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Positive Epistasis Drives the Acquisition of Multidrug Resistance
Trindade, S.; Sousa, A.; Xavier, KB.; Dionisio, F.; Ferreira, MG.; Gordo, I.The evolution of multiple antibiotic resistance is an increasing global problem. Resistance mutations are known to impair fitness, and the evolution of resistance to multiple drugs depends both on their costs individually and on how they interact-epistasis. Information on the level of epistasis between antibiotic resistance mutations is of key importance to understanding epistasis amongst deleterious alleles, a...
The crystal structure of the Escherichia coli autoinducer-2 processing protein ...
Diaz, Z.; Xavier, KB.; Miller, ST.Many bacteria produce and respond to the quorum sensing signal autoinducer-2 (AI-2). Escherichia coli and Salmonella typhimurium are among the species with the lsr operon, an operon containing AI-2 transport and processing genes that are up regulated in response to AI-2. One of the Lsr proteins, LsrF, has been implicated in processing the phosphorylated form of AI-2. Here, we present the structure of LsrF, unli...
Positive Epistasis Drives the Acquisition of Multidrug Resistance
Trindade, S.; Sousa, A.; Xavier, KB.; Dionisio, F.; Ferreira, MG.; Gordo, I.The evolution of multiple antibiotic resistance is an increasing global problem. Resistance mutations are known to impair fitness, and the evolution of resistance to multiple drugs depends both on their costs individually and on how they interact-epistasis. Information on the level of epistasis between antibiotic resistance mutations is of key importance to understanding epistasis amongst deleterious alleles, a...
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