A simple method for the preparation of (5 Z ,8 Z ,11 Z ,14 Z )-16-Hydroxyeicosa-5,8,11,14-tetraenoic acid enantiomers and the corresponding 14,15-Dehydro analogues: role of the 16-Hydroxy group for the lipoxygenase reaction
作者:Igor V Ivanov、Stepan G Romanov、Nataliya V Groza、Santosh Nigam、Hartmut Kuhn、Galina I Myagkova
DOI:10.1016/s0968-0896(02)00024-x
日期:2002.7
was tested as lipoxygenase substrate, we found that it is well oxygenated by the soybean 15-lipoxygenase and by the recombinant human 5-lipoxygenase. Analysis of the reaction products suggested an arachidonic acid-like alignment at the active site of the two enzymes. In contrast, the product pattern of 16-HETE methyl ester oxygenation by the soybean lipoxygenase (5-lipoxygenation) may be explained
(5Z,8Z,11Z,13E)-15-羟基-5,8,11,13-二十碳四烯酸(15-HETE)不能被花生四烯酸15-脂氧合酶氧化,原因有两个:(i)它包含一个靠近其甲基末端的亲水性OH-基团;(ii)在C(13)处缺少双烯丙基亚甲基。我们合成了外消旋(5Z,8Z,11Z,14Z)-16-羟基-5,8,11,14-二十碳四烯酸(16-HETE),其中仍然含有双烯丙基C(13),分离出对映异构体,光学纯度为> 99%并测试它们作为5-和15-脂氧合酶的底物。我们的合成途径基于聚乙炔前体的立体定向加氢,除16-HETE外,还产生了大量(30%)14,15-dehydro-16-HETE。当测试16-HETE作为脂氧合酶底物时,我们发现大豆15-脂氧合酶和重组人5-脂氧合酶能很好地氧合。反应产物的分析表明在两种酶的活性位点上类似花生四烯酸的排列。相比之下,大豆脂氧合酶的16-HETE甲酯氧合的产物