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Appl Environ Microbiol. 2009 Feb;75(3):589-95. doi: 10.1128/AEM.00973-08. Epub 2008 Dec 5.

Production of glucaric acid from a synthetic pathway in recombinant Escherichia coli.

Author information

1
Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, USA.

Erratum in

  • Appl Environ Microbiol. 2009 Jul;75(13):4660.

Abstract

A synthetic pathway has been constructed for the production of glucuronic and glucaric acids from glucose in Escherichia coli. Coexpression of the genes encoding myo-inositol-1-phosphate synthase (Ino1) from Saccharomyces cerevisiae and myo-inositol oxygenase (MIOX) from mice led to production of glucuronic acid through the intermediate myo-inositol. Glucuronic acid concentrations up to 0.3 g/liter were measured in the culture broth. The activity of MIOX was rate limiting, resulting in the accumulation of both myo-inositol and glucuronic acid as final products, in approximately equal concentrations. Inclusion of a third enzyme, uronate dehydrogenase (Udh) from Pseudomonas syringae, facilitated the conversion of glucuronic acid to glucaric acid. The activity of this recombinant enzyme was more than 2 orders of magnitude higher than that of Ino1 and MIOX and increased overall flux through the pathway such that glucaric acid concentrations in excess of 1 g/liter were observed. This represents a novel microbial system for the biological production of glucaric acid, a "top value-added chemical" from biomass.

PMID:
19060162
PMCID:
PMC2632142
DOI:
10.1128/AEM.00973-08
[Indexed for MEDLINE]
Free PMC Article

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