title: Production and purification of a Staphylococcus epidermidis bacteriocin.
abstract: Liquid cultures of Staphylococcus epidermidis 1580 contained rather small amounts of a bacteriocin, staphylococcin 1580, which was found both in the supernatant fluid and in the cell pellet. It could be extracted from the cells with 5% NaCl solution. The staphylococcin production could not be induced by ultraviolet irradiation or treatment with mitomycin C. Bacteria grown on semisolid medium produced a much larger amount of the compound with a high specific activity. The staphylococcin was purified by ammonium sulfate precipitation, ultracentrifugation, and chromatography on Sephadex columns. The purified material was homogeneous on polyacrylamide gel electrophoresis. The molecular weight was between 150,000 and 400,000. The bacteriocin was composed of protein, carbohydrate, and lipid and consisted of subunits exhibiting a molecular weight of about 20,000.
mesh_terms: D000645:Ammonium Sulfate; D001426:Bacterial Proteins / Q000032:analysis; D001430:Bacteriocins / Q000032:analysis / Q000302:isolation & purification; D002241:Carbohydrates / Q000032:analysis; D011232:Chemical Precipitation; D002850:Chromatography, Gel; D003470:Culture Media; D004591:Electrophoresis, Polyacrylamide Gel; D006863:Hydrogen-Ion Concentration; D008055:Lipids / Q000032:analysis; D008937:Mitomycins / Q000494:pharmacology; D008970:Molecular Weight; D011830:Radiation Effects; D013210:Staphylococcus / Q000032:analysis / Q000187:drug effects / Q000254:growth & development / Q000528:radiation effects; D013696:Temperature; D014461:Ultracentrifugation; D014466:Ultraviolet Rays
chemical_list: D001426:Bacterial Proteins; D001430:Bacteriocins; D002241:Carbohydrates; D003470:Culture Media; D008055:Lipids; D008937:Mitomycins; D000645:Ammonium Sulfate