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Biosynthetic pathway for acrylic acid from glycerol in recombinant Escherichia coli

Abstract

Acrylic acid is an important industrial feedstock. In this study, a de novo acrylate biosynthetic pathway from inexpensive carbon source glycerol was constructed in Escherichia coli. The acrylic acid was produced from glycerol via 3-hydroxypropionaldehyde, 3-hydroxypropionyl-CoA, and acrylyl-CoA. The acrylate production was improved by screening and site-directed mutagenesis of key enzyme enoyl-CoA hydratase and chromosomal integration of some exogenous genes. Finally, our recombinant strain produced 37.7 mg/L acrylic acid under shaking flask conditions. Although the acrylate production is low, our study shows feasibility of engineering an acrylate biosynthetic pathway from inexpensive carbon source. Furthermore, the reasons for limited acrylate production and further strain optimization that should be performed in the future were also discussed.

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Acknowledgments

This work was supported by the 100-Talent Project of CAS (for GZ), CAS Key Program (KGZD-EW-606-1-3), and Taishan Scholars Climbing Program of Shandong (No.TSPD20150210).

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Correspondence to Huizhou Liu or Guang Zhao.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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The authors declare that they have no competing interests.

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Tong, W., Xu, Y., Xian, M. et al. Biosynthetic pathway for acrylic acid from glycerol in recombinant Escherichia coli . Appl Microbiol Biotechnol 100, 4901–4907 (2016). https://doi.org/10.1007/s00253-015-7272-z

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  • DOI: https://doi.org/10.1007/s00253-015-7272-z

Keywords

  • Acrylic acid biosynthesis
  • Enoyl-CoA hydratase
  • Recombinant Escherichia coli
  • Inexpensive carbon source