Identification of Schizosaccharomyces pombe prenol as dolichol-16,17

The identity of the prenol involved in N-linked glycosylation in the fission yeast Schizosaccharomyces pombe was unknown. In order to determine the identity of the prenol, S. pombe cells were incubated with a metabolic precursor of prenol, tritiated mevalonolactone. The cells incorporated only a mod...

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Bibliographic Details
Published in:Biochemical and biophysical research communications 1998-03, Vol.244 (2), p.546-550
Main Authors: Quellhorst, G.J. Jr, Piotrowski, J.S, Steffen, S.E, Krag, S.S
Format: Article
Language:English
Subjects:
Chromatography, High Pressure Liquid
Dolichol - chemistry
Dolichol - metabolism
Fatty Alcohols - chemistry
Fatty Alcohols - metabolism
Glycosylation
Molecular Structure
N-LINKED GLYCOSYLATION
Schizosaccharomyces - chemistry
Schizosaccharomyces - metabolism
SCHIZOSACCHAROMYCES POMBE
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Summary:The identity of the prenol involved in N-linked glycosylation in the fission yeast Schizosaccharomyces pombe was unknown. In order to determine the identity of the prenol, S. pombe cells were incubated with a metabolic precursor of prenol, tritiated mevalonolactone. The cells incorporated only a modest amount of label, about 1000 dpm per million cells, into base-stable lipid and only 1% of that radioactivity was incorporated into prenol. We found by normal phase silica HPLC and more directly by the lack of reactivity with MnO2 that the labeled lipid was predominantly dolichol, not polyprenol. Reverse phase HPLC demonstrated that in S. pombe dolichol ranged between 14 and 18 isoprene units with dolichol-16,17 being the most abundant prenol. This dolichol is of an intermediate length, between the dolichol of S. cerevisiae and that of mammalian cells.
ISSN:0006-291X
1090-2104
DOI:10.1006/bbrc.1998.8098