Mediator of RNA polymerase II transcription subunit 1
Mediator complexes are basic necessities for linking transcriptional regulators to RNA polymerase II. This domain, Med1, is conserved from plants to fungi to humans and forms part of the Med9 submodule of the Srb/Med complex. it is one of three subu ...
Mediator complexes are basic necessities for linking transcriptional regulators to RNA polymerase II. This domain, Med1, is conserved from plants to fungi to humans and forms part of the Med9 submodule of the Srb/Med complex. it is one of three subunits essential for viability of the whole organism via its role in environmentally-directed cell-fate decisions [1]. Med1 is part of the tail region of the Mediator complex [2].
Mediator complex subunit 16, central helical bridge
Med16 is one of the subunits of the Tail portion of the Mediator complex and is required for lipopolysaccharide gene-expression. This entry represents the central helical bridge domain [1,2].
Med18 is one subunit of Mediator, a head-module multiprotein complex, that stimulates basal RNA polymerase II (Pol II) transcription. Med18 consists of an eight-stranded beta-barrel with a central pore and three flanking helices. It complexes with Me ...
Med18 is one subunit of Mediator, a head-module multiprotein complex, that stimulates basal RNA polymerase II (Pol II) transcription. Med18 consists of an eight-stranded beta-barrel with a central pore and three flanking helices. It complexes with Med8 and Med20 proteins by forming a heterodimer of two-fold symmetry with Med20 and binding the C-terminal alpha-helix region of Med8 across the top of its barrel. This complex creates a multipartite TBP-binding site that can be modulated by transcriptional activators [1].
Med26_C is the C-terminal domain of subunit 26 of the Mediator complex in eukaryotes. Med19 and Med26 act synergistically to mediate the interaction between REST (a Kruppel-type zinc finger transcription factor that binds to a 21-bp RE1 silencing ele ...
Med26_C is the C-terminal domain of subunit 26 of the Mediator complex in eukaryotes. Med19 and Med26 act synergistically to mediate the interaction between REST (a Kruppel-type zinc finger transcription factor that binds to a 21-bp RE1 silencing element present in over 900 human genes) and Mediator [1]. The C-terminal domain is critical and sufficient for its assembly into Mediator and its interaction with Pol II. The most highly conserved C-terminal amino acids are critical for these interactions because deletion of the last eight amino acids from the Med26 C terminus disrupted binding to Mediator and Pol II [2].
