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- W1949005637 abstract "Mediator is a large multiprotein complex conserved in all eukaryotes, which has a crucial coregulator function in transcription by RNA polymerase II (Pol II). However, the molecular mechanisms of its action in vivo remain to be understood. Med17 is an essential and central component of the Mediator head module. In this work, we utilised our large collection of conditional temperature-sensitive med17 mutants to investigate Mediator's role in coordinating preinitiation complex (PIC) formation in vivo at the genome level after a transfer to a non-permissive temperature for 45 minutes. The effect of a yeast mutation proposed to be equivalent to the human Med17-L371P responsible for infantile cerebral atrophy was also analyzed. The ChIP-seq results demonstrate that med17 mutations differentially affected the global presence of several PIC components including Mediator, TBP, TFIIH modules and Pol II. Our data show that Mediator stabilizes TFIIK kinase and TFIIH core modules independently, suggesting that the recruitment or the stability of TFIIH modules is regulated independently on yeast genome. We demonstrate that Mediator selectively contributes to TBP recruitment or stabilization to chromatin. This study provides an extensive genome-wide view of Mediator's role in PIC formation, suggesting that Mediator coordinates multiple steps of a PIC assembly pathway." @default.
- W1949005637 created "2016-06-24" @default.
- W1949005637 creator A5009877383 @default.
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- W1949005637 date "2015-08-03" @default.
- W1949005637 modified "2023-10-16" @default.
- W1949005637 title "Mediator independently orchestrates multiple steps of preinitiation complex assembly<i>in vivo</i>" @default.
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- W1949005637 doi "https://doi.org/10.1093/nar/gkv782" @default.
- W1949005637 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4627066" @default.
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- W1949005637 hasPublicationYear "2015" @default.
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