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Efficient silencing of the gene coding for the ε subunit of DNA polymerase III in Escherichia coli is triggered by antisense RNAs featuring stability in vivo

Author:
Stefan, Alessandra, Tabler, Martin, Hochkoeppler, Alejandro
Source:
FEMS microbiology letters 2007 v.270 no.2 pp. 277-283
ISSN:
0378-1097
Subject:
DNA-directed DNA polymerase, Escherichia coli, gene silencing, genes, messenger RNA
Abstract:
The Escherichia coli gene dnaQ coding for the ε subunit of DNA polymerase III was suppressed in vivo via antisense RNAs. To this aim, different fragments of dnaQ were cloned in reverse orientation into the pBAD-HisB vector or into pT3T7, and the corresponding antisense RNAs were conditionally expressed in vivo. Antisense transcripts featuring fast hybridization in vitro with dnaQ mRNA but lacking stability in vivo did not suppress the target gene. Moreover, the in vivo concentration of an antisense transcript was positively correlated to its silencing effectiveness.
Agid:
2537853