New potent inhibitors of tyrosinase: Novel clues to binding of 1,3,4-thiadiazole-2(3H)-thiones, 1,3,4-oxadiazole-2(3H)-thiones, 4-amino-1,2,4-triazole-5(4H)-thiones, and substituted hydrazides to the dicopper active site
作者:Usman Ghani、Nisar Ullah
DOI:10.1016/j.bmc.2010.04.021
日期:2010.6.1
hydrazides were tailored and synthesized as new potent inhibitors of tyrosinase. The rationale for inhibitor design was based on the active site structural evidence from the crystal structures of bacterial tyrosinase and potato catechol oxidase enzymes. Kinetic and active site binding studies suggested mono-dentate binding of thiadiazole, oxadiazole, and triazole rings to the active site dicopper center
一系列1,3,4-噻二唑-2(3 H)-硫酮,1,3,4-恶二唑-2(3 H)-硫酮,4-氨基-1,2,4-三唑-5(4)H)-硫酮和取代的酰肼被定制并合成为酪氨酸酶的新型有效抑制剂。设计抑制剂的基本原理是基于细菌酪氨酸酶和马铃薯儿茶酚氧化酶的晶体结构的活性位点结构证据。动力学和活性位点结合研究表明,噻二唑,恶二唑和三唑环与酪氨酸酶活性位点双铜中心的单齿结合包括疏水性,有助于有效抑制。动力学图显示了所有25种化合物的混合抑制类型。发现在对酪氨酸酶的高结合亲和力中,三唑环的C3取代和噻二唑/恶二唑环的C5取代起主要作用。