The regioselectivity of six serine proteases for the amino groups of lysine was investigated. α-Chymotrypsin showed a preference for the α-amino group, although the selectivity can be varied 10-fold depending on the reaction medium. Subtilisin Carlsberg and other bacterial proteases were highly specific for the ε-amino group, regardless of the reaction medium: they were used as catalysts for the preparative synthesis of isopeptides in anhydrous tert-amyl alcohol.
研究了六种
丝氨酸蛋白酶对赖
氨酸
氨基的区域选择性。α-胰
蛋白酶显示出对α-
氨基的偏好,尽管根据反应介质的不同,选择性可变化 10 倍。Subtilisin Carlsberg 和其他细菌
蛋白酶对ε-
氨基具有高度特异性,与反应介质无关:它们被用作催化剂,在无
水叔
戊醇中制备合成异肽。