Evaluation of Isoprenoid Conformation in Solution and in the Active Site of Protein-Farnesyl Transferase Using Carbon-13 Labeling in Conjunction with Solution- and Solid-State NMR
作者:Todd J. Zahn、Markus Eilers、Zhengmao Guo、Mohamad B. Ksebati、Matthew Simon、Jeffrey D. Scholten、Steven O. Smith、Richard A. Gibbs
DOI:10.1021/ja000860f
日期:2000.8.1
knowledge of the solution conformation of FPP, as well as its conformation in the active site of FTase. Four bis-13C-labeled derivatives of farnesol and geranylgeraniol have been synthesized and used to prepare the corresponding FPP and GGPP derivatives. The labeled farnesyl and geranylgeranyl derivatives 2−7 were utilized in conjunction with solution 13C NMR to probe the conformation of the prenyl chain
酶蛋白法呢基转移酶 (FTase) 使用法呢基二磷酸 (FPP) 作为异戊二烯来源,催化 Ras 蛋白和其他关键信号转导蛋白的法呢基化。因此,FTase 抑制剂作为潜在的新型抗癌剂引起了人们的极大兴趣。此类试剂的设计将通过对 FPP 溶液构象及其在 FTase 活性位点中的构象的详细了解来提供信息。已经合成了四种双 13C 标记的法呢醇和香叶基香叶醇衍生物,并用于制备相应的 FPP 和 GGPP 衍生物。标记的法呢基和香叶基香叶基衍生物 2-7 与溶液 13C NMR 结合使用,以探测各种不同溶剂中异戊二烯链的构象。这些研究,连同分子动力学模拟,证明异戊二烯链主要以扩展构象存在。令人惊讶的是,这种对扩展构象的偏好对溶剂不敏感。没有明显的...