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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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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 stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this...
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Substrate Generation for Endonucleases of CRISPR/Cas Systems
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CRISPR-Cas in Streptococcus pyogenes.

Anaïs Le Rhun1, Andrés Escalera-Maurer1,2, Majda Bratovič1,2

  • 1a Max Planck Unit for the Science of Pathogens , Berlin , Germany.

RNA Biology
|March 12, 2019
PubMed
Summary
This summary is machine-generated.

The CRISPR-Cas immune system in Streptococcus pyogenes, including CRISPR-Cas9, is crucial for bacterial evolution and has revolutionized genome editing. This review covers its biological roles and biotechnological applications.

Keywords:
CRISPRCas9Streptococcus pyogenesadaptive immune systemgenome editingmobile genetic elementsphages

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • The prokaryotic CRISPR-Cas immune system, particularly CRISPR-Cas9 from Streptococcus pyogenes, is fundamental to genome editing technologies.
  • Despite widespread applications, the biological significance of CRISPR-Cas systems in S. pyogenes remains understudied.

Purpose of the Study:

  • To provide a comprehensive overview of CRISPR-Cas systems in S. pyogenes.
  • To explore the evolutionary role of CRISPR-mediated immunity and horizontal gene transfer in this pathogen.
  • To detail the biochemical and functional characteristics of S. pyogenes CRISPR-Cas types I-C and II-A.

Main Methods:

  • Literature review of CRISPR-Cas systems in Streptococcus pyogenes.
  • Analysis of the interplay between CRISPR immunity and horizontal gene transfer.
  • Description of biochemical and functional features of identified CRISPR-Cas types.

Main Results:

  • Streptococcus pyogenes harbors both type I-C and type II-A CRISPR-Cas systems.
  • CRISPR-mediated immunity likely influenced the evolution of S. pyogenes through interactions with horizontal gene transfer.
  • The CRISPR-Cas9 system from S. pyogenes is a key tool in modern biotechnology.

Conclusions:

  • CRISPR-Cas systems in S. pyogenes play a significant role in bacterial evolution and defense.
  • Understanding these systems enhances our knowledge of microbial genetics and evolution.
  • The discovery of CRISPR-Cas9 in S. pyogenes has paved the way for revolutionary genome engineering applications.