Prediction of synonymous corrections by the BE-FF computational tool expands the targeting scope of base editing
Open Access
- 7 April 2020
- journal article
- research article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 48 (W1), W340-W347
- https://doi.org/10.1093/nar/gkaa215
Abstract
Base editing is a genome-editing approach that employs the CRISPR/Cas system to precisely install point mutations within the genome. A deaminase enzyme is fused to a deactivated Cas and enables transition conversions. The diversified repertoire of base editors provides a wide range of base editing possibilities. However, existing base editors cannot induce transversion substitutions and activate only within a specified region relative to the binding site, thus, they cannot precisely correct every point mutation. Here, we present BE-FF (Base Editors Functional Finder), a novel computational tool that identifies suitable base editors to correct the translated sequence erred by a point mutation. When a precise correction is impossible, BE-FF aims to mutate bystander nucleotides in order to induce synonymous corrections that will correct the coding sequence. To measure BE-FF practicality, we analysed a database of human pathogenic point mutations. Out of the transition mutations, 60.9% coding sequences could be corrected. Notably, 19.4% of the feasible corrections were not achieved by precise corrections but only by synonymous corrections. Moreover, 298 cases of transversion-derived pathogenic mutations were detected to be potentially repairable by base editing via synonymous corrections, although base editing is considered impractical for such mutations.Keywords
Funding Information
- Tel Aviv University
This publication has 40 references indexed in Scilit:
- Programmable editing of a target base in genomic DNA without double-stranded DNA cleavageNature, 2016
- Repair Pathway Choices and Consequences at the Double-Strand BreakTrends in Cell Biology, 2015
- CCTop: An Intuitive, Flexible and Reliable CRISPR/Cas9 Target Prediction ToolPLOS ONE, 2015
- Cas-OFFinder: a fast and versatile algorithm that searches for potential off-target sites of Cas9 RNA-guided endonucleasesBioinformatics, 2014
- Genome engineering using the CRISPR-Cas9 systemNature Protocols, 2013
- Repurposing CRISPR as an RNA-Guided Platform for Sequence-Specific Control of Gene ExpressionCell, 2013
- Multiplex Genome Engineering Using CRISPR/Cas SystemsScience, 2013
- A Programmable Dual-RNA–Guided DNA Endonuclease in Adaptive Bacterial ImmunityScience, 2012
- Miscoding Properties of 2′-Deoxyinosine, a Nitric Oxide-Derived DNA Adduct, during Translesion Synthesis Catalyzed by Human DNA PolymerasesJournal of Molecular Biology, 2008
- A different genetic code in human mitochondriaNature, 1979