Inhibition of expression in Escherichia coli of a virulence regulator MglB of Francisella tularensis using external guide sequence technology

Gaoping Xiao, Eirik W. Lundblad, Mina Izadjoo, Sidney Altman

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Article numbere3719
JournalPLoS One
Volume3
Issue number11
DOIs
StatePublished - Nov 13 2008
Externally publishedYes

Fingerprint

Francisella tularensis
Escherichia coli
Virulence
virulence
screening
Technology
Messenger RNA
stems
DNA libraries
prokaryotic cells
Libraries
eukaryotic cells
Screening
genes
Genes
digestion
Ribonuclease P
RNA
Ribonuclease T1
bacteria

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

Inhibition of expression in Escherichia coli of a virulence regulator MglB of Francisella tularensis using external guide sequence technology. / Xiao, Gaoping; Lundblad, Eirik W.; Izadjoo, Mina; Altman, Sidney.

In: PLoS One, Vol. 3, No. 11, e3719, 13.11.2008.

Research output: Contribution to journalArticle

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