Efficient synthesis of 11-Z-retinals labeled with 2H at the C5, C9, or C13 methyl groups is described. The 2H-labeled retinals were used to regenerate the visual pigment rhodopsin for structural investigations. Solid-state 2H NMR data provided the orientation of retinal within the rhodopsin binding pocket as well as its conformation. Extension of the approach to other membrane receptors can yield knowledge of their mechanisms of activation as a guide for ligand-based drug design.
描述了一种高效合成标记有2H的11-Z-
视黄醛的方法,这些标记位于C5、C9或C13的甲基上。标记为2H的
视黄醛被用于再生视觉色素视紫红质,以进行结构研究。固态2H NMR数据提供了
视黄醛在视紫红质结合口袋内的取向以及其构象。将该方法扩展到其他膜受体可以获得它们的激活机制的知识,为基于
配体的药物设计提供指导。