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• W2085757008 abstract "Ubiquitylation is a widespread post-translational global regulatory system that is essential for the proper functioning of various cellular events. Recent studies have shown that certain types of Escherichia coli can exploit specific aspects of the ubiquitylation system to influence downstream targets. Despite these findings, examination of the effects pathogenic E. coli have on the overall host ubiquitylation system remain unexplored. To study the impact that pathogenic E. coli have on the ubiquitylation levels of host proteins during infections, we analyzed the entire ubiquitylation system during enteropathogenic E. coli infections of cultured cells. We found that these microbes caused a dramatic decrease in ubiquitylated host proteins during these infections. This occurred with a concomitant reduction in the expression of essential E1 activating enzymes in the host, which are integral for the initiation of the ubiquitylation cascade. Control of host E1 enzyme levels was dependent on the E. coli adherence factor plasmid which acted on host aspartyl proteases within enteropathogenic E. coli. Hijacking of the ubiquitylation system did not require the plasmid-encoded regulator or bundle forming pilus expression, as enteropathogenic E. coli mutated in those factors did not revert the ubiquitylation of host proteins or the abundance of E1 enzyme proteins to uninfected levels. Our work shows that E. coli have developed strategies to usurp post-translational systems by targeting crucial enzymes. The ability of enteropathogenic E. coli to inactivate host protein ubiquitylation could enable more efficient effector protein functionality, providing increased bacterial control of host cells during enteropathogenic E. coli pathogenesis." @default.
• W2085757008 created "2016-06-24" @default.
• W2085757008 creator A5034140760 @default.
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• W2085757008 date "2012-12-01" @default.
• W2085757008 modified "2023-09-26" @default.
• W2085757008 title "The Escherichia coli adherence factor plasmid of enteropathogenic Escherichia coli causes a global decrease in ubiquitylated host cell proteins by decreasing ubiquitin E1 enzyme expression through host aspartyl proteases" @default.
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• W2085757008 doi "https://doi.org/10.1016/j.biocel.2012.09.005" @default.
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