CRISPR–Cas systems: beyond adaptive immunity

@article{Westra2014CRISPRCasSB,
  title={CRISPR–Cas systems: beyond adaptive immunity},
  author={Edze R. Westra and Angus Buckling and Peter C. Fineran},
  journal={Nature Reviews Microbiology},
  year={2014},
  volume={12},
  pages={317-326}
}
The discovery of CRISPR–Cas (clustered, regularly interspaced short palindromic repeats–CRISPR-associated proteins) adaptive immune systems in prokaryotes has been one of the most exciting advances in microbiology in the past decade. Their role in host protection against mobile genetic elements is now well established, but there is mounting evidence that these systems modulate other processes, such as the genetic regulation of group behaviour and virulence, DNA repair and genome evolution. In… 

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References

SHOWING 1-10 OF 103 REFERENCES
Degeneration of a CRISPR/Cas system and its regulatory target during the evolution of a pathogen
TLDR
Genomic analyses revealed that Francisella species with increased virulence harbor degenerated CRISPR/Cas systems, and these data suggest additional genomic changes may be required to maintain fitness after CRISpr/Cas loss in such bacteria, having important evolutionary implications.
Evolution and classification of the CRISPR–Cas systems
TLDR
An updated analysis of the evolutionary relationships between CRISPR–Cas systems and Cas proteins is provided and a 'polythetic' classification that integrates the phylogenies of the most common cas genes, the sequence and organization of theCRISPR repeats and the architecture of the CRISpr–cas loci is proposed.
Diversity of CRISPR loci in Escherichia coli.
TLDR
The data suggest that the degeneration of one CRISPR/CAS system in E. coli ancestors could have been brought about by self-interference, and substantiate different levels of activity between loci of both CRISpr types, as well as different target preferences andCRISPR relevances for particular groups of strains.
CRISPR interference: a structural perspective
TLDR
Recent progress on the structural biology of the CRISPR/Cas system is covered, focusing on the Cas proteins and complexes that catalyse crRNA biogenesis and interference.
CRISPR-mediated adaptive immune systems in bacteria and archaea.
TLDR
The mechanisms of CRISPR-mediated immunity are reviewed and the ecological and evolutionary implications of these adaptive defense systems are discussed.
The CRISPRs, they are a-changin': how prokaryotes generate adaptive immunity.
TLDR
This review focuses on the type I-E CRISPR/Cas system of the model bacterium Escherichia coli K12, a prokaryotic adaptive immune system that displays major structural and functional differences in their mode of generating resistance against invading nucleic acids.
A CRISPR-CAS System Mediates Bacterial Innate Immune Evasion and Virulence
TLDR
It is demonstrated that the Cas protein Cas9 of Francisella novicida uses a unique, small, CRISPR/Cas-associated RNA (scaRNA) to repress an endogenous transcript encoding a bacterial lipoprotein.
Bacteriophage genes that inactivate the CRISPR/Cas bacterial immune system
TLDR
The first examples of genes that mediate the inhibition of a CRISPR/Cas system are described, found in the genomes of bacteriophages infecting Pseudomonas aeruginosa and provides new insight into the co-evolution of phages and bacteria.
Cytotoxic Chromosomal Targeting by CRISPR/Cas Systems Can Reshape Bacterial Genomes and Expel or Remodel Pathogenicity Islands
TLDR
In DNA–targeting CRISPR/Cas systems, chromosomal interference is deleterious by causing DNA damage and providing a strong selective pressure for genome alterations, which may have consequences for bacterial evolution and pathogenicity.
...
1
2
3
4
5
...