Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
24377 | Journal of Biotechnology | 2010 | 8 Pages |
Abstract
5-O-Coumarinyl-d-xylulose was studied as a fluorogenic substrate for the stereospecific assay of transketolase enzyme. Enzymatic C2–C3 cleavage released an α-hydroxyl, β-coumarinyl substituted aldehyde. Although the subsequent β-elimination step was rate limiting under chemical or enzymatic catalysis, we detected a TK activity as low as 0.7 mIU. To improve the fluorescence signal release, kinetic and product distribution analyses of this reaction were performed by LC/UV/MS coupling.
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Authors
F. Charmantray, B. Légeret, V. Hélaine, L. Hecquet,