24-METHYLENE-25-METHYLCHOLESTEROL AND BOTH C-24 EPIMERS OF 24-ETHYL-22-DEHYDROCHOLESTEROL IN A FRESH-WATER GREEN-ALGA HYDRODICTYON-RETICULATUM

被引：8

作者：

AKIHISA, T ^{[1
]}

KOJIMA, S ^{[1
]}

YOKOTA, T ^{[1
]}

TAMURA, T ^{[1
]}

机构：

[1] TEIKYO UNIV,SCH SCI & ENGN,DEPT BIOSCI,UTSUNOMIYA 320,JAPAN

来源：

PHYTOCHEMISTRY | 1991年 / 30卷 / 11期

关键词：

HYDRODICTYON-RETICULATUM; CHLOROPHYCEAE; GREEN ALGA; STEROLS; 24-METHYLENE-25-METHYLCHOLESTEROL; STIGMASTEROL; PORIFERASTEROL;

D O I：

10.1016/0031-9422(91)80079-G

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A freshwater green alga Hydrodictyon reticulatum contained cholesterol and 24-ethylcholesterol as the dominant sterols. 24-Methylcholesterol, 24-methyl-22-dehydrocholesterol, 24-ethyl-22-dehydrocholesterol and 24-methylene-25-methylcholesterol were identified among the other sterols. The 400 MHz H-1 NMR spectroscopy has shown that 24-methylcholesterol and 24-ethyl-22-dehydrocholesterol were mixtures of the C-24 epimers with the 24-alpha-epimers predominating, whereas 24-ethylcholesterol and 24-methyl-22-dehydrocholesterol consisted only of the 24-alpha-epimers. This appears to be the first instance of the detection of a sterol possessing a quaternary carbon in the side chain (24-methylene-25-methylcholesterol) and the first demonstration of the occurrence of both C-24 epimers of a 24-ethylsterol(stigmasterol and poriferasterol) in a species from the phylum Chlorophyta.

引用

页码：3621 / 3624

页数：4

共 24 条

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