Nature (London), 2011-03, Vol.471 (7340), p.602-607
2011
Details
- Autor(en) / Beteiligte
- Titel
- CRISPR RNA maturation by trans-encoded small RNA and host factor RNase III
- Ist Teil von
- Nature (London), 2011-03, Vol.471 (7340), p.602-607
- Ort / Verlag
- London: Nature Publishing Group
- Erscheinungsjahr
- 2011
- Link zum Volltext
- Quelle
- EBSCOhost Psychology and Behavioral Sciences Collection
- Beschreibungen/Notizen
- CRISPR/Cas systems constitute a widespread class of immunity systems that protect bacteria and archaea against phages and plasmids, and commonly use repeat/spacer-derived short crRNAs to silence foreign nucleic acids in a sequence-specific manner. Although the maturation of crRNAs represents a key event in CRISPR activation, the responsible endoribonucleases (CasE, Cas6, Csy4) are missing in many CRISPR/Cas subtypes. Here, differential RNA sequencing of the human pathogen Streptococcus pyogenes uncovered tracrRNA, a trans-encoded small RNA with 24-nucleotide complementarity to the repeat regions of crRNA precursor transcripts. We show that tracrRNA directs the maturation of crRNAs by the activities of the widely conserved endogenous RNase III and the CRISPR-associated Csn1 protein; all these components are essential to protect S. pyogenes against prophage-derived DNA. Our study reveals a novel pathway of small guide RNA maturation and the first example of a host factor (RNase III) required for bacterial RNA-mediated immunity against invaders.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0028-0836eISSN: 1476-4687DOI: 10.1038/nature09886Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_3070239
- Format
- –
- Schlagworte
- Archaea, Bacteria, Bacterial Proteins - chemistry, Bacterial Proteins - genetics, Bacterial Proteins - immunology, Bacterial Proteins - metabolism, Bacteriology, Biological and medical sciences, Conserved Sequence, DNA, Viral - genetics, DNA, Viral - metabolism, E coli, Escherichia coli, Fundamental and applied biological sciences. Psychology, Genetic aspects, Genetics, Microbiology, Models, Biological, Physiological aspects, Plasmids, Polymerase chain reaction, Prophages - genetics, Proteins, Ribonuclease, Ribonuclease III - metabolism, RNA, RNA Precursors - genetics, RNA Precursors - metabolism, RNA Processing, Post-Transcriptional, RNA, Bacterial - biosynthesis, RNA, Bacterial - genetics, RNA, Bacterial - immunology, RNA, Bacterial - metabolism, RNA, Guide - genetics, Streptococcus pyogenes, Streptococcus pyogenes - genetics, Streptococcus pyogenes - immunology, Streptococcus pyogenes - metabolism, Streptococcus pyogenes - virology