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- W2136935595 abstract "Studies of natural populations of many organisms have shown that traits are often complex, caused by contributions of mutations in multiple genes. In contrast, genetic studies in the laboratory primarily focus on studying the phenotypes caused by mutations in a single gene. However, the single mutation approach may be limited with respect to the breadth and degree of new phenotypes that can be found. We have taken the approach of isolating complex, or polygenic mutants in the lab to study the regulation of transcriptional activation distance in yeast. While most aspects of eukaryotic transcription are conserved from yeast to human, transcriptional activation distance is not. In Saccharomyces cerevisiae, the upstream activating sequence (UAS) is generally found within 450 base pairs of the transcription start site (TSS) and when the UAS is moved too far away, activation no longer occurs. In contrast, metazoan enhancers can activate from as far as several hundred kilobases from the TSS. Previously, we identified single mutations that allow transcription activation to occur at a greater-than-normal distance from the GAL1 UAS. As the single mutant phenotypes were weak, we have now isolated polygenic mutants that possess strong long-distance phenotypes. By identification of the causative mutations we have accounted for most of the heritability of the phenotype in each strain and have provided evidence that the Mediator coactivator complex plays both positive and negative roles in the regulation of transcription activation distance." @default.
- W2136935595 created "2016-06-24" @default.
- W2136935595 creator A5011196794 @default.
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- W2136935595 date "2015-08-17" @default.
- W2136935595 modified "2023-10-07" @default.
- W2136935595 title "Analysis of Polygenic Mutants Suggests a Role for Mediator in Regulating Transcriptional Activation Distance in <i>Saccharomyces cerevisiae</i>" @default.
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- W2136935595 doi "https://doi.org/10.1534/genetics.115.181164" @default.
- W2136935595 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4596672" @default.
- W2136935595 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26281848" @default.
- W2136935595 hasPublicationYear "2015" @default.
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