2017
DOI: 10.7554/elife.25100
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Complex chromosomal neighborhood effects determine the adaptive potential of a gene under selection

Abstract: How the organization of genes on a chromosome shapes adaptation is essential for understanding evolutionary paths. Here, we investigate how adaptation to rapidly increasing levels of antibiotic depends on the chromosomal neighborhood of a drug-resistance gene inserted at different positions of the Escherichia coli chromosome. Using a dual-fluorescence reporter that allows us to distinguish gene amplifications from other up-mutations, we track in real-time adaptive changes in expression of the drug-resistance g… Show more

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Cited by 19 publications
(32 citation statements)
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References 70 publications
(117 reference statements)
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“…High rates of mutation caused by insertion and removal of either short duplications or IS elements can thus play an important role in the ecology and evolution of bacteria. Recent experiments also support this perspective [ 34 , 64 ].…”
Section: Discussionmentioning
confidence: 75%
“…High rates of mutation caused by insertion and removal of either short duplications or IS elements can thus play an important role in the ecology and evolution of bacteria. Recent experiments also support this perspective [ 34 , 64 ].…”
Section: Discussionmentioning
confidence: 75%
“…We sought to construct a reporter for CNVs that occur at a given locus of interest. Based on previous studies [5356], we hypothesized that CNVs that alter the number of copies of a constitutively expressed fluorescent protein gene would facilitate single-cell detection of de novo copy number variation. To test the feasibility of this approach, we constructed haploid S .…”
Section: Resultsmentioning
confidence: 99%
“…Based on previous studies [53][54][55][56] , we hypothesized that CNVs that alter the number of copies of a constitutively expressed fluorescent protein gene would facilitate single cell detection of de novo copy number variation. To test the feasibility of this approach, we constructed haploid Saccharomyces cerevisiae strains isogenic to the reference strain (S288c) with one or two copies of a constitutively expressed GFP variant, mCitrine [57] , and diploid strains with 1-4 copies of mCitrine integrated into the genome ( Table S1 ).…”
Section: Resultsmentioning
confidence: 99%