Recognition of solvent exposed protein surfaces using anthracene derived receptors
作者:Andrew J. Wilson、Jason Hong、Steven Fletcher、Andrew D. Hamilton
DOI:10.1039/b612975g
日期:——
A new class of receptor is described that can selectively bind to the solvent exposed surface of proteins such as cytochrome c and lysozyme with low micromolar affinity over cytochrome c551, α-lactalbumin, myoglobin and RNase A, under physiologically relevant conditions (5 mM phosphate, pH 7.4). The use of anthracene as a hydrophobic scaffold allows the receptor to act as a selective chemosensor via fluorescence quenching or FRET. The study reveals that co-operative electrostatic interactions over a large surface area dominate binding. Further investigations reveal that the receptor binds to the solvent exposed heme edge of cytochrome c inhibiting its reaction with small reducing agents and validating the strategy for the disruption of protein function.
本文描述了一类新型受体,在生理相关条件下(5 mM 磷酸盐,pH 7.4),它可以选择性地与细胞色素 c 和溶菌酶等蛋白质暴露在溶剂中的表面结合,与细胞色素 c551、α-乳白蛋白、肌红蛋白和 RNase A 相比,亲和力低至微摩尔。使用蒽作为疏水支架可使受体通过荧光淬灭或 FRET 发挥选择性化学传感器的作用。研究显示,大表面积上的合作静电相互作用在结合中占主导地位。进一步的研究发现,受体与细胞色素 c 暴露在溶剂中的血红素边缘结合,抑制了细胞色素 c 与小型还原剂的反应,验证了破坏蛋白质功能的策略。