A fluorogenic assay for transketolase from Saccharomyces cerevisiae
摘要:
In order to generate transketolase (TK) with new or improved properties by in vitro evolution, an efficient screening system is an absolute prerequisite for identifying the evolved enzyme variants. We report here an assay allowing us to detect wild type TK activity in vitro by fluorescence. We examined the use of the fluorogenic compound I as donor substrate of TK, which is itself non fluorescent but releases a fluorescent product: umbelliferone. (C) 2003 Elsevier Science Ltd. All rights reserved.
For the screening of yeast transketolase (TK) variants with improved or new properties acquired by random mutagenesis, we report on the stereoselective synthesis of fluorogenic substrates as probes for measuring TK activity. Compound 1 (7-(2′,3′,5′-trihydroxy-4′-oxo-pentyl)oxycoumarine), prepared as previously described, [Tetrahedron Lett.2003, 44, 827–830] enabled us to evaluate wild type TK velocity
In order to generate transketolase (TK) with new or improved properties by in vitro evolution, an efficient screening system is an absolute prerequisite for identifying the evolved enzyme variants. We report here an assay allowing us to detect wild type TK activity in vitro by fluorescence. We examined the use of the fluorogenic compound I as donor substrate of TK, which is itself non fluorescent but releases a fluorescent product: umbelliferone. (C) 2003 Elsevier Science Ltd. All rights reserved.