Cited by 347CRISPR and Genetic EngineeringRNA regulation and diseaseEnzyme Catalysis and Immobilization

The DOI matches its Crossref record; 65 of the 65 references it cites were found in a registry or an index.

Continuous evolution of base editors with expanded target compatibility and improved activity

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Abstract

Base editors use DNA-modifying enzymes targeted with a catalytically impaired CRISPR protein to precisely install point mutations. Here, we develop phage-assisted continuous evolution of base editors (BE-PACE) to improve their editing efficiency and target sequence compatibility. We used BE-PACE to evolve cytosine base editors (CBEs) that overcome target sequence context constraints of canonical CBEs. One evolved CBE, evoAPOBEC1-BE4max, is up to 26-fold more efficient at editing cytosine in the GC context, a disfavored context for wild-type APOBEC1 deaminase, while maintaining efficient editing in all other sequence contexts tested. Another evolved deaminase, evoFERNY, is 29% smaller than APOBEC1 and edits efficiently in all tested sequence contexts. We also evolved a CBE based on CDA1 deaminase with much higher editing efficiency at difficult target sites. Finally, we used data from evolved CBEs to illuminate the relationship between deaminase activity, base editing efficiency, editing window width and byproduct formation. These findings establish a system for rapid evolution of base editors and inform their use and improvement.

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Metadata

Authors
Thuronyi, B. W., Koblan, L. W., Levy, J. M., Yeh, W.-H., Zheng, C., Newby, G. A., Wilson, C., Bhaumik, M., Shubina-Oleinik, O., Holt, J. R., & Liu, D. R.
Affiliations
  • Broad Institute (US)
  • Harvard University (US)
  • Boston Children's Hospital (US)
Corresponding author
Liu, David R.
Venue
Nature Biotechnology
Published
2019-07-22
Volume
37
Issue
9
Pages
1070-1079
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W2963629338
Cited by
347
References
65
Citations by year
2026: 31 · 2025: 56 · 2024: 55 · 2023: 51 · 2022: 46 · 2021: 45 · 2020: 53 · 2019: 9
FWCI
12.65
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion)
Funders
  • U.S. Department of Health & Human Services | NIH | National Institute of Allergy and Infectious Diseases (U01 AI142756)
  • U.S. Department of Health & Human Services | NIH | National Human Genome Research Institute (RM1 HG009490)
  • U.S. Department of Health & Human Services | NIH | National Institute of Biomedical Imaging and Bioengineering (R01 EB022376)
  • U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (R35 GM118062)
  • United States Department of Defense | Defense Advanced Research Projects Agency (HR0011-17-2-0049)
  • Howard Hughes Medical Institute (Liu Investigatorship)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA regulation and disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme Catalysis and Immobilization
Keywords
base editors, phage-assisted continuous evolution, cytosine base editors, editing efficiency, deaminase activity, by-product formation
MeSH terms
Gene Editing, Adenosine Deaminase, Animals, Base Sequence, Cell Line, Humans, Gene Expression Regulation, Enzymologic, Gene Targeting, Directed Molecular Evolution, Mice, INDEL Mutation, CRISPR-Cas Systems

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