Pyruvate aldolases in chiral carbon-carbon bond formation.

Journal Article

A procedure for the preparation of optically pure alpha-keto-gamma-hydroxy carboxylic acids through stereospecific aldol addition catalyzed by pyruvate aldolases from the Entner-Doudoroff and the DeLey-Doudoroff glycolytic pathways is described. This highly versatile fragment serves as a precursor for a variety of commonly encountered functionalities, including beta-hydroxy aldehydes and carboxylic acids, alpha-amino-gamma-hydroxy carboxylic acids and alpha,gamma-dihydroxy carboxylic acids. The protocol described here uses recombinant His6-tagged KDPG aldolase for the synthesis of (S)-4-hydroxy-2-keto-4-(2'-pyridyl)butyrate. A protocol for evaluating enantiomeric excess through formation of the gamma-lactone of the dithioacetal followed by chiral-phase gas-liquid chromatography is also described. Enzyme expression and enzymatic synthesis can be accomplished in approximately 1 week. The enzymatic aldol addition proceeds in nearly quantitative yields with enantiomeric excesses greater than 99.7%.

Full Text

Duke Authors

Cited Authors

  • Walters, MJ; Toone, EJ

Published Date

  • 2007

Published In

Volume / Issue

  • 2 / 7

Start / End Page

  • 1825 - 1830

PubMed ID

  • 17641651

Electronic International Standard Serial Number (EISSN)

  • 1750-2799

Digital Object Identifier (DOI)

  • 10.1038/nprot.2007.260

Language

  • eng

Conference Location

  • England