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The Central Dogma01:20

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Rapid Characterization of Genetic Parts with Cell-Free Systems
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Building artificial genetic circuits to understand protein function.

Louis H Scott1, James C Mathews1, Aleksandra Filipovska2

  • 1Harry Perkins Institute of Medical Research, Nedlands, WA, Australia; The University of Western Australia Centre for Medical Research, Crawley, WA, Australia.

Methods in Enzymology
|February 13, 2020
PubMed
Summary
This summary is machine-generated.

Deep mutational scanning analyzes millions of protein variants to understand protein function. This study details using yeast genetic circuits to link protein mutations to selectable functions, aiding drug discovery for antimicrobial resistance.

Keywords:
Antibiotic resistanceBiosensorDeep mutational scanningGenetic circuitStructure-function relationshipSynthetic biology

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Yeast Genetics

Background:

  • Protein function is complex and not fully understood from 3D structures alone.
  • Mutant protein analysis offers insights into intrinsic protein properties.
  • Deep mutational scanning (DMS) is a high-throughput method for functional protein variant analysis.

Purpose of the Study:

  • To outline the use of artificial genetic circuits in yeast for DMS.
  • To demonstrate how to engineer genetic selections, construct mutant libraries, and analyze sequencing data for DMS.
  • To investigate structure-function relationships of the TetX protein using DMS.

Main Methods:

  • Engineering artificial genetic circuits in Saccharomyces cerevisiae.
  • Developing methods for constructing mutant protein libraries.
  • Implementing high-throughput sequencing data analysis.
  • Applying DMS to study the antimicrobial resistance protein TetX.

Main Results:

  • Demonstrated the utility of yeast genetic circuits for coupling genotype to phenotype in DMS.
  • Successfully applied DMS to dissect residue importance in TetX function.
  • Provided a framework for the general application of DMS in protein engineering.

Conclusions:

  • Deep mutational scanning is a powerful technique for understanding protein residue importance.
  • This approach facilitates the rational design of new drugs to combat antimicrobial resistance.
  • Yeast-based genetic circuits are effective tools for enabling high-throughput protein variant analysis.