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Related Concept Videos

CRISPR01:59

CRISPR

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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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CRISPR Gene Editing Tool for MicroRNA Cluster Network Analysis
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Microfluidic tool for rapid functional characterization of CRISPR complexes.

Dana Peleg-Chen1, Guy Shuvali1, Lev Brio1

  • 1The Mina & Everard Goodman Faculty of Life Sciences and the Institute for Nanotechnology and Advanced Materials, Bar Ilan University, Ramat-Gan, Israel.

New Biotechnology
|January 13, 2022
PubMed
Summary
This summary is machine-generated.

A new microfluidic method, EnzyMIF, rapidly characterizes CRISPR-Cas9 enzyme kinetics, addressing challenges in genome editing safety and efficiency. This tool predicts cleavage quality, correlating with in-cell editing outcomes.

Keywords:
Association and dissociation rateCRISPR editingEnzymatic kinetic activityHiFi CAS9

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Bioengineering

Background:

  • CRISPR-Cas9 technology holds promise for genome editing but faces challenges in clinical application, specifically off-target effects and variable editing efficiency.
  • Accurate measurement of CRISPR enzyme kinetics (binding and cleavage) is crucial for improving safety and efficacy, yet current methods are often limited.
  • Understanding the enzymatic interactions of RNA-guided nucleases is essential for their therapeutic development.

Purpose of the Study:

  • To introduce and validate a novel microfluidic platform, EnzyMIF, for the rapid and quantitative characterization of CRISPR complex enzymatic interactions and function.
  • To assess the utility of EnzyMIF in determining key kinetic parameters (Kd, koff, Km, kcat) for RNA-guided nucleases.
  • To correlate EnzyMIF-derived biochemical data with actual in-cell genome editing efficiency.

Main Methods:

  • Development and application of a microfluidic platform (EnzyMIF) for analyzing CRISPR-Cas9 enzyme kinetics.
  • Measurement of binding and cleavage kinetic parameters for two single-guide RNAs (RAG1 and RAG2) with differing in-cell cleavage efficiencies.
  • Comparison of EnzyMIF results with in-cell genomic editing efficiency data using both wild-type (WT) and HiFi Cas9 variants.

Main Results:

  • The EnzyMIF assay successfully detected kinetic parameters (Kd, koff, Km, kcat) for the tested RNA-guided nucleases.
  • Biochemical characterization via EnzyMIF provided explanations for the differential in-cell cleavage efficiencies observed between RAG1 and RAG2 guide RNAs.
  • EnzyMIF characterization results demonstrated a strong correlation with established cell culture genomic editing efficiency outcomes.

Conclusions:

  • EnzyMIF offers a rapid and quantitative method for characterizing the enzymatic activity of CRISPR complexes.
  • The platform can elucidate the biochemical basis for variations in guide RNA performance.
  • EnzyMIF has the potential to serve as a predictive tool for assessing CRISPR-Cas9 cleavage quality and guiding therapeutic development.