title: Purification and characterization of proteinase yscJ, a new yeast peptidase.
abstract: A newly recognized peptidase, designated proteinase yscJ, was purified from the yeast Saccharomyces cerevisiae. The enzyme is of non-vacuolar origin and cleaves the Tyr-Lys bond of the synthetic peptide substrate Cbz-Tyr-Lys-Arg-NH-Ph (Cbz, benzyloxycarbonyl; NH-Ph, 4-nitroanilide) and the Glu-Lys bond of the substrate Boc-Glu-Lys-Lys-NH-Mec (Boc, butoxycarbonyl; Mec, 4-methylcoumarinyl) with high efficiency. Optimum pH for cleavage of Cbz-Tyr-Lys-Arg-NH-Ph is in the range 7.0-7.5. The purified enzyme has a molecular mass of approximately 58 kDa, as judged by gel filtration on a Superose 12 FPLC column. Mercury compounds and EDTA were found to be potent inhibitors of proteinase yscJ activity.
authors.affiliation: Institut für Biochemie, Universität Stuttgart, Federal Republic of Germany.
authors.forename: J C
authors.initials: JC
authors.lastname: Wagner
authors.forename: D H
authors.initials: DH
authors.lastname: Wolf
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D002850:Chromatography, Gel; D010450:Endopeptidases / Q000302:isolation & purification* / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008666:Metalloendopeptidases / Q000302:isolation & purification* / Q000378:metabolism; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009842:Oligopeptides / Q000378:metabolism; D011480:Protease Inhibitors / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D013379:Substrate Specificity
chemical_list: D000596:Amino Acids; D009842:Oligopeptides; D011480:Protease Inhibitors; C072745:butoxycarbonylglutamyl-lysyl-lysine-4-methylcoumarinyl-7-amide; C072747:benzyloxycarbonyltyrosyl-lysyl-arginine-4-nitroanilide; D010450:Endopeptidases; D008666:Metalloendopeptidases; C072744:yscJ proteinase