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Engineering altered protein-DNA recognition specificity.

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Protein engineering can create new DNA-binding proteins for genome modification. While challenging, advances in engineered enzymes like zinc finger proteins and TAL effectors offer unique advantages for DNA specificity.

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Area of Science:

  • Protein Engineering
  • Molecular Biology
  • Genomics

Background:

  • Protein engineering enables novel protein functions and structural understanding.
  • Reprogramming protein-protein interactions is feasible, but modifying protein-DNA interactions presents greater challenges due to complex interface features.
  • Despite difficulties, significant progress has been made in redesigning protein-DNA specificity.

Purpose of the Study:

  • To summarize the development of novel DNA specificities in engineered proteins.
  • To review engineered enzymes used for genome modification.
  • To discuss the factors influencing the ease of re-engineering DNA-binding proteins.

Main Methods:

  • Review of engineered DNA-binding proteins, including zinc finger proteins, meganucleases, TAL effectors, recombinases, and restriction endonucleases.
  • Analysis of protein modularity and evolutionary adaptability in modifying recognition specificities.
  • Evaluation of current platforms for engineered DNA-binding proteins.

Main Results:

  • Novel DNA specificities have been successfully created for various protein classes.
  • The ease of re-engineering is linked to protein modularity and natural selection adaptability.
  • Engineered enzymes are driving progress in genome modification through redesigned protein-DNA interactions.

Conclusions:

  • Current engineered DNA-binding proteins offer unique advantages for genome engineering.
  • Challenges remain in achieving ideal combinations of activity, specificity, deliverability, and outcomes.
  • Further research is needed to address the specific behaviors and properties of these engineered systems.