View source for 8yfq


==Cryo EM structure of Komagataella phaffii RNAPII-Rat1-Rai1 pre-termination complex==
<StructureSection load='8yfq' size='340' side='right'caption='[[8yfq]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8yfq]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Komagataella_phaffii Komagataella phaffii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8YFQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8YFQ FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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=8yfq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8yfq OCA], [https://pdbe.org/8yfq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8yfq RCSB], [https://www.ebi.ac.uk/pdbsum/8yfq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8yfq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C4R4Y0_KOMPG C4R4Y0_KOMPG] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates.[RuleBase:RU004279]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The 5 -3 exoribonuclease Rat1/Xrn2 is responsible for the termination of eukaryotic mRNA transcription by RNAPII. Rat1 forms a complex with its partner proteins, Rai1 and Rtt103, and acts as a "torpedo" to bind transcribing RNAPII and dissociate DNA/RNA from it. Here we report the cryo-electron microscopy structures of the Rat1-Rai1-Rtt103 complex and three Rat1-Rai1-associated RNAPII complexes (type-1, type-1b, and type-2) from the yeast, Komagataella phaffii. The Rat1-Rai1-Rtt103 structure revealed that Rat1 and Rai1 form a heterotetramer with a single Rtt103 bound between two Rai1 molecules. In the type-1 complex, Rat1-Rai1 forms a heterodimer and binds to the RNA exit site of RNAPII to extract RNA into the Rat1 exonuclease active site. This interaction changes the RNA path in favor of termination (the "pre-termination" state). The type-1b and type-2 complexes have no bound DNA/RNA, likely representing the "post-termination" states. These structures illustrate the termination mechanism of eukaryotic mRNA transcription.

Structural basis of eukaryotic transcription termination by the Rat1 exonuclease complex.,Yanagisawa T, Murayama Y, Ehara H, Goto M, Aoki M, Sekine SI Nat Commun. 2024 Sep 8;15(1):7854. doi: 10.1038/s41467-024-52157-0. PMID:39245712<ref>PMID:39245712</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 8yfq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Komagataella phaffii]]
[[Category: Large Structures]]
[[Category: Ehara H]]
[[Category: Murayama Y]]
[[Category: Sekine S]]
[[Category: Yanagisawa T]]