Glutathione analogues as substrates or inhibitors that discriminate between allozymes of the MDR-involved human glutathione transferase P1-1
作者:Aikaterini Zompra、Nikolaos Georgakis、Eleni Pappa、Trias Thireou、Elias Eliopoulos、Nikolaos Labrou、Paul Cordopatis、Yannis Clonis
DOI:10.1002/bip.22844
日期:2016.5
hydrophobic/hydrophilic amide substituent at position 2 (Cys) favors inhibition of B and C. Heterocyclic substituents at position 1, only, produce catalytic analogues for A, whereas less bulky and more flexible hydrophobic/hydrophilic substituents, at positions 1 or 3, lead to effective substrates with C. When such substituents were introduced simultaneously at positions 1 and 3, the analogues produced have no
谷胱甘肽(GSH)结构指导的三肽类似物是通过固相技术设计和合成的,通过RP和/或GF柱色谱法纯化(≥95%),以鉴定与GSH相比具有相似或更高结合和催化效率的那些涉及MDR参与的人类GSTP1-1同工酶,并可以区分多态性人类GSTP1基因位点的同基因表达产物,分别称为hGSTP1 * A(Ile 104 / Ala 113),hGSTP1 * B(Val 104 / Ala 113)和hGSTP1 * C(Val 104 / Val 113)。类似物具有单个氨基酸改变以及不止一个位置的改变。一些类似物表现出显着的同工酶选择性,催化结合到A(I,II,IV,XII),C(V和XVI),A和C(III,VII,XIV)或所有三个同工酶(XV)。)。GSH第1或2位的杂环取代基有利于抑制A,而第2位(Cys)的较小疏水/亲水酰胺取代基有利于抑制B和C。仅在1位的杂环取代基可生成A的催化类似物,相