title: Engineering of substrate mimetics as novel-type substrates for glutamic acid-specific endopeptidases: design, synthesis, and application.
abstract: This account reports on the development and function of novel substrate mimetics as artificial substrates for Glu-specific endopeptidases. Firstly, in an empirical way, various aliphatic and aromatic analogs of the already established carboxymethyl thioester-substrate mimetics were designed from simple structure-function relationship studies. The specificity of the newly developed substrates for Staphylococcus aureus V8 protease-catalyzed reactions have been examined by steady-state hydrolysis kinetic studies. Additionally, these studies were expanded to the use of the equally Glu-specific endopeptidase from Bacillus licheniformis (BL-GSE) which can easily be purified from alcalase in high yields. Finally, the novel substrate mimetics were used as acyl donor components in BL-GSE- and V8 protease-catalyzed model acyl transfer reactions. The results clarify the newly developed substrate mimetics as efficient acyl donors as well as BL-GSE as an attractive alternative to V8 protease for enzymatic peptide synthesis.
authors.affiliation: Department of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Germany.
authors.forename: N
authors.initials: N
authors.lastname: Wehofsky
authors.forename: J
authors.initials: J
authors.lastname: Wissmann
authors.forename: M
authors.initials: M
authors.lastname: Alisch
authors.forename: F
authors.initials: F
authors.lastname: Bordusa
mesh_terms: D002384:Catalysis; D007700:Kinetics; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018716:Molecular Mimicry; D010455:Peptides / Q000138:chemical synthesis* / Q000737:chemistry / Q000378:metabolism; D012697:Serine Endopeptidases / Q000378:metabolism*; D013379:Substrate Specificity
chemical_list: D010455:Peptides; D012697:Serine Endopeptidases; C028344:glutamyl endopeptidase