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 MnO 2 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.
Biochemical and Biophysical Research Communications – Elsevier
Published: Mar 17, 1998
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