文章基本信息

标题：Occurrence of squalene, di- and tetrahydrosqualenes, and vitamin MK8 in an extremely halophilic bacterium, Halobacterium cutirubrum
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作者：T. G. Tornabene ; M. Kates ; E. Gelpi 等
期刊名称：JLR Papers In Press
印刷版ISSN：0022-2275
电子版ISSN：1539-7262
出版年度：1969
卷号：10
期号：3
页码：294-303
语种：English
出版社：American Society for Biochemistry and Molecular Biology
摘要：The nonpolar (acetone-soluble) lipids of the extremely halophilic bacterium, Halobacterium cutirubrum , were found to consist of red carotenoid pigments (43%) and squalenes (48%) with a small amount of a vitamin K-type quinone. The squalenes were shown by n.m.r. and mass spectra to consist of the fully isoprenoid squalene (S; C₃₀H₅₀), dihydrosqualene (S₂; C₃₀H₅₂), and tetrahydrosqualene (S₄; C₃₀H₅₄) in the ratio of 1.0:0.4:0.1. S₂ probably has one reduced internal isoprenoid group, and S₄ has one internal and one terminal reduced isoprenyl group. The vitamin K-type quinone was shown by n.m.r. and mass spectra to have a C₄₀ isoprenoid side chain, and is thus identified as menaquinone-8 (MK-8).
关键词：menaquinone-8 ; halophilic bacteria