View source for 4gwq


==Structure of the Mediator Head Module from S. cerevisiae in complex with the carboxy-terminal domain (CTD) of RNA Polymerase II Rpb1 subunit==
<StructureSection load='4gwq' size='340' side='right'caption='[[4gwq]], [[Resolution|resolution]] 4.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4gwq]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GWQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GWQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 4.5&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4gwq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4gwq OCA], [https://pdbe.org/4gwq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4gwq RCSB], [https://www.ebi.ac.uk/pdbsum/4gwq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4gwq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MED11_YEAST MED11_YEAST] Component of the Mediator complex, a coactivator involved in the regulated transcription of nearly all RNA polymerase II-dependent genes. Mediator functions as a bridge to convey information from gene-specific regulatory proteins to the basal RNA polymerase II transcription machinery. The Mediator complex, having a compact conformation in its free form, is recruited to promoters by direct interactions with regulatory proteins and serves for the assembly of a functional preinitiation complex (PIC) with RNA polymerase II and the general transcription factors. The Mediator complex unfolds to an extended conformation and partially surrounds RNA polymerase II, specifically interacting with the unphosphorylated form of the C-terminal domain (CTD) of RNA polymerase II. The Mediator complex dissociates from the RNA polymerase II holoenzyme and stays at the promoter when transcriptional elongation begins. The essential MED11/22 heterodimer specifically functions in promoting stable PIC formation.<ref>PMID:16076843</ref> <ref>PMID:16263706</ref> <ref>PMID:16885025</ref> <ref>PMID:18691966</ref> 
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae S288C]]
[[Category: Burlingame AL]]
[[Category: Bushnell DA]]
[[Category: Kornberg RD]]
[[Category: Robinson PJJ]]
[[Category: Trnka MJ]]