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2015 ; 10
(12
): e0144763
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The SOS Response Master Regulator LexA Is Associated with Sporulation, Motility
and Biofilm Formation in Clostridium difficile
#MMPMID26682547
Walter BM
; Cartman ST
; Minton NP
; Butala M
; Rupnik M
PLoS One
2015[]; 10
(12
): e0144763
PMID26682547
show ga
The LexA regulated SOS network is a bacterial response to DNA damage of metabolic
or environmental origin. In Clostridium difficile, a nosocomial pathogen causing
a range of intestinal diseases, the in-silico deduced LexA network included the
core SOS genes involved in the DNA repair and genes involved in various other
biological functions that vary among different ribotypes. Here we describe the
construction and characterization of a lexA ClosTron mutant in C. difficile
R20291 strain. The mutation of lexA caused inhibition of cell division resulting
in a filamentous phenotype. The lexA mutant also showed decreased sporulation, a
reduction in swimming motility, greater sensitivity to metronidazole, and
increased biofilm formation. Changes in the regulation of toxin A, but not toxin
B, were observed in the lexA mutant in the presence of sub-inhibitory
concentrations of levofloxacin. C. difficile LexA is, therefore, not only a
regulator of DNA damage but also controls many biological functions associated
with virulence.
|Anti-Bacterial Agents/pharmacology
[MESH]
|Bacterial Proteins/*genetics/*metabolism
[MESH]
|Bacterial Toxins/metabolism
[MESH]
|Biofilms/drug effects/*growth & development
[MESH]