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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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CRISPR/Cas9 Genome Editing01:28

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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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CRISPR01:59

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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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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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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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Gene Digital Circuits Based on CRISPR-Cas Systems and Anti-CRISPR Proteins
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CRISPR-Cas-Based Engineering of Probiotics.

Ling Liu1,2, Shimaa Elsayed Helal1, Nan Peng1

  • 1National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China.

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Summary
This summary is machine-generated.

CRISPR-Cas systems offer precise genome editing for probiotics, overcoming challenges in understanding their health benefits and mechanisms. This enables the development of enhanced probiotics for various applications.

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Area of Science:

  • Microbiology
  • Genetics
  • Biotechnology

Background:

  • Probiotics are widely utilized in food and medicine, but their health benefits and mechanisms remain unclear, hindering further development.
  • Genome editing techniques are crucial for elucidating probiotic functions and improving their properties.

Purpose of the Study:

  • To review CRISPR-Cas systems in probiotics, including their classification, distribution, and associated editing tools.
  • To discuss the application of CRISPR-Cas systems for probiotic genome editing and the resulting engineered probiotics.

Main Methods:

  • Literature review on CRISPR-Cas systems in probiotics.
  • Analysis of CRISPR-Cas system classification, distribution, and tool development.
  • Discussion of genome editing strategies and applications of engineered probiotics.

Main Results:

  • CRISPR-Cas systems are effective genome editing tools for probiotics due to their high efficiency, flexibility, and specificity.
  • Various CRISPR-Cas based tools have been developed for probiotic genome editing.
  • Engineered probiotics using CRISPR-Cas systems show potential for diverse applications.

Conclusions:

  • CRISPR-Cas systems represent a significant advancement in probiotic research and engineering.
  • Genome editing with CRISPR-Cas facilitates a deeper understanding of probiotic mechanisms and functional enhancement.
  • A design route for CRISPR systems in genetically engineered probiotics is proposed.