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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
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Screening for improved isoprenoid biosynthesis in microorganisms.

Anita Emmerstorfer-Augustin1, Sandra Moser2, Harald Pichler3

  • 1ACIB-Austrian Centre of Industrial Biotechnology, Petersgasse 14, 8010 Graz, Austria.

Journal of Biotechnology
|April 6, 2016
PubMed
Summary
This summary is machine-generated.

Recombinant microbes offer sustainable isoprenoid production, but face synthesis limitations. Directed evolution strategies and whole-cellular screening assays are advancing this field for diverse applications.

Keywords:
Directed evolutionHigh-throughput screeningIsoprene synthasesIsoprenoidProtein engineeringRandom mutagenesis

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Area of Science:

  • Biotechnology
  • Metabolic Engineering
  • Synthetic Biology

Background:

  • Isoprenoid production via recombinant microbes is crucial for flavors, fragrances, pharmaceuticals, agriculture, and fuels.
  • Traditional extraction and synthesis methods are often unsustainable and unprofitable.
  • Recombinant microbes exhibit limitations in specific isoprenoid synthesis, necessitating advanced engineering strategies.

Purpose of the Study:

  • To review and analyze directed evolution strategies for enhancing isoprenoid production in recombinant hosts.
  • To evaluate current screening methods for evolved isoprenoid-producing strains.
  • To identify future directions for improving isoprenoid synthesis in microbial systems.

Main Methods:

  • Development of diverse directed evolution strategies targeting host engineering and isoprenoid synthases.
  • Implementation of screening assays including colorimetric readouts for carotenoids, spectrophotometry, fluorescence, growth selection, and biosensors.
  • Focus on whole-cellular systems over cell extracts for screening.

Main Results:

  • Carotenoid-producing strains offer a prominent screening platform due to simple colorimetric readouts.
  • A trend towards creative, rigorous assays is observed, often relying on indirect detection of enzyme activity.
  • Whole-cellular systems are favored over cell extracts for screening purposes.

Conclusions:

  • Directed evolution is key to overcoming limitations in microbial isoprenoid synthesis.
  • Next-generation screening assays should prioritize broader applicability and direct assessment of isoprenoid levels.
  • Advancements in screening are essential for realizing the full potential of microbial isoprenoid production.