CRISPR interference limits horizontal gene transfer in staphylococci by targeting DNA.
CRISPR interference limits horizontal gene transfer in staphylococci by targeting DNA.
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DOI:
10.1126/science.1165771
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发表时间:
2008-12-19
期刊:
影响因子:
--
通讯作者:
Sontheimer EJ
中科院分区:
文献类型:
--
作者:
Marraffini LA;Sontheimer EJ
Horizontal gene transfer (HGT) in bacteria and archaea occurs through phage transduction, transformation, or conjugation, and the latter is particularly important for the spread of antibiotic resistance. Clustered, regularly interspaced short palindromic repeats (CRISPR) loci confer sequence-directed immunity against phages. A clinical isolate of Staphylococcus epidermidis harbors a CRISPR spacer that matches the nickase gene present in nearly all staphylococcal conjugative plasmids. Here we show that CRISPR interference prevents conjugation and plasmid transformation in S. epidermidis. Insertion of a self-splicing intron into nickase blocks interference despite the reconstitution of the target sequence in the spliced mRNA, indicating that the interference machinery targets DNA directly. We conclude that CRISPR loci counteract multiple routes of HGT and can limit the spread of antibiotic resistance in pathogenic bacteria.
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发表时间:
2008-08-15
期刊:
Science (New York, N.Y.)
影响因子:
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