Site-Specific Conversion of Cysteine Thiols into Thiocyanate Creates an IR Probe for Electric Fields in Proteins
作者:Aaron T. Fafarman、Lauren J. Webb、Jessica I. Chuang、Steven G. Boxer
DOI:10.1021/ja0650403
日期:2006.10.1
thiocyanate moiety is a nearly ideal probe for measuring the local electric field arising from the organized environment of the interior of a protein. Nitriles were introduced into three proteins: ribonuclease S (RNase S), human aldose reductase (hALR2), and the reaction center (RC) of Rhodobacter capsulatus, through a facile synthetic scheme for the transformation of cysteine residues into thiocyanatoalanine
硫氰酸酯部分的腈拉伸模式是测量蛋白质内部有组织环境产生的局部电场的近乎理想的探针。通过将半胱氨酸残基转化为硫氰酸基丙氨酸的简便合成方案,将腈引入三种蛋白质:核糖核酸酶 S (RNase S)、人醛糖还原酶 (hALR2) 和荚膜红杆菌的反应中心 (RC)。改性蛋白质的振动斯塔克效应光谱和傅里叶变换红外光谱表明,硫氰酸盐残基是探测蛋白质静电场的通用工具。