DNA stretching induces Cas9 off-target activity.
Identifieur interne : 000928 ( PubMed/Corpus ); précédent : 000927; suivant : 000929DNA stretching induces Cas9 off-target activity.
Auteurs : Matthew D. Newton ; Benjamin J. Taylor ; Rosalie P C. Driessen ; Leonie Roos ; Nevena Cvetesic ; Shenaz Allyjaun ; Boris Lenhard ; Maria Emanuela Cuomo ; David S. RuedaSource :
- Nature structural & molecular biology [ 1545-9985 ] ; 2019.
English descriptors
- KwdEn :
- Bacteriophage lambda (genetics), CRISPR-Associated Protein 9 (metabolism), CRISPR-Cas Systems (genetics), Clustered Regularly Interspaced Short Palindromic Repeats (genetics), DNA Cleavage, DNA, Viral (genetics), DNA, Viral (metabolism), Escherichia coli (virology), Fluorescence Resonance Energy Transfer, Gene Editing, Microfluidics, Microscopy, Confocal, Optical Tweezers, RNA, Guide (genetics), Streptococcus pyogenes (enzymology).
- MESH :
- chemical , genetics : DNA, Viral, RNA, Guide.
- chemical , metabolism : CRISPR-Associated Protein 9, DNA, Viral.
- enzymology : Streptococcus pyogenes.
- genetics : Bacteriophage lambda, CRISPR-Cas Systems, Clustered Regularly Interspaced Short Palindromic Repeats.
- virology : Escherichia coli.
- DNA Cleavage, Fluorescence Resonance Energy Transfer, Gene Editing, Microfluidics, Microscopy, Confocal, Optical Tweezers.
Abstract
CRISPR/Cas9 is a powerful genome-editing tool, but spurious off-target edits present a barrier to therapeutic applications. To understand how CRISPR/Cas9 discriminates between on-targets and off-targets, we have developed a single-molecule assay combining optical tweezers with fluorescence to monitor binding to λ-DNA. At low forces, the Streptococcus pyogenes Cas9 complex binds and cleaves DNA specifically. At higher forces, numerous off-target binding events appear repeatedly at the same off-target sites in a guide-RNA-sequence-dependent manner, driven by the mechanical distortion of the DNA. Using single-molecule Förster resonance energy transfer (smFRET) and cleavage assays, we show that DNA bubbles induce off-target binding and cleavage at these sites, even with ten mismatches, as well as at previously identified in vivo off-targets. We propose that duplex DNA destabilization during cellular processes (for example, transcription, replication, etc.) can expose these cryptic off-target sites to Cas9 activity, highlighting the need for improved off-target prediction algorithms.
DOI: 10.1038/s41594-019-0188-z
PubMed: 30804513
Links to Exploration step
pubmed:30804513Le document en format XML
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<term>CRISPR-Associated Protein 9 (metabolism)</term>
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<term>Clustered Regularly Interspaced Short Palindromic Repeats (genetics)</term>
<term>DNA Cleavage</term>
<term>DNA, Viral (genetics)</term>
<term>DNA, Viral (metabolism)</term>
<term>Escherichia coli (virology)</term>
<term>Fluorescence Resonance Energy Transfer</term>
<term>Gene Editing</term>
<term>Microfluidics</term>
<term>Microscopy, Confocal</term>
<term>Optical Tweezers</term>
<term>RNA, Guide (genetics)</term>
<term>Streptococcus pyogenes (enzymology)</term>
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<term>DNA, Viral</term>
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<keywords scheme="MESH" xml:lang="en"><term>DNA Cleavage</term>
<term>Fluorescence Resonance Energy Transfer</term>
<term>Gene Editing</term>
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<front><div type="abstract" xml:lang="en">CRISPR/Cas9 is a powerful genome-editing tool, but spurious off-target edits present a barrier to therapeutic applications. To understand how CRISPR/Cas9 discriminates between on-targets and off-targets, we have developed a single-molecule assay combining optical tweezers with fluorescence to monitor binding to λ-DNA. At low forces, the Streptococcus pyogenes Cas9 complex binds and cleaves DNA specifically. At higher forces, numerous off-target binding events appear repeatedly at the same off-target sites in a guide-RNA-sequence-dependent manner, driven by the mechanical distortion of the DNA. Using single-molecule Förster resonance energy transfer (smFRET) and cleavage assays, we show that DNA bubbles induce off-target binding and cleavage at these sites, even with ten mismatches, as well as at previously identified in vivo off-targets. We propose that duplex DNA destabilization during cellular processes (for example, transcription, replication, etc.) can expose these cryptic off-target sites to Cas9 activity, highlighting the need for improved off-target prediction algorithms.</div>
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<Abstract><AbstractText>CRISPR/Cas9 is a powerful genome-editing tool, but spurious off-target edits present a barrier to therapeutic applications. To understand how CRISPR/Cas9 discriminates between on-targets and off-targets, we have developed a single-molecule assay combining optical tweezers with fluorescence to monitor binding to λ-DNA. At low forces, the Streptococcus pyogenes Cas9 complex binds and cleaves DNA specifically. At higher forces, numerous off-target binding events appear repeatedly at the same off-target sites in a guide-RNA-sequence-dependent manner, driven by the mechanical distortion of the DNA. Using single-molecule Förster resonance energy transfer (smFRET) and cleavage assays, we show that DNA bubbles induce off-target binding and cleavage at these sites, even with ten mismatches, as well as at previously identified in vivo off-targets. We propose that duplex DNA destabilization during cellular processes (for example, transcription, replication, etc.) can expose these cryptic off-target sites to Cas9 activity, highlighting the need for improved off-target prediction algorithms.</AbstractText>
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