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Production of 1,3-propanediol From Glycerol by Recombinant E. Coli Using Incompatible Plasmids System

Production of 1,3-propanediol From Glycerol by Recombinant E. Coli Using Incompatible Plasmids System

Fenghuan Wang, Huijin Qu, Dawei Zhang, Pingfang Tian, Tianwei Tan

Mol Biotechnol. 2007 Oct;37(2):112-9.

PMID: 17914171

Abstract:

1,3-Propanediol (1,3-PD) has numerous applications in polymers, cosmetics, foods, lubricants, and medicines as a bifunctional organic compound. The genes for the production of 1,3-PD in Klebsiella pneumoniae, dhaB, which encodes glycerol dehydratase, and dhaT, which encodes 1,3-PD oxidoreductase, and gdrAB, which encodes glycerol dehydratase reactivating factor, are naturally under the control of different promoters and are transcribed in different directions. These genes were coexpressed in E. coli using two incompatible plasmids (pET28a and pET22b) in the presence of selective pressure. The recombinant E. coli coexpressed the glycerol dehydratase, 1,3-propanediol oxidoreductase and reactivating factor for the glycerol dehydratase at high levels. In a fed-batch fermentation of glycerol and glucose, the recombinant E. coli containing these two incompatible plasmids consumed 14.3 g/l glycerol and produced 8.6 g/l 1,3-propanediol. In the substitution case of yqhD (encoding alcohol dehydrogenase from E. coli) for dhaT, the final 1,3-propanediol concentration of the recombinant E. coli could reach 13.2 g/l.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9028120	Alcohol Dehydrogenase, recombinant from E. coli		9028-12-0	Price

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