Recognition and maturation of effector RNAs in a CRISPR interference pathway
@article{Gesner2011RecognitionAM,
title={Recognition and maturation of effector RNAs in a CRISPR interference pathway},
author={Emily M. Gesner and Matthew J. Schellenberg and Erin L. Garside and Mark M George and Andrew M. MacMillan},
journal={Nature Structural \&Molecular Biology},
year={2011},
volume={18},
pages={688-692}
}In bacteria and archaea, small RNAs derived from clustered, regularly interspaced, short palindromic repeat (CRISPR) loci are involved in an adaptable and heritable gene-silencing pathway. Resistance to phage infection is conferred by the incorporation of short invading DNA sequences into the genome as CRISPR spacer elements separated by short repeat sequences. Processing of long primary transcripts (pre-crRNAs) containing these repeats by an RNA endonuclease generates the mature effector RNAs…
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References
SHOWING 1-10 OF 33 REFERENCES
Sequence- and Structure-Specific RNA Processing by a CRISPR Endonuclease
- BiologyScience
- 2010
The RNA recognition mechanism identified here explains sequence- and structure-specific processing by a large family of CRISPR-specific endoribonucleases.
Cas6 is an endoribonuclease that generates guide RNAs for invader defense in prokaryotes.
- BiologyGenes & development
- 2008
This work has identified Pyrococcus furiosus Cas6 as a novel endoribonuclease that cleaves CRISPR RNAs within the repeat sequences to release individual invader targeting RNAs.
Small CRISPR RNAs Guide Antiviral Defense in Prokaryotes
- BiologyScience
- 2008
The results demonstrate that the formation of mature guide RNAs by the CRISPR RNA endonuclease subunit of Cascade is a mechanistic requirement for antiviral defense.
Interaction of the Cas6 riboendonuclease with CRISPR RNAs: recognition and cleavage.
- BiologyStructure
- 2011
A putative RNA-interference-based immune system in prokaryotes: computational analysis of the predicted enzymatic machinery, functional analogies with eukaryotic RNAi, and hypothetical mechanisms of action
- BiologyBiology Direct
- 2006
It appears most likely that CASS is a prokaryotic system of defense against phages and plasmids that functions via the RNAi mechanism, which seems to involve integration of fragments of foreign genes into archaeal and bacterial chromosomes yielding heritable immunity to the respective agents.
Structural basis for DNase activity of a conserved protein implicated in CRISPR-mediated genome defense.
- BiologyStructure
- 2009
Transcription profile of Thermus thermophilus CRISPR systems after phage infection.
- BiologyJournal of molecular biology
- 2010
Transcription, processing and function of CRISPR cassettes in Escherichia coli
- BiologyMolecular microbiology
- 2010
Using an engineered strain with genomically located spacer matching phage λ, it is shown that endogenous levels of CRISPR cassette and cas genes expression allow only weak protection against infection with the phage, however, derepression of the CRISpr/Cas system by disruption of the hns gene leads to high level of protection.
CRISPR Interference Limits Horizontal Gene Transfer in Staphylococci by Targeting DNA
- BiologyScience
- 2008
It is shown that CRISPR interference prevents conjugation and plasmid transformation in S. epidermidis and can limit the spread of antibiotic resistance in pathogenic bacteria.
Identification of genes that are associated with DNA repeats in prokaryotes
- BiologyMolecular microbiology
- 2002
A novel family of repetitive DNA sequences that is present among both domains of the prokaryotes but absent from eukaryotes or viruses is studied, characterized by direct repeats, varying in size from 21 to 37 bp, interspaced by similarly sized non‐repetitive sequences.




