Inhibition of expression in Escherichia coli of a virulence regulator MglB of Francisella tularensis using external guide sequence technology
| Autor: | Mina Izadjoo, Eirik W. Lundblad, Sidney Altman, Gaoping Xiao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Virulence Factors
RNase P Molecular Sequence Data Virulence lcsh:Medicine Biology medicine.disease_cause Ribonuclease P Microbiology/Applied Microbiology Gene expression Escherichia coli medicine Biotechnology/Applied Microbiology RNA Messenger Francisella tularensis lcsh:Science Molecular Biology Gene Messenger RNA Multidisciplinary Base Sequence MRNA cleavage lcsh:R Nucleotide Mapping Gene Expression Regulation Bacterial biology.organism_classification Molecular biology RNA Bacterial Genes Bacterial Electrophoresis Polyacrylamide Gel lcsh:Q Research Article |
| Zdroj: | PLoS ONE, Vol 3, Iss 11, p e3719 (2008) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | External guide sequences (EGSs) have successfully been used to inhibit expression of target genes at the post-transcriptional level in both prokaryotes and eukaryotes. We previously reported that EGS accessible and cleavable sites in the target RNAs can rapidly be identified by screening random EGS (rEGS) libraries. Here the method of screening rEGS libraries and a partial RNase T1 digestion assay were used to identify sites accessible to EGSs in the mRNA of a global virulence regulator MglB from Francisella tularensis, a Gram-negative pathogenic bacterium. Specific EGSs were subsequently designed and their activities in terms of the cleavage of mglB mRNA by RNase P were tested in vitro and in vivo. EGS73, EGS148, and EGS155 in both stem and M1 EGS constructs induced mglB mRNA cleavage in vitro. Expression of stem EGS73 and EGS155 in Escherichia coli resulted in significant reduction of the mglB mRNA level coded for the F. tularensis mglB gene inserted in those cells. |
| Databáze: | OpenAIRE |
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