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Related Concept Videos

CRISPR/Cas9 Genome Editing01:28

CRISPR/Cas9 Genome Editing

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The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...
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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 and crRNAs02:53

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Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Genome Editing in Mammalian Cell Lines using CRISPR-Cas
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A quick guide to CRISPR sgRNA design tools.

Vincent A Brazelton1,2, Scott Zarecor3, David A Wright3

  • 1a Interdepartmental Genetics and Genomics Program; Iowa State University ; Ames , IA USA.

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CRISPR-Cas9 gene editing is a powerful biotechnology tool. This review compares CRISPR design tools, including CGAT, to aid researchers in selecting the best option for their specific genome editing needs.

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Area of Science:

  • Biotechnology
  • Genetics
  • Molecular Biology

Background:

  • CRISPR-Cas9 is a revolutionary gene editing technology enabling targeted modifications in diverse organisms.
  • Its efficiency, specificity, and minimal off-target effects make it a preferred method in molecular biology research.
  • Numerous CRISPR design tools exist, offering varied functionalities for selecting guide RNA sequences and predicting editing outcomes.

Purpose of the Study:

  • To provide a comprehensive review of available CRISPR design tools.
  • To assist researchers in selecting the most suitable tool for their specific CRISPR-Cas9 applications.
  • To introduce and highlight the features of the CRISPR Genome Analysis Tool (CGAT).

Main Methods:

  • Systematic review of existing CRISPR design tools.
  • Comparative analysis of tool features, including design rules, genome compatibility, visualization, and analysis capabilities.
  • Functional assessment of the CRISPR Genome Analysis Tool (CGAT).

Main Results:

  • Significant variation exists among CRISPR design tools in terms of parameters, supported genomes, and analytical functions.
  • The CRISPR Genome Analysis Tool (CGAT) offers a user-friendly interface and robust features for designing and analyzing CRISPR experiments.
  • No single tool perfectly suits all research scenarios, emphasizing the need for informed selection.

Conclusions:

  • The selection of an appropriate CRISPR design tool is critical for successful genome editing experiments.
  • CGAT provides a valuable resource for researchers, complementing existing tools in the CRISPR-Cas9 ecosystem.
  • Further development and comparative studies of CRISPR design tools will enhance the efficiency and accessibility of genome editing technologies.