Phage Shock Protein and Gene Responses of Escherichia Coli Exposed to Carbon Nanotubes
Document Type
Article
Publication Date
2-25-2019
Publication Title
Chemosphere
Volume
224
First page number:
461
Last page number:
469
Abstract
Two-dimensional electrophoretic, western blotting, and quantitative polymerase chain reaction analyses of Escherichia coli cells exposed to pristine single walled carbon nanotubes (SWCNTs), and hydroxyl and carboxylic functionalized SWCNTs (SWCNT-OHs and SWCNT-COOHs) were conducted. SWCNT concentration and length were experimental variables. Exposing E. coli cells to SWCNTs led to changes in protein and gene expressions. Several proteins altered their regulations at a low SWCNT concentration (10 μg/ml) and were shut down at a high SWCNT concentration (100 μg/ml). The expressions of the phage shock protein (psp) operon including pspA, pspB, and pspC genes responded to the membrane stressors, SWCNTs, were also examined. While pspA and pspC expressions were influenced by the length, concentration, and functional groups of SWCNTs, pspB expression was not induced by SWCNTs. The alterations in phage shock protein and gene expressions indicated that SWCNTs caused cell membrane perturbation.
Keywords
Carbon nonotubes; Escherichia coli; Membrane perturbation; Proteins; Psp genes; Stress responses
Disciplines
Environmental Engineering
Language
English
Repository Citation
Anh Le, T.,
Thuptimdang, P.,
McEvoy, J. M.,
Khan, E.
(2019).
Phage Shock Protein and Gene Responses of Escherichia Coli Exposed to Carbon Nanotubes.
Chemosphere, 224
461-469.
http://dx.doi.org/10.1016/j.chemosphere.2019.02.159