Methods for measuring binding and cellular engagement of ligands with target proteins
申请人:EUROFINS DISCOVERX CORPORATION
公开号:US10641776B2
公开(公告)日:2020-05-05
Disclosed are methods for detecting and quantitatively measuring a binding property of a compound to a target macromolecule, wherein the target macromolecule is subject to denaturation and is linked to a labeling peptide, such as a short enzyme fragment. The method uses a fluid mixture comprising (i) a chimeric molecule comprising a target macromolecule linked to the labeling peptide, wherein the target macromolecule may be a chimeric protein expressed by and within an intact viable cell and (ii) a compound being measured for binding to the target macromolecule, wherein said target macromolecule is subject to denaturation. After allowing for binding of the compound (e.g. a small molecule inhibitor of the target macromolecule), one detects a signal from the labeling peptide, such as by enzyme fragment complementation. This signal indicates a differential between denatured and non-denatured target macromolecules and thereby indicates a differential between target macromolecules not bound to the compound and target macromolecules bound to the compound, respectively.
本发明公开了用于检测和定量测量化合物与目标大分子结合特性的方法,其中目标大分子可变性并与标记肽(如短酶片段)相连。该方法使用的流体混合物包括:(i) 嵌合分子,该嵌合分子包括与标记肽连接的目标大分子,其中目标大分子可以是由完整的有活力细胞表达并在其中的嵌合蛋白;(ii) 测量与目标大分子结合的化合物,其中所述目标大分子会变性。在允许化合物(如目标大分子的小分子抑制剂)结合后,通过酶片段互补等方法检测来自标记肽的信号。该信号表明变性和非变性靶大分子之间的差异,从而分别表明未与化合物结合的靶大分子和与化合物结合的靶大分子之间的差异。