Methods, reagents, compositions, and kits for in situ interaction determination (ISID) via interaction-dependent polymerase chain reaction (ID-PCR) are provided herein. ISID technology is useful for rapidly evaluating potential small molecule-target interactions from mixtures in a single solution. ISID is compatible with unpurified targets in biological samples and can be used to evaluate ligand-binding in DNA-encoded chemical libraries in cell lysates. ISID is also useful to screen ligand interactions of proteins or other molecules in their native state, including their native post-translational modifications and any interactions with accessory proteins and metabolites, in ways that better reflect their relevant biological environment. Because ISID is compatible with crude cell lysates, difficult-to-purify, poorly soluble, intrinsically unstable, and aggregation-prone targets may also be compatible with this method, without requiring truncation or other strategies used to promote heterologous expression.
本文提供了用于通过依赖于相互作用的聚合酶链反应(ID-PCR)的原位相互作用确定(ISID)的方法、试剂、组成物和试剂盒。 ISID技术可用于快速评估单个溶液中来自混合物的潜在小分子-靶标相互作用。 ISID兼容
生物样品中未纯化的靶标,并可用于评估细胞裂解物中DNA编码
化学文库中的
配体结合。 ISID还可用于筛选蛋白质或其他分子在其天然状态下的
配体相互作用,包括其天然后翻译修饰以及与辅助蛋白质和代谢物的任何相互作用,这些方法更好地反映了它们的相关
生物环境。由于ISID与粗细胞裂解物兼容,因此难以纯化、溶解度差、本质上不稳定和易于聚集的靶标也可能与该方法兼容,而无需使用截断或其他促进异源表达的策略。