Emerging tools, enabling technologies, and future opportunities for the bioproduction of aromatic chemicals

Michael Machas, Gavin Kurgan, Amit K. Jha, Andrew Flores, Aidan Schneider, Sean Coyle, Arul Varman, Xuan Wang, David Nielsen

Research output: Contribution to journalReview article

2 Scopus citations

Abstract

Aromatic compounds, which are traditionally derived from petroleum feedstocks, represent a diverse class of molecules with a wide range of industrial and commercial applications. Significant progress has been made to alternatively and sustainably produce many aromatics from renewable substrates using microbial biocatalysts. While the construction of both natural and non-natural pathways has expanded the number and diversity of aromatic bioproducts, pathway modularization in both single- and multi-strain systems continues to support the enhancement of key production metrics towards economically-viable levels. Emerging tools for implementing more precise metabolic control (e.g. CRISPRi, sRNA) as well as the engineering of novel high-throughput screening platforms utilizing in vivo aromatic biosensors, meanwhile, continue to facilitate further optimization of both pathways and hosts. While product toxicity persists as a key challenge limiting the production of many aromatics, various successful strategies have been demonstrated towards improving tolerance, including via membrane and efflux pump engineering as well as by exploiting alternative production hosts. Finally, as a further step towards sustainable and economical aromatic bioproduction, non-model substrates including lignin-derived compounds continue to emerge as viable feedstocks. This review highlights recent and notable achievements related to such efforts while offering future outlooks towards engineering microbial cell factories for aromatic production.

Original languageEnglish (US)
Pages (from-to)38-52
Number of pages15
JournalJournal of Chemical Technology and Biotechnology
Volume94
Issue number1
DOIs
StatePublished - Jan 2019

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Keywords

  • biocatalysis
  • biology
  • industrial biotechnology
  • metabolic engineering
  • molecular

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Waste Management and Disposal
  • Pollution
  • Organic Chemistry
  • Inorganic Chemistry

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