Journal of Microbiology

Research Support, Non-U.S. Gov't

NOTE] Biosynthetic Pathway for Poly(3-Hydroxypropionate) in Recombinant Escherichia coli: Qi Wang , Changshui Liu , Mo Xian , Yongguang Zhang , Guang Zhao; J. Microbiol. 2012;50(4):693-697. Published online August 25, 2012; DOI: https://doi.org/10.1007/s12275-012-2234-y

Abstract: Poly(3-hydroxypropionate) (P3HP) is a biodegradable and biocompatible thermoplastic. In this study, we engineered a P3HP biosynthetic pathway in recombinant Escherichia coli. The genes for malonyl-CoA reductase (mcr, from Chloroflexus aurantiacus), propionyl-CoA synthetase (prpE, from E. coli), and polyhydroxyalkanoate synthase (phaC1, from Ralstonia eutropha) were cloned and expressed in E. coli. The E. coli genes accABCD encoding acetyl-CoA carboxylase were used to channel the carbon into the P3HP pathway. Using glucose as a sole carbon source, the cell yield and P3HP content were 1.32 g/L and 0.98% (wt/wt [cell dry weight]), respectively. Although the yield is relatively low, our study shows the feasibility of engineering a P3HP biosynthetic pathway using a structurally unrelated carbon source in bacteria.

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