We describe the identification of small-molecule G-quadruplex ligands using a direct ELISA screen of a one-bead-one-compound library of unnatural polyamides displayed on a branched linker with a biotin tag. This general purpose parallel screen for small molecule–oligonucleotide interactions was validated by surface plasmon resonance and ELISA of resynthesized compounds. Linear polyamides displayed similar rankings in their affinity for quadruplex as their branched counterparts. Quadruplex affinity as judged by these surface based techniques was a useful predictor of the ability of the ligands to stabilize the quadruplex to thermal unfolding in solution.
我们描述了使用直接ELI
SA筛选小分子G-四联体
配体的方法,该方法使用一个带有
生物素标签的支链连接子,将非天然
多肽化合物库显示在一个珠子上。这种用于小分子-寡核苷酸相互作用的通用平行筛选方法已通过表面等离子共振和重新合成化合物的ELI
SA验证。线性
多肽化合物对四联体的亲和力与其支链对应物相似。通过这些基于表面技术的判断,四联体的亲和力可以预测
配体稳定四联体在溶液中热解的能力。