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Related Concept Videos

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Updated: Apr 26, 2026

Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms
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Efficient genome engineering in eukaryotes using Cas9 from Streptococcus thermophilus.

Kun Xu1, Chonghua Ren, Zhongtian Liu

  • 1Key Laboratory of Molecular Biology of Shaanxi Agriculture, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China.

Cellular and Molecular Life Sciences : CMLS
|July 21, 2014
PubMed
Summary
This summary is machine-generated.

Researchers optimized the Streptococcus thermophilus CRISPR3-Cas (StCas9) system for gene editing in yeast and human cells. The optimized single-guide RNA (sgRNA) design significantly improved targeting efficiency, paving the way for advanced eukaryotic gene editing platforms.

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Area of Science:

  • Molecular Biology
  • Gene Editing Technologies
  • Microbial Systems

Background:

  • The Streptococcus thermophilus CRISPR3-Cas (StCas9) system demonstrates DNA cleavage activity in various hosts and in vitro.
  • CRISPR-Cas systems are powerful tools for genome engineering.

Purpose of the Study:

  • To reconstitute and optimize the StCas9 system in yeast for eukaryotic gene editing.
  • To systematically analyze the structural requirements of sgRNA for StCas9 activity.
  • To enhance the targeting efficiency of StCas9 in eukaryotic cells.

Main Methods:

  • Reconstitution of the StCas9 system in yeast.
  • Systematic optimization of single-guide RNA (sgRNA) structure, including tracrRNA length, loop structure, Match II region, Bulge motif, crRNA guide sequence length, mismatch tolerance, and target sequence preference.
  • Assessment of targeting efficiencies in yeast and human cells.

Main Results:

  • Identification of optimal sgRNA structural features for StCas9.
  • Achieved up to 12% targeting efficiency in yeast cells.
  • Achieved up to 40% targeting efficiency in human cells.
  • Demonstrated StCas9's potential as a eukaryotic gene editing platform.

Conclusions:

  • The study provides crucial insights into the sequence and structural needs for StCas9-mediated gene editing.
  • Optimized sgRNA designs enhance the efficiency of StCas9 in eukaryotic systems.
  • This work contributes to the development of targeted and efficient eukaryotic gene editing platforms using CRISPR-Cas systems.