Exposure to Glycolytic Carbon Sources Reveals a Novel Layer of Regulation for the MalT Regulon
2011
How Glycolytic Carbon Sources Help E. coli Survive
publication
Evidence: moderate
Author Information
Author(s): Sylvia A. Reimann, Alan J. Wolfe
Primary Institution: Loyola University Chicago
Hypothesis
We hypothesize that this regulation requires metabolism of glycolysis-associated carbon sources.
Conclusion
The study reveals that certain glycolytic carbon sources can promote the survival of a synthetic lethal E. coli mutant by reducing the expression of a harmful protein.
Supporting Evidence
- The ompR malTcon double mutant exhibits a synthetic lethal phenotype that is environmentally conditional.
- Exposure to glucose and maltose reduces the expression of the outer membrane porin LamB.
- Sorbitol promotes cell survival by reducing LamB expression.
Takeaway
Some sugars can help bacteria stay alive even when they have harmful mutations. This study found that sugars like sorbitol and maltose can help E. coli survive by changing how they use their food.
Methodology
The study involved growing E. coli mutants under different carbon source conditions and measuring their survival and gene expression.
Digital Object Identifier (DOI)
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