Methods are provided for detecting methionine aminopeptidase (MAP) activity and for detecting inhibitors of MAP. The methods utilize a peptide comprising an N-terminal methionine which can be cleaved from the peptide by MAP, and a C-terminal detection moiety which is released by a second peptidase only if the N-terminal methionine has been cleaved from the peptide. When the peptide is combined with MAP and the second peptidase, the detection moiety is released, while the addition of a MAP inhibitor will inhibit the release of the detection moiety. Reaction mixes, peptides, and kits which are useful for practicing the methods are also provided.
提供了检测蛋
氨酸
氨肽酶(
MAP)活性和检测
MAP 抑制剂的方法。这些方法利用了一种
多肽,该
多肽包含一个 N 端蛋
氨酸和一个 C 端检测分子,前者可被
MAP 从
多肽中裂解,后者只有在 N 端蛋
氨酸从
多肽中裂解后才会被第
二肽酶释放。当肽与
MAP 和第
二肽酶结合时,检测分子被释放,而添加
MAP 抑制剂将抑制检测分子的释放。此外,还提供了有助于实施上述方法的反应混合物、
多肽和试剂盒。