dolichol-monophosphate-mannose has been researched along with undecaprenyl-phosphate* in 1 studies
1 other study(ies) available for dolichol-monophosphate-mannose and undecaprenyl-phosphate
Article | Year |
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Glycoprotein biosynthesis in Chlamydomonas. A mannolipid intermediate with the properties of a short-chain alpha-saturated polyprenyl monophosphate.
A crude membrane preparation of the unicellular green alga Chlamydomonas reinhardii was found to catalyse the incorporation of D-[14C]mannose from GDP-D-[14C]-mannose into a chloroform/methanol-soluble compound and into a trichloroacetic acid-insoluble polymer fraction. The labelled lipid revealed the chemical and chromatographic properties of a short-chain (about C55-C65) alpha-saturated polyprenyl mannosyl monophosphate. In the presence of detergent both long-chain (C85-C105) dolichol phosphate and alpha-unsaturated undecaprenyl phosphate (C55) were found to be effective as exogenous acceptors of D-mannose from GDP-D-[14C]mannose to yield their corresponding labelled polyprenyl mannosyl phosphates. Exogenous dolichyl phosphate stimulated the incorporation of mannose from GDP-D-[14C]mannose into the polymer fraction 5-7-fold, whereas the mannose moiety from undecaprenyl mannosyl phosphate was not further transferred. Authentic dolichyl phosphate [3H]mannose and partially purified mannolipid formed from GDP-[14C]mannose and exogenous dolichyl phosphate were found to function as direct mannosyl donors for the synthesis of labelled mannoproteins. These results clearly indicate the existence of dolichol-type glycolipids and their role as intermediates in transglycosylation reactions of this algal system. Both the saturation of the alpha-isoprene unit and the length of the polyprenyl chain may be regarded as evolutionary markers. Topics: Chlamydomonas; Chromatography, DEAE-Cellulose; Chromatography, Gel; Chromatography, Thin Layer; Dolichol Monophosphate Mannose; Dolichol Phosphates; Glycoproteins; Hydrolysis; Mannose; Membrane Glycoproteins; Polyisoprenyl Phosphate Sugars; Polyisoprenyl Phosphates | 1984 |