THE LOCATION OF DOUBLE-BONDS IN A CEREBROSIDE FROM EDIBLE FUNGI (MUSHROOM) ESTIMATED BY B/E LINKED SCAN FAST-ATOM-BOMBARDMENT MASS-SPECTROMETRY

被引:21
作者
SAWABE, A
MORITA, M
OKAMOTO, T
OUCHI, S
机构
[1] KINKI UNIV,JOINT RES CTR,OSAKA,OSAKA 577,JAPAN
[2] KINKI UNIV,FAC AGR,DEPT AGR CHEM,NARA 631,JAPAN
[3] KINKI UNIV,FAC AGR,DEPT AGRON,NARA 631,JAPAN
关键词
D O I
10.1002/bms.1200231103
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
The structure of a cerebroside isolated from Hypsizigus marmoueus (mushroom, Bunashirneji) was determined to be (4E, 8E)-N-2-hydroxyhexadecanoyl-1-O-beta-glucopyranosyl-9-methyl-C-18-sphinga-4,8,-diene (1) by positive and negative ion mode fast atom bombardment (FAB) mass spectrometry using the B/E constant linked scan method. In particular, the location of the double bonds in the long-chain base was determined by the method. The structure of cerebrosides having the long-chain base of 9-methyl-C-18-sphinga-4,8-dienine could be determined in general by the presence of characteristic fragment ions of [C-19-sphingadienine + H - H2O](+) at m/z 276 and [C-19-sphingadienine + H](+) at m/z 294, and the fatty acid carbon number could be calculated from the characteristic fragment ion of [ceramide - 180]+ ([MH - GlcOH - 180]+) in positive ion mode FAB mass spectrometry. Compound 1 was isolated for the first time from Hypsizigus marmoreus in the present study.
引用
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页码:660 / 664
页数:5
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