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- W2082943088 abstract "Cyclic AMP (cAMP) is a signaling molecule that is involved in the regulation of multiple virulence systems of the opportunistic pathogen Pseudomonas aeruginosa. The intracellular concentration of cAMP in P. aeruginosa cells is tightly controlled at the levels of cAMP synthesis and degradation through regulation of the activity and/or expression of the adenylate cyclases CyaA and CyaB or the cAMP phosphodiesterase CpdA. Interestingly, mutants of fimL, which usually demonstrate defective twitching motility, frequently revert to a wild-type twitching-motility phenotype presumably via the acquisition of an extragenic suppressor mutation(s). In this study, we have characterized five independent fimL twitching-motility revertants and have determined that all have increased intracellular cAMP levels compared with the parent fimL mutant. Whole-genome sequencing revealed that only one of these fimL revertants has acquired a loss-of-function mutation in cpdA that accounts for the elevated levels of intracellular cAMP. As mutation of cpdA did not account for the restoration of twitching motility observed in the other four fimL revertants, these observations suggest that there is at least another, as yet unidentified, site of extragenic suppressor mutation that can cause phenotypic reversion in fimL mutants and modulation of intracellular cAMP levels of P. aeruginosa." @default.
- W2082943088 created "2016-06-24" @default.
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- W2082943088 date "2012-11-28" @default.
- W2082943088 modified "2023-09-24" @default.
- W2082943088 title "Extragenic suppressor mutations that restore twitching motility to <scp> <i>fimL</i> </scp> mutants of <i> <scp>P</scp> seudomonas aeruginosa </i> are associated with elevated intracellular cyclic <scp>AMP</scp> levels" @default.
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- W2082943088 doi "https://doi.org/10.1002/mbo3.49" @default.
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