title: Catalase biosynthesis in yeast: formation of catalase A and catalase T during oxygen adaptation of Saccharomyces cerevisiae.
abstract: Catalase A from Saccharomyces cerevisiae and its biosynthetic precursors can specifically be immunoprecipitated from extracts obtained from yeast cells grown in the presence of L-[3H]leucine or 59FeCl3. The enzyme and its precursors recognized by a specific antiserum are absent from anaerobic cells. During oxygen adaptation of yeast pre-grown on 0.3% glucose under anaerobic conditions catalase A is formed via a heme-less precursor, probably the apomonomer of the protein, and a heme-containing intermediate. When cells are grown in the presence of Tween 80 the amount of catalase A, but not of catalase T, increases 4-fold. Comparison of the mode of synthesis of catalase T and A shows that no precursor-product relationship exists between the two proteins.
mesh_terms: D000222:Adaptation, Physiological; D002374:Catalase / Q000096:biosynthesis* / Q000276:immunology / Q000302:isolation & purification; D004792:Enzyme Precursors; D007700:Kinetics; D007930:Leucine / Q000378:metabolism; D010101:Oxygen Consumption; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D013997:Time Factors
chemical_list: D004792:Enzyme Precursors; D002374:Catalase; D007930:Leucine