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Detection of Functional Matrix Metalloproteinases by Zymography
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Periplasmic Screening for Artificial Metalloenzymes.

M Jeschek1, S Panke1, T R Ward2

  • 1ETH Zurich, Basel, Switzerland.

Methods in Enzymology
|September 3, 2016
PubMed
Summary

We developed a high-throughput screening platform for artificial metalloenzymes using streptavidin-biotin technology in E. coli. This method enhances directed evolution of transition metal biocatalysts for broader applications.

Keywords:
Artificial metalloenzymeBiocatalysisDirected evolutionEnzyme engineeringHigh-throughput screeningMutagenesis librariesPeriplasmStreptavidin

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Area of Science:

  • Biocatalysis
  • Synthetic Biology
  • Protein Engineering

Background:

  • Artificial metalloenzymes combine transition metal catalysts with enzyme benefits.
  • Current directed evolution methods for these biocatalysts are limited by laborious protein purification, hindering throughput.
  • A need exists for efficient screening platforms to accelerate the development of novel artificial metalloenzymes.

Purpose of the Study:

  • To develop and present a high-throughput screening platform for the directed evolution of artificial metalloenzymes.
  • To leverage streptavidin-biotin technology within the periplasm of Escherichia coli for enhanced screening.
  • To establish a generalized guideline for developing novel transition metal-based biocatalysts.

Main Methods:

  • Utilized streptavidin-biotin technology for compartmentalization within the periplasm of Escherichia coli.
  • Implemented a screening platform to overcome limitations of individual protein variant purification.
  • Focused on directed evolution strategies for artificial metalloenzymes.

Main Results:

  • Developed a novel screening platform that significantly increases the throughput of directed evolution campaigns.
  • Demonstrated the advantages of periplasmic compartmentalization for artificial metalloenzyme development.
  • The strategy is valuable for both in vitro evolution and potential in vivo applications.

Conclusions:

  • The developed periplasmic screening platform drastically enhances the efficiency of directed evolution for artificial metalloenzymes.
  • This strategy offers a generalized approach to expand the repertoire of transition metal biocatalysts.
  • The method holds promise for future in vivo applications and broader biocatalyst development.