单细胞绿藻斜生栅藻中生育酚生物合成的中间体。三种异构甲基植基苯醌的存在。
Intermediates of tocopherol biosynthesis in the unicellular alga Scenedesmus obliquus. The presence of three isomeric methylphytylbenzoquinones.
作者信息
Henry A, Powls R, Pennock J F
出版信息
Biochem J. 1987 Mar 1;242(2):367-73. doi: 10.1042/bj2420367.
Abstract
Three isomers of methylphytylbenzoquinone have been isolated from lipids of the unicellular alga Scenedesmus obliquus, the most abundant being 2-methyl-6-phytylbenzoquinone (65% of the total). The 2-methyl-3-phytyl and 2-methyl-5-phytyl isomers amounted to 8 and 27% respectively. Previously problems have been encountered in the separation of the 3-phytyl and the 6-phytyl isomers, but in the present study it was found that they separated readily as quinols. Phytyl plastoquinone was also found and the relevance of these compounds to the biosynthesis of alpha-tocopherol is discussed. As well as phylloquinone, a hydroxyphylloquinone was detected, and studies indicated that it is the 5' carbon atom to which the hydroxy group is attached. Such a compound has been found by workers using other unicellular algae.
摘要
从单细胞绿藻斜生栅藻的脂质中分离出了甲基植基苯醌的三种异构体，其中含量最高的是2-甲基-6-植基苯醌（占总量的65%）。2-甲基-3-植基异构体和2-甲基-5-植基异构体分别占8%和27%。以前在分离3-植基异构体和6-植基异构体时遇到过问题，但在本研究中发现，它们作为对苯二酚很容易分离。还发现了植基质体醌，并讨论了这些化合物与α-生育酚生物合成的相关性。除了叶绿醌外，还检测到一种羟基叶绿醌，研究表明羟基连接在5'碳原子上。使用其他单细胞藻类的研究人员也发现了这样一种化合物。
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