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CpxR negatively regulates IncFII-replicon plasmid pEC011 conjugation by directly binding to multi-promoter regions.
- Source :
-
Research in veterinary science [Res Vet Sci] 2022 Dec 05; Vol. 150, pp. 98-106. Date of Electronic Publication: 2022 Jul 05. - Publication Year :
- 2022
-
Abstract
- CpxAR is a global regulatory protein and has important roles in plasmid mating. However, except for traJ, the regulatory effect of CpxAR on other tra genes is unclear. The aim of this study was to explore the effects of CpxAR on conjugative transfer of the epidemic plasmid pEC011 (IncFII replicon) in Escherichia coli. The plasmid mating frequencies were significantly higher for the single deletion mutant strain FΔcpxR than for the parental strain F25922. Additionally, expression levels of traM, traJ and traY in FΔcpxR were significantly higher than those in F25922. Further investigations revealed that His <subscript>6</subscript> <subscript>-</subscript> CpxR protein could directly bind to the traM, traJ and traY promoter regions with the binding sites of 5'-TTTACATT-3' (P <subscript>M</subscript> ), 5'-ATAAGAAT-3' (P <subscript>J</subscript> ), and 5'-AATTTTAT-3' (P <subscript>Y</subscript> ), respectively. Taken together, our results demonstrate that CpxAR can downregulate the expression of traM, traJ and traY by directly binding to the CpxR box-like sites of promoters, thus significantly reducing the mating rates of IncFII replicon plasmid pEC011.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)
- Subjects :
- Animals
Bacterial Outer Membrane Proteins genetics
Bacterial Outer Membrane Proteins metabolism
Bacterial Proteins genetics
Base Sequence
Escherichia coli genetics
Escherichia coli metabolism
F Factor
Plasmids genetics
Promoter Regions, Genetic
Replicon
Bacterial Proteins metabolism
Escherichia coli Proteins genetics
Escherichia coli Proteins metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1532-2661
- Volume :
- 150
- Database :
- MEDLINE
- Journal :
- Research in veterinary science
- Publication Type :
- Academic Journal
- Accession number :
- 35809419
- Full Text :
- https://doi.org/10.1016/j.rvsc.2022.05.016