The invention provides eukaryotic cell-based screening methods to identify an aptamer that specifically binds a ligand, or a ligand that specifically binds an aptamer, using a polynucleotide cassette for the regulation of the expression of a reporter gene where the polynucleotide cassette contains a riboswitch in the context of a 5′ intron-alternative exon-3′ intron. The riboswitch comprises an effector region and an aptamer such that when the aptamer binds a ligand, reporter gene expression occurs.
本发明提供了基于真核细胞的筛选方法,利用多核苷酸盒鉴定特异性结合
配体的适
配体,或特异性结合适
配体的
配体,以调控报告
基因的表达,其中多核苷酸盒在5′内含子-替代外显子-3′内含子的上下文中含有
核糖开关。
核糖开关包括效应区和适
配体,当适
配体与
配体结合时,报告
基因就会表达。