Abstract
Polyhydroxyalkanoates (PHAs) that contain varied monomers with different chain lengths/structures were normally synthesized when a structurally-related precursor was present. The biosynthesis of PHAs from unrelated carbon sources in microorganisms including Escherichia coli met many challenges in the past. Recently, with the development of metabolic engineering and synthetic biology, the production of PHAs from unrelated carbon sources obtained a breakthrough. Polyesters containing 2-hydroxypropionate, 3-hydroxypropionate, 4-hydroxybutyrate, 3-hydroxyvalarate, and medium-chain-length 3-hydroxyalkanoate monomers can all be synthesized in E. coli by integrating exogenous or endogenous pathways and/or genes. This review will summarize the progresses in this area. In addition, the strategies that lead to the production of PHAs with varied monomers and high polymer content in the cell are discussed.
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Acknowledgments
This research was financially supported by a grant from the National Basic Research Program of China (2011CB707405, 2012CB725202) and grants from the National Natural Science Foundation of China (31200033) and the promotive research fund for excellent, young, and middle-aged scientists of Shandong Province (BS2012SW005).
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Wang, Q., Zhuang, Q., Liang, Q. et al. Polyhydroxyalkanoic acids from structurally-unrelated carbon sources in Escherichia coli . Appl Microbiol Biotechnol 97, 3301–3307 (2013). https://doi.org/10.1007/s00253-013-4809-x
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DOI: https://doi.org/10.1007/s00253-013-4809-x