(1R)- and (1S)-5-demethyl-8,16-methanobacteriorhodopsin and its properties. The synthesis and spectroscopy of 5-demethyl-8,16-methanoretinal in optically active and isotopic forms
作者:M. B. Spijker-Assink、G. W. Robijn、J. H. Ippel、J. Lugtenburg、B. H. Groen、K. van Dam
DOI:10.1002/recl.19921110104
日期:——
16-methanoretinal was prepared in both optical antipodes (1R and 1S), as well as in their 9-Z and 13-Z forms. The interaction of the 1R and 1S forms with bacterioopsin shows that there is a clear chiral recognition on the formation of the bacteriorhodopsin analogues, reflected in the rate of binding and ϵmax values. The two bacteriorhodopsins with optically active chromophores have an identical λmax value
(ALL- ë)-5-去甲基-8,16-二methanoretinal在两个旋光对映体(1制备- [R 1个小号),以及在它们的9- Ž和13-Z形式。1 R和1 S形式与细菌视紫红质的相互作用表明,在细菌视紫红质类似物的形成上有明确的手性识别,反映在结合速率和ϵ max值上。具有光学活性发色团的两种细菌视紫红质具有相同的λmax值并显示出与光子驱动质子泵相同的效率。5-甲基的不存在导致质子泵效率比天然系统低50%。另外,对于外消旋的5-去甲基-8,16-二methanoretinal,5- 2 H,7- 2 H,5,7- 2 ħ 2和5,7,16a,16A- 2 ħ 4个同位素中的各种异构形式清一色E,9-Z和13- ż还制备。