Abstract
A key feature of the CRISPR-Cas defense system is the ability of the host to rapidly acquire novel spacers from invasive foreign genetic elements such as plasmids, viruses, or transposons. Consequently, host CRISPR loci have the potential to provide time-resolved information about exposure to foreign genetic elements as well as fine-scale ecological diversity. Furthermore, viral genomes can mutate rapidly, allowing viruses to circumvent the host CRISPR-encoded immunity system, which relies on close matches between spacers and incoming nucleic acids. Thus, CRISPR-Cas systems may drive complex, coevolving relationships between bacteria or archaea and viruses. We discuss how ecologically based approaches, in both natural and experimental systems, provide unique insights into host and viral diversity and horizontal gene transfer of CRISPR loci. We critically review recent attempts to model host-viral coevolutionary dynamics in the context of CRISPR loci. Finally, we highlight the future directions in which experimental analyses of host-viral coevolution can be fruitfully combined with theoretical approaches.
Original language | English (US) |
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Title of host publication | CRISPR-Cas Systems |
Subtitle of host publication | RNA-Mediated Adaptive Immunity in Bacteria and Archaea |
Editors | Rodolphe Barrangou, John van der Oost |
Publisher | Springer |
Pages | 221-250 |
Number of pages | 30 |
ISBN (Electronic) | 9783642346576 |
ISBN (Print) | 9783642346569 |
DOIs | |
State | Published - Jan 1 2013 |
Keywords
- strain-specific spacers
ASJC Scopus subject areas
- General Immunology and Microbiology