后,这些探针由于标记位置和G-四链体结构的不同而显示出不同的per荧光各向异性响应。通过荧光各向异性成功地将两种探针(G4-9和TBA-9)用于Pb2 +检测。一旦形成Pb2 +与G4-9或TBA-9的复合物,,部分的旋转扩散就受到限制,导致荧光各向异性显着增加。