title: Purification of 12-O-tetradecanoylphorbol-13-acetate-induced ornithine decarboxylase from mouse epidermis.
abstract: Ornithine decarboxylase was purified at least 1500-fold from mouse epidermis pretreated with five consecutive doses of 12-O-tetradecanoylphorbol-13-acetate and 3-isobutyl-1-methylxanthine at 3- to 4-day intervals. Following DEAE-cellulose chromatography and ammonium sulfate precipitation, ornithine decarboxylase was purified further by affinity chromatography. Ornithine decarboxylase was then radioactively labeled by covalently binding [3H]-alpha-difluromethylornithine to the enzyme following polyacrylamide gel electrophoresis under non-denaturing conditions. Following sodium dodecyl sulfate polyacrylamide gel electrophoresis and silver staining of protein, a band was identified that corresponded to a molecular weight of approx. 56,000, coincident with a peak of radioactivity. This is the first study to purify ornithine decarboxylase from mouse epidermis.
mesh_terms: D000818:Animals; D002262:Carboxy-Lyases / Q000302:isolation & purification*; D002846:Chromatography, Affinity; D004591:Electrophoresis, Polyacrylamide Gel; D004790:Enzyme Induction / Q000187:drug effects; D004817:Epidermis / Q000201:enzymology*; D005260:Female; D051379:Mice; D009955:Ornithine Decarboxylase / Q000302:isolation & purification*; D010704:Phorbols / Q000494:pharmacology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology*
chemical_list: D010704:Phorbols; D002262:Carboxy-Lyases; D009955:Ornithine Decarboxylase; D013755:Tetradecanoylphorbol Acetate