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Translesion (TLS) polymerases rescue stalled DNA polymerases at sites of damaged bases by replacing the replicative polymerase and installing a nucleotide across the damaged site. Doing so, TLS allows additional time for the cell to repair the damage before resuming regular DNA replication.
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RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
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Engineering Polymerases for New Functions.

Timothy A Coulther1, Hannah R Stern1, Penny J Beuning1

  • 1Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA 02115, USA.

Trends in Biotechnology
|April 21, 2019
PubMed
Summary
This summary is machine-generated.

This review covers engineered DNA polymerases for biotechnology. New DNA polymerase functions are created through mutagenesis and chimera creation, enabling advanced applications.

Keywords:
DNA damageDNA modificationDNA polymerasefidelityprocessivity

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Enzyme Engineering

Background:

  • DNA polymerases are essential for DNA amplification in biotechnology.
  • Natural DNA polymerases often lack desired functionalities for specific applications.
  • Engineering is crucial for developing novel DNA polymerase capabilities.

Purpose of the Study:

  • To review engineered DNA polymerases for biotechnology.
  • To discuss methods for engineering DNA polymerases with enhanced functions.
  • To highlight tools that facilitate further development in DNA polymerase engineering.

Main Methods:

  • Protein engineering techniques such as mutagenesis and creating protein chimeras.
  • Development of novel selection techniques, including selections in water-in-oil emulsions.
  • Analysis of existing literature on engineered DNA polymerases and their applications.

Main Results:

  • Engineered DNA polymerases exhibit improved properties, such as thermostability and inhibitor resistance.
  • Novel polymerases can copy modified DNA templates, expanding their utility.
  • Advanced engineering techniques offer greater flexibility compared to traditional methods like phage display.

Conclusions:

  • Engineering has significantly advanced DNA polymerase capabilities for biotechnology.
  • New techniques are continuously being developed to enhance DNA polymerase function.
  • Further research and development hold promise for even more sophisticated DNA polymerase tools.