Disclosed are methods of single-site-specific cysteine modification on peptide/protein molecules under physiologically relevant conditions. This process features several significant advantages over existing methods of peptide modification, such as specificity towards thiols over other nucleophiles (e.g., amines, hydroxyls), excellent functional group tolerance, and mild reaction conditions. Especially important is the specificity observed for thiols appearing in an X-Cys-Pro-X sequence over other thiols or disulfides, where X is Phe, Trp, or Tyr; under the inventive conditions, other cysteines or reactive functional groups on the same peptide/protein chain are not functionalized.
披露了在生理条件下对肽/蛋白分子进行单位点特异性半胱
氨酸修饰的方法。该过程具有几个显著优点,相比现有的肽修饰方法,如对
硫醇具有特异性而不影响其他亲核试剂(如胺基、羟基)、良好的官能团容忍性和温和的反应条件。尤其重要的是,观察到对出现在X-Cys-Pro-X序列中的
硫醇的特异性,而不影响其他
硫醇或二
硫键,其中X为Phe、Trp或Tyr;在创新的条件下,同一肽/蛋白链上的其他半胱
氨酸或反应性官能团不会发生功能化。