9n6b
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Structure of the retron IA complex with HNH nuclease in the "up" orientation== | |
| + | <StructureSection load='9n6b' size='340' side='right'caption='[[9n6b]], [[Resolution|resolution]] 3.09Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[9n6b]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9N6B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9N6B 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]] 3.09Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</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=9n6b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9n6b OCA], [https://pdbe.org/9n6b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9n6b RCSB], [https://www.ebi.ac.uk/pdbsum/9n6b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9n6b ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/A0AAD2V6K7_ECOLX A0AAD2V6K7_ECOLX] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Reverse transcriptases (RTs) have well-established roles in the replication and spread of retroviruses and retrotransposons. However, recent evidence suggests that RTs have been conscripted by cells for diverse roles in antiviral defense. Here we determine structures of a type I-A retron, which explain how RNA, DNA, RT, HNH-nuclease and four molecules of an SMC-family ATPase assemble into a 364 kDa complex that provides phage defense. We show that phage-encoded nucleases trigger degradation of the retron-associated DNA, leading to disassembly of the retron and activation of the HNH nuclease. The HNH nuclease cleaves tRNA (Ser) , stalling protein synthesis and arresting viral replication. Taken together, these data reveal diverse and paradoxical roles for RTs in the perpetuation and elimination of genetic parasites. | ||
| - | + | Structural basis of antiphage defense by an ATPase-associated reverse transcriptase.,George JT, Burman N, Wilkinson RA, de Silva S, McKelvey-Pham Q, Buyukyoruk M, Dale A, Landman H, Graham A, DeLuca SZ, Wiedenheft B bioRxiv [Preprint]. 2025 Mar 26:2025.03.26.645336. doi: , 10.1101/2025.03.26.645336. PMID:40196496<ref>PMID:40196496</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 9n6b" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Escherichia coli]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Burman N]] | ||
| + | [[Category: Thomas-George J]] | ||
| + | [[Category: Wiedenheft B]] | ||
| + | [[Category: Wilkinson R]] | ||
Current revision
Structure of the retron IA complex with HNH nuclease in the "up" orientation
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