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A Global View of the Selection Forces in the Evolution of Yeast Cis-Regulation

机译:酵母顺式调控演变中选择力的全球视角

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摘要

The interaction between transcription factors and their DNA binding sites is key to understanding gene regulation. By performing a genome-wide study of the evolutionary dynamics in yeast promoters, we provide a first global view of the network of selection forces in the evolution of transcription factor binding sites. This analysis gives rise to new models for binding site activity, identifies families of related binding sites, and characterizes the functional similarities among them. We discovered rich and highly optimized selective pressures operating inside and around these families. In several cases, this organization reveals that a single transcription factor has multiple functional modes. We demonstrate how such functional heterogeneity is related to the binding site's affinity and how it is exploited in transcription programs.
机译:转录因子及其DNA结合位点之间的相互作用是了解基因调控的关键。通过对酵母启动子中的进化动力学进行全基因组研究,我们提供了转录因子结合位点进化中选择力网络的第一个全局视图。这种分析产生了结合位点活性的新模型,鉴定了相关结合位点家族,并表征了它们之间的功能相似性。我们发现了在这些家庭内部和周围运作的丰富且高度优化的选择压力。在某些情况下,该组织揭示单个转录因子具有多种功能模式。我们展示了这种功能异质性如何与结合位点的亲和力相关,以及如何在转录程序中加以利用。

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