Programmable repression and activation of bacterial gene expression using an engineered CRISPR-Cas system.
Programmable repression and activation of bacterial gene expression using an engineered CRISPR-Cas system.
复制标题
使用工程CRISPR-CAS系统的可编程抑制和激活细菌基因表达。
DOI:
10.1093/nar/gkt520
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发表时间:
2013-08
影响因子:
14.9
通讯作者:
Marraffini LA
中科院分区:
文献类型:
--
作者:
Bikard D;Jiang W;Samai P;Hochschild A;Zhang F;Marraffini LA
The ability to artificially control transcription is essential both to the study of gene function and to the construction of synthetic gene networks with desired properties. Cas9 is an RNA-guided double-stranded DNA nuclease that participates in the CRISPR-Cas immune defense against prokaryotic viruses. We describe the use of a Cas9 nuclease mutant that retains DNA-binding activity and can be engineered as a programmable transcription repressor by preventing the binding of the RNA polymerase (RNAP) to promoter sequences or as a transcription terminator by blocking the running RNAP. In addition, a fusion between the omega subunit of the RNAP and a Cas9 nuclease mutant directed to bind upstream promoter regions can achieve programmable transcription activation. The simple and efficient modulation of gene expression achieved by this technology is a useful asset for the study of gene networks and for the development of synthetic biology and biotechnological applications.
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