A Novel Class of Zinc-Binding Inhibitors for the Phosphatidylcholine-Preferring Phospholipase C from <i>Bacillus</i> <i>c</i><i>ereus</i>
作者:Stephen F. Martin、Bruce C. Follows、Paul J. Hergenrother、Christopher L. Franklin
DOI:10.1021/jo9915731
日期:2000.7.1
transduction cascades in mammalian systems, there has been considerable interest in the development of inhibitors of these enzymes. Toward this end, we have discovered that the cyclic N,N'-dihydroxyureas 6-10 inhibit the phosphatidylcholine preferring PLC from Bacillus cereus (PLCBc). This class of inhibitors is believed to function by the bidentate chelation of the N,N'-dihydroxyurea array to one or more
磷脂酶C(PLC)同工酶催化磷脂水解,提供二酰基甘油(DAG)和磷酸化的头基。由于DAG已经牵涉到哺乳动物系统中的细胞信号转导级联反应中,因此人们对开发这些酶的抑制剂产生了极大的兴趣。为此,我们已经发现环状N,N′-二羟基脲6-10抑制了蜡状芽胞杆菌(PLCBc)中优选PLC的磷脂酰胆碱。据信这类抑制剂通过N,N′-二羟基脲阵列与酶的活性位点上的一个或多个锌离子的二齿螯合起作用。由于这些化合物的亲和力与N-OH羟基的pKaS相关,显然,为了使锌离子有效配位,必须将一个或两个羟基离子化。同样显然,对于这些抑制剂可能存在相当严格的空间要求。