View source for 8yfe


==Cryo EM structure of Komagataella phaffii Rat1-Rai1 complex==
<StructureSection load='8yfe' size='340' side='right'caption='[[8yfe]], [[Resolution|resolution]] 3.47&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8yfe]] is a 4 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=8YFE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8YFE 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]] 3.47&#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=8yfe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8yfe OCA], [https://pdbe.org/8yfe PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8yfe RCSB], [https://www.ebi.ac.uk/pdbsum/8yfe PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8yfe ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/F2QV79_KOMPC F2QV79_KOMPC] Possesses 5'->3' exoribonuclease activity. May promote termination of transcription by RNA polymerase II.[PIRNR:PIRNR037239]
<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>
</div>
<div class="pdbe-citations 8yfe" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Komagataella phaffii]]
[[Category: Large Structures]]
[[Category: Ehara H]]
[[Category: Murayama Y]]
[[Category: Sekine SI]]
[[Category: Yanagisawa T]]