Project description:Med13 cardiac over-expression regulates cardiac gene expression and metabolism Hearts from Med13 alphaMHC transgenic mice and wild type littermates
Project description:Med13 cardiac over-expression regulates obesity. Liver, WAT and BAT from alphaMHC-Med13 TG mice was analyzed Liver, WAT and BAT from Med13 alphaMHC transgenic mice and wild type littermates
Project description:This SuperSeries is composed of the following subset Series: GSE35902: Cardiac over-expression of Med13 GSE35903: Cardiac over-expression of Med13, non-cardiac tissue analysis Med13 cardiac transgenic mice were back-crossed 4 or more generations to C57Bl6 mice. Refer to individual Series
Project description:Purpose: The objective of this study was to determine cardiac transcriptional pathways regulated in response to 1.) hypothyroidism and re-establishment of a euthyroid state and 2.) Med13-dependent cardiac transcriptional pathways regulated in response to hypothyroidism and re-establishment of a euthyroid state
Project description:The eukaryotic transcriptional Mediator comprises a large Core (cMED) and a dissociable CDK8 kinase module (CKM). cMED recruits RNA polymerase II (Pol II) and promotes pre-initiation complex formation in a manner repressed by the CKM through mechanisms presently unknown. Herein we report cryo-electron microscopy structures of the complete human Mediator and its CKM. Combined with biochemical and functional analyses, these structures provide a mechanistic framework to explain the basis for CKM-mediated repression of cMED function. The CKM binds to cMED at multiple sites through both MED12 and a large intrinsically disordered region (IDR) in MED13. The MED13 IDR blocks Pol II/MED26 recruitment onto cMED by direct occlusion of their corresponding binding sites, leading to functional repression of cMED-dependent transcription. Notably, the CKM is anchored to the cMED Hook, positioning CDK8 downstream and proximal to the transcription start site, which sheds new light on its stimulatory function in post-initiation events.