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Click editing enables programmable genome writing using DNA polymerases and HUH endonucleases.

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Click editing is a new genome writing platform using DNA-dependent polymerases and RNA-programmable nickases to install precise DNA edits. This versatile technology enables diverse genomic modifications with high efficiency in human cells.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Genome editing technologies offer powerful tools for genetic modification.
  • DNA-dependent polymerases (DDPs) present unique advantages for installing diverse edits.
  • Existing methods may have limitations in precision or scope of edits.

Purpose of the Study:

  • To develop a novel genome writing platform for precise and versatile genome editing.
  • To couple the benefits of DDPs with RNA-programmable nickases for enhanced editing capabilities.
  • To enable the installation of a range of edits, including substitutions, insertions, and deletions.

Main Methods:

  • Development of the 'click editing' (CE) platform.
  • Utilizing HUH endonucleases for 'click'-like bioconjugation of DNA templates.
  • Employing RNA-programmable nickases to target specific genomic loci.
  • Iterative optimization of CE components and 'click DNA' (clkDNA) templates.
  • Screening of clkDNA modifications to enhance editing efficiency.

Main Results:

  • Demonstrated precise installation of substitutions, insertions, and deletions at targeted genomic loci.
  • Achieved precise editing efficiencies of up to approximately 30% in diverse human cell types.
  • Minimized unwanted insertions and deletions (indels) at editing sites.
  • Showcased improved editing efficiency through screening of modified clkDNA oligonucleotides.
  • Validated the versatility of click editing in immortalized human cell lines and primary fibroblasts.

Conclusions:

  • Click editing is a precise and versatile genome editing platform.
  • The technology leverages DDPs and RNA-programmable nickases for diverse genomic modifications.
  • Click editing offers a promising approach for various biological applications requiring accurate genome alterations.