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The DOI matches its Crossref record.

CRISPR Provides Acquired Resistance Against Viruses in Prokaryotes

Barrangou, Rodolphe, Fremaux, Christophe, Deveau, Hélène, Richards, Melissa, Boyaval, Patrick, Moineau, Sylvain, Romero, Dennis A., Horvath, Philippe·2007·Science

Abstract

Clustered regularly interspaced short palindromic repeats (CRISPR) are a distinctive feature of the genomes of most Bacteria and Archaea and are thought to be involved in resistance to bacteriophages. We found that, after viral challenge, bacteria integrated new spacers derived from phage genomic sequences. Removal or addition of particular spacers modified the phage-resistance phenotype of the cell. Thus, CRISPR, together with associated cas genes, provided resistance against phages, and resistance specificity is determined by spacer-phage sequence similarity.

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Crossref · 10.1126/science.1138140

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  • In Streptococcus thermophilus, experimental evidence established CRISPR as a crucial element of the bacterial defence system against bacteriophage infection.

    “In a landmark study, experimental evidence established CRISPR as a crucial element of the bacterial defence system against bacteriophage infection [7].”
  • Bacteria developed an adaptive defence system, CRISPR, to protect themselves against bacteriophages.

    “In order to protect themselves from this kind of invader, bacteria developed an ingenious adaptive defence system, clustered regularly interspaced short palindromic repeats (CRISPR).”
  • Challenging a phage-sensitive wild-type S. thermophilus strain with two different virulent bacteriophages generated nine different phage-resistant S. thermophilus strains.

    “To test this possibility, a phage-sensitive wild-type (WT) S. thermophilus strain was challenged with two different virulent bacteriophages. This resulted in the generation of nine different phage-resistant S. thermophilus strains”
  • Sequencing of spacer sequences of the CRISPR system in S. thermophilus revealed that these spacers were homologous to some bacteriophage and plasmid sequences.

    “Sequencing of the spacer sequences of the CRISPR system revealed that these spacers were homologous to some bacteriophage and plasmid sequences, leading to the hypothesis that CRISPR was a defence mechanism of bacteria against foreign elements.”
  • The sequences of the new spacers in the phage-resistant S. thermophilus strains were similar to sequences within the genome of the phages used in the experiment.

    “Additionally, the sequences of these new spacers were similar to sequences within the genome of the phages used in the experiment.”

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Research works printed but not linked: 21

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  21. We thank L. Bayer C. Vos and A.-C. Coûté-Monvoisin of Danisco Innovation as well as J. Labonté and D. Tremblay of Université Laval for technical support and E. Bech Hansen for discussions and critical review of the manuscript. Also we thank T. R. Klaenhammer for providing the integration system. This work was supported by funding from Danisco A/S. Also S. M. would like to acknowledge support from the Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Program. Sequences were deposited in GenBank accession numbers EF434458 to EF434504.

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Metadata

Authors
Barrangou, R., Fremaux, C., Deveau, H., Richards, M., Boyaval, P., Moineau, S., Romero, D. A., & Horvath, P.
Affiliations
Danisco USA Inc., 3329 Agriculture Drive, Madison, WI 53716, USA.
Venue
Science
Published
2007-03-23
Volume
315
Issue
5819
Pages
1709-1712
ISSN
  • 0036-8075
  • 1095-9203
Cited by
5,947
References
0
Language
en

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