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2015 ; 5
(ä): 15287
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Identification of novel sRNAs involved in biofilm formation, motility, and
fimbriae formation in Escherichia coli
#MMPMID26469694
Bak G
; Lee J
; Suk S
; Kim D
; Young Lee J
; Kim KS
; Choi BS
; Lee Y
Sci Rep
2015[Oct]; 5
(ä): 15287
PMID26469694
show ga
Bacterial small RNAs (sRNAs) are known regulators in many physiological
processes. In Escherichia coli, a large number of sRNAs have been predicted,
among which only about a hundred are experimentally validated. Despite
considerable research, the majority of their functions remain uncovered.
Therefore, collective analysis of the roles of sRNAs in specific cellular
processes may provide an effective approach to identify their functions. Here, we
constructed a collection of plasmids overexpressing 99 individual sRNAs, and
analyzed their effects on biofilm formation and related phenotypes. Thirty-three
sRNAs significantly affecting these cellular processes were identified. No
consistent correlations were observed, except that all five sRNAs suppressing
type I fimbriae inhibited biofilm formation. Interestingly, IS118, yet to be
characterized, suppressed all the processes. Our data not only reveal potentially
critical functions of individual sRNAs in biofilm formation and other phenotypes
but also highlight the unexpected complexity of sRNA-mediated metabolic pathways
leading to these processes.