Identification of the sulfolipids in the non-photosynthetic diatom nitzschia alba

R. Anderson, M. Kates, B. E. Volcani

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Abstract

The four major sulfolipids in the non-photosynthetic marine diatom, Nitzschia alba, were isolated in pure form and their structures were established spectrometrically and by identification of their hydrolysis products as (a) 24-methylene cholesterol sulfate, (b) 1-deoxyceramide-1-sulfonate, (c) phosphatidyl sulfocholine (a sulfonium analogue of phosphatidylcholine) and (d) sulfoquinovosyi diglyceride. The major characteristic fatty acids of the sulfolipids were: for the deoxyceramide sulfonate, 16:0 (26%) and 16:1-Δ3-trans (64%); for the sulfonium analogue, 14:0 (30%), 18:1 (12%), 18:2 (8%), 20:5 (27%) and 22:6 (4%); and for the sulfoquinovosyl diglyceride (two species, respectively), 14:0 (9%, 22%), 16:0 (16%, 28%), 18:1 (8%, 22%), 20:5 (42%, 23%) and 22:6 (14%, 2%). Traces of lyso-derivatives of sulfoquinovosyl diglyceride and phosphatidyl sulfocholine were also detected. The deoxyceramide sulfonate and the phosphatidyl sulfocholine represent novel membrane lipid components not previously detected in other organisms. They may however have a widespread distribution in marine diatoms and perhaps in marine organisms generally.

Original languageEnglish
Pages (from-to)89-106
Number of pages18
JournalBiochimica et Biophysica Acta - Molecular and Cell Biology of Lipids
Volume528
Issue number1
DOIs
Publication statusPublished - Jan 27 1978
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by grants from NRC of Canada (A-5324) and from NIH (GM-08229-13-14). The authors are indebted to Drs. Gordon W. Wood and Pui-Yan Lau for the field desorption mass spectra, to Dr. Ian P. Smith for the 13CN MR spectra and to Mr. Hector Seguin for the microanalyses.

ASJC Scopus Subject Areas

  • Biophysics
  • Biochemistry
  • Endocrinology

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