7z1m
From Proteopedia
(Difference between revisions)
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<StructureSection load='7z1m' size='340' side='right'caption='[[7z1m]], [[Resolution|resolution]] 3.40Å' scene=''> | <StructureSection load='7z1m' size='340' side='right'caption='[[7z1m]], [[Resolution|resolution]] 3.40Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[7z1m]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_W303 Saccharomyces cerevisiae W303]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Z1M OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Z1M FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[7z1m]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_W303 Saccharomyces cerevisiae W303] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7Z1M OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7Z1M FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4QM:(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-DIMETHYL-17-[(2R)-PENTAN-2-YL]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-TETRADECAHYDRO-1H-CYCLOPENTA[A]PHENANTHRENE-3,7,12-TRIOL'>4QM</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.4Å</td></tr> |
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4QM:(3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-DIMETHYL-17-[(2R)-PENTAN-2-YL]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-TETRADECAHYDRO-1H-CYCLOPENTA[A]PHENANTHRENE-3,7,12-TRIOL'>4QM</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=7z1m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7z1m OCA], [https://pdbe.org/7z1m PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7z1m RCSB], [https://www.ebi.ac.uk/pdbsum/7z1m PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7z1m ProSAT]</span></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=7z1m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7z1m OCA], [https://pdbe.org/7z1m PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7z1m RCSB], [https://www.ebi.ac.uk/pdbsum/7z1m PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7z1m ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| - | + | [https://www.uniprot.org/uniprot/RPAB2_YEAST RPAB2_YEAST] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Common component of RNA polymerases I, II and III which synthesize ribosomal RNA precursors, mRNA precursors and many functional non-coding RNAs, and small RNAs, such as 5S rRNA and tRNAs, respectively. Pol II is the central component of the basal RNA polymerase II transcription machinery. Pols are composed of mobile elements that move relative to each other. In Pol II, RPB6 is part of the clamp element and togther with parts of RPB1 and RPB2 forms a pocket to which the RPB4-RPB7 subcomplex binds (By similarity). | |
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | RNA polymerase (Pol) III is specialized to transcribe short, abundant RNAs, for which it terminates transcription on polythymine (dT) stretches on the non-template (NT) strand. When Pol III reaches the termination signal, it pauses and forms the pre-termination complex (PTC). Here, we report cryoelectron microscopy (cryo-EM) structures of the yeast Pol III PTC and complementary functional states at resolutions of 2.7-3.9 A. Pol III recognizes the poly(dT) termination signal with subunit C128 that forms a hydrogen-bond network with the NT strand and, thereby, induces pausing. Mutating key interacting residues interferes with transcription termination in vitro, impairs yeast growth, and causes global termination defects in vivo, confirming our structural results. Additional cryo-EM analysis reveals that C53-C37, a Pol III subcomplex and key termination factor, participates indirectly in Pol III termination. We propose a mechanistic model of Pol III transcription termination and rationalize why Pol III, unlike Pol I and Pol II, terminates on poly(dT) signals. | ||
| + | |||
| + | Architecture of the yeast Pol III pre-termination complex and pausing mechanism on poly(dT) termination signals.,Girbig M, Xie J, Grotsch H, Libri D, Porrua O, Muller CW Cell Rep. 2022 Sep 6;40(10):111316. doi: 10.1016/j.celrep.2022.111316. PMID:36070694<ref>PMID:36070694</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 7z1m" style="background-color:#fffaf0;"></div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[RNA polymerase 3D structures|RNA polymerase 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Saccharomyces cerevisiae W303]] | [[Category: Saccharomyces cerevisiae W303]] | ||
| + | [[Category: Synthetic construct]] | ||
[[Category: Girbig M]] | [[Category: Girbig M]] | ||
[[Category: Mueller CW]] | [[Category: Mueller CW]] | ||
Current revision
Structure of yeast RNA Polymerase III Elongation Complex (EC)
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