Project description:CRISPR gene editing has revolutionized biomedicine and biotechnology by providing a simple means to engineer genes in vivo by introducing mutations at target sites in the genomic DNA of living cells. However, given the stochasticity of cellular DNA repair mechanisms and the potential for introducing mutations at off-target sites, technologies capable of introducing targeted changes with increased precision, such as cytidine deaminase single-base editors, are preferred. We here present a versatile method termed CRISPR-SKIP that utilizes cytidine deaminase single-base editors to program de-novo exon skipping by mutating target DNA bases within splice acceptor sites. Given its simplicity and precision, CRISPR-SKIP will be broadly applicable in gene therapy and synthetic biology.

2018-07-06 | GSE111644 | GEO

CRISPR-SKIP: Programmable Gene Splicing with Single Base Editors [off-targets]

2018-07-06 | GSE111645 | GEO

CRISPR-SKIP: Programmable Gene Splicing with Single Base Editors [RNA-seq]

2018-07-06 | GSE111643 | GEO

CRISPR-SKIP: programmable gene splicing with single base editors.

Project description: Not available

| S-EPMC6092781 | biostudies-literature

Transcriptome-wide off-target RNA editing induced by CRISPR-guided DNA base editors [Modifications - validation]

Project description:Base Editing has been touted the most intelligent and precise application of the CRISPR platform so far, merging the simplicity of RNA-guided nucleases with deaminases that allow for the programmable generation of single base substitutions - without introduction of double-strand breaks. Even though the two-component system has been expected to cause off-target substitutions, studies involving cytosine base editors (CBEs) showed that in most cases, relatively few single base off-targets could be detected on DNA. We introduce the concept of multi-dimensional off-targeting, presenting an extensive amount of RNA cytidines being edited by DNA base editors. Epitranscriptomic off-target effects affected different cell lines and were independent of the guide RNAs used, suggesting Cas9-independent activity of the cytidine deaminase rAPOBEC1 on single-stranded RNA. With the help of protein engineering, we developed CBE variants with massively reduced inadvertent mutation of RNA that preserve and enhance DNA base editing capabilities.

2019-03-31 | GSE121667 | GEO

Transcriptome-wide off-target RNA editing induced by CRISPR-guided DNA base editors [Modifications - screen]

2019-03-31 | GSE121666 | GEO

Transcriptome-wide off-target RNA editing induced by CRISPR-guided DNA base editors [BaseEditors - RNA]

2019-03-31 | GSE121665 | GEO