Inhibition of dolichyl phosphate biosynthesis by compactin in cultured rat hepatocytes.
Isolated rat hepatocytes were cultured in monolayer for about 24 h. During this period the cells exhibited constant protein and lipid synthesis. When the culture medium contained compactin, a competitive inhibitor of the 3-hydroxyl-3-methylglutary-coenzyme-A reductase, dolichyl-P synthesis was inhibited by 91% at the end of the incubation, as estimated by the incorporation of [3H]acetate and by 77% as estimated by the incorporation of 32Pi. These results indicate that in primary cultures of rat hepatocytes dolichyl monophosphate is mainly synthesized through a de novo process, while phosphorylation through the CTP-mediated kinase is of limited functional importance.
D000085:Acetates / Q000378:metabolism; D019342:Acetic Acid; D000818:Animals; D002478:Cells, Cultured; D002784:Cholesterol / Q000096:biosynthesis; D003570:Cytidine Triphosphate / Q000502:physiology; D004288:Dolichol Phosphates / Q000096:biosynthesis*; D005990:Glycerol / Q000378:metabolism; D007930:Leucine / Q000378:metabolism; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D008148:Lovastatin / Q000031:analogs & derivatives*; D008297:Male; D009281:Naphthalenes / Q000494:pharmacology*; D010743:Phospholipids / Q000096:biosynthesis; D010761:Phosphorus Radioisotopes; D010766:Phosphorylation; D011106:Polyisoprenyl Phosphates / Q000096:biosynthesis*; D014176:Protein Biosynthesis; D051381:Rats; D014316:Tritium
D000085:Acetates; D004288:Dolichol Phosphates; D009281:Naphthalenes; D010743:Phospholipids; D010761:Phosphorus Radioisotopes; D011106:Polyisoprenyl Phosphates; D014316:Tritium; C028306:dolichol monophosphate; C012258:mevastatin; D003570:Cytidine Triphosphate; D002784:Cholesterol; D008148:Lovastatin; D007930:Leucine; D005990:Glycerol; D019342:Acetic Acid