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• W2123359376 endingPage "10134" @default.
• W2123359376 startingPage "10124" @default.
• W2123359376 abstract "The successful synthesis of a transcript by RNA polymerase II (RNAPII) is a multistage process with distinct rate-limiting steps that can vary depending on the particular gene. A growing number of genes in a variety of organisms are regulated at steps after the recruitment of RNAPII. The best-characterized Saccharomyces cerevisiae gene regulated in this manner is CYC1. This gene has high occupancy of RNAPII under non-inducing conditions, defining it as a poised gene. Here, we find that subunits of the head module of Mediator, Med18 and Med20, and Med19 are required for activation of transcription at the CYC1 promoter in response to environmental cues. These subunits of Mediator are required at the preloaded promoter for normal levels of recruitment and activity of the general transcription factor TFIIH. Strikingly, these Mediator components are dispensable for activation by the same activator at a different gene, which lacks a preloaded polymerase in the promoter region. Based on these results and other studies, we speculate that Mediator plays an essential role in triggering an inactive polymerase at CYC1 into a productively elongating form." @default.
• W2123359376 created "2016-06-24" @default.
• W2123359376 creator A5025953066 @default.
• W2123359376 creator A5043321108 @default.
• W2123359376 creator A5080038169 @default.
• W2123359376 creator A5087757141 @default.
• W2123359376 date "2013-09-04" @default.
• W2123359376 modified "2023-10-14" @default.
• W2123359376 title "The head module of Mediator directs activation of preloaded RNAPII in vivo" @default.
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• W2123359376 doi "https://doi.org/10.1093/nar/gkt796" @default.
• W2123359376 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3905900" @default.
• W2123359376 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24005039" @default.
• W2123359376 hasPublicationYear "2013" @default.
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