Three bacteriorhodopsins with ring-didemethylated 6-<i>s</i>-locked chromophores and their properties
作者:M. Groesbeek、A. J. J. van Galen、J. H. Ippel、J. A. Berden、J. Lugtenburg
DOI:10.1002/recl.19931120401
日期:——
corresponding conjugated nitrile was accomplished using triethylsilane and trifluoroacetic acid. The three locked retinals interact with bacterioopsin to form bacteriorhodopsin with about the same rate as the native chromophore. This work proves that steric interaction of the 1,1-dimethyl group in the chromophore is an important factor in binding to bacterioopsin.
三个新颖的6- s锁紧刚性视网膜,外消旋全-E 1,5-二甲基-8,16-甲基视网膜,全-E 1,1-二甲基-8,18-甲基视网膜和全-E。在100mg规模上以高收率高产率地制备了8a,18-二氢-1、1-二甲基-8,18-甲基视黄醛。为了制备合成1,5-二甲基8,16-甲基视黄醛中的关键中间体,使用三乙基硅烷和三氟乙酸完成了不饱和氰醇到相应的共轭腈的还原氰化反应。三个锁定的视网膜与细菌视紫红质相互作用形成细菌视紫红质,其速率与天然发色团的速率大致相同。这项工作证明了生色团中的1,1-二甲基的空间相互作用是结合细菌素的重要因素。