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| | ==Structure of the Mediator submodule Med7N/31== | | ==Structure of the Mediator submodule Med7N/31== |
| - | <StructureSection load='3fbi' size='340' side='right' caption='[[3fbi]], [[Resolution|resolution]] 2.80Å' scene=''> | + | <StructureSection load='3fbi' size='340' side='right'caption='[[3fbi]], [[Resolution|resolution]] 2.80Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3fbi]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FBI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3FBI FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3fbi]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3FBI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3FBI FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3fbn|3fbn]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MED7 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), MED31, SOH1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=3fbi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fbi OCA], [https://pdbe.org/3fbi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3fbi RCSB], [https://www.ebi.ac.uk/pdbsum/3fbi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3fbi ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3fbi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3fbi OCA], [http://pdbe.org/3fbi PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3fbi RCSB], [http://www.ebi.ac.uk/pdbsum/3fbi PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3fbi ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/MED7_YEAST MED7_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 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.<ref>PMID:11555651</ref> <ref>PMID:16076843</ref> <ref>PMID:16263706</ref> [[http://www.uniprot.org/uniprot/MED31_YEAST MED31_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 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.<ref>PMID:16076843</ref> <ref>PMID:16109375</ref> <ref>PMID:16263706</ref> | + | [https://www.uniprot.org/uniprot/MED7_YEAST MED7_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 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.<ref>PMID:11555651</ref> <ref>PMID:16076843</ref> <ref>PMID:16263706</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 18824]] | + | [[Category: Large Structures]] |
| - | [[Category: Baumli, S]] | + | [[Category: Saccharomyces cerevisiae]] |
| - | [[Category: Cramer, P]] | + | [[Category: Baumli S]] |
| - | [[Category: Koschubs, T]] | + | [[Category: Cramer P]] |
| - | [[Category: Kurth, F]] | + | [[Category: Koschubs T]] |
| - | [[Category: Lariviere, L]] | + | [[Category: Kurth F]] |
| - | [[Category: Martin, D E]] | + | [[Category: Lariviere L]] |
| - | [[Category: Seizl, M]] | + | [[Category: Martin DE]] |
| - | [[Category: Activator]]
| + | [[Category: Seizl M]] |
| - | [[Category: Nucleus]]
| + | |
| - | [[Category: Proline-rich stretch]]
| + | |
| - | [[Category: Protein-protein complex]]
| + | |
| - | [[Category: Right-handed four-helix bundle]]
| + | |
| - | [[Category: Transcription]]
| + | |
| - | [[Category: Transcription regulation]]
| + | |
| Structural highlights
Function
MED7_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 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.[1] [2] [3]
Publication Abstract from PubMed
Mediator is a modular multiprotein complex required for regulated transcription by RNA polymerase (Pol) II. Here, we show that the middle module of the Mediator core contains a submodule of unique structure and function that comprises the N-terminal part of subunit Med7 (Med7N) and the highly conserved subunit Med31 (Soh1). The Med7N/31 submodule shows a conserved novel fold, with two proline-rich stretches in Med7N wrapping around the right-handed four-helix bundle of Med31. In vitro, Med7N/31 is required for activated transcription and can act in trans when added exogenously. In vivo, Med7N/31 has a predominantly positive function on the expression of a specific subset of genes, including genes involved in methionine metabolism and iron transport. Comparative phenotyping and transcriptome profiling identify specific and overlapping functions of different Mediator submodules.
Identification, structure, and functional requirement of the Mediator submodule Med7N/31.,Koschubs T, Seizl M, Lariviere L, Kurth F, Baumli S, Martin DE, Cramer P EMBO J. 2009 Jan 7;28(1):69-80. Epub 2008 Dec 4. PMID:19057509[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kang JS, Kim SH, Hwang MS, Han SJ, Lee YC, Kim YJ. The structural and functional organization of the yeast mediator complex. J Biol Chem. 2001 Nov 9;276(45):42003-10. Epub 2001 Sep 12. PMID:11555651 doi:http://dx.doi.org/10.1074/jbc.M105961200
- ↑ Nair D, Kim Y, Myers LC. Mediator and TFIIH govern carboxyl-terminal domain-dependent transcription in yeast extracts. J Biol Chem. 2005 Oct 7;280(40):33739-48. Epub 2005 Aug 2. PMID:16076843 doi:http://dx.doi.org/M506067200
- ↑ Takagi Y, Kornberg RD. Mediator as a general transcription factor. J Biol Chem. 2006 Jan 6;281(1):80-9. Epub 2005 Nov 1. PMID:16263706 doi:http://dx.doi.org/M508253200
- ↑ Koschubs T, Seizl M, Lariviere L, Kurth F, Baumli S, Martin DE, Cramer P. Identification, structure, and functional requirement of the Mediator submodule Med7N/31. EMBO J. 2009 Jan 7;28(1):69-80. Epub 2008 Dec 4. PMID:19057509 doi:10.1038/emboj.2008.254
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