View source for 8dk3


==CryoEM structure of Pseudomonas aeruginosa PA14 JetC ATPase domain bound to DNA and cWHD domain of JetA==
<StructureSection load='8dk3' size='340' side='right'caption='[[8dk3]], [[Resolution|resolution]] 3.28&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8dk3]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa_PA14 Pseudomonas aeruginosa PA14] 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=8DK3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8DK3 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]] 3.28&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AGS:PHOSPHOTHIOPHOSPHORIC+ACID-ADENYLATE+ESTER'>AGS</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=8dk3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8dk3 OCA], [https://pdbe.org/8dk3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8dk3 RCSB], [https://www.ebi.ac.uk/pdbsum/8dk3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8dk3 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Self versus non-self discrimination is a key element of innate and adaptive immunity across life. In bacteria, CRISPR-Cas and restriction-modification systems recognize non-self nucleic acids through their sequence and their methylation state, respectively. Here, we show that the Wadjet defense system recognizes DNA topology to protect its host against plasmid transformation. By combining cryoelectron microscopy with cross-linking mass spectrometry, we show that Wadjet forms a complex similar to the bacterial condensin complex MukBEF, with a novel nuclease subunit similar to a type II DNA topoisomerase. Wadjet specifically cleaves closed-circular DNA in a reaction requiring ATP hydrolysis by the structural maintenance of chromosome (SMC) ATPase subunit JetC, suggesting that the complex could use DNA loop extrusion to sense its substrate's topology, then specifically activate the nuclease subunit JetD to cleave plasmid DNA. Overall, our data reveal how bacteria have co-opted a DNA maintenance machine to specifically recognize and destroy foreign DNAs through topology sensing.

The SMC-family Wadjet complex protects bacteria from plasmid transformation by recognition and cleavage of closed-circular DNA.,Deep A, Gu Y, Gao YQ, Ego KM, Herzik MA Jr, Zhou H, Corbett KD Mol Cell. 2022 Nov 3;82(21):4145-4159.e7. doi: 10.1016/j.molcel.2022.09.008. Epub , 2022 Oct 6. PMID:36206765<ref>PMID:36206765</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8dk3" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pseudomonas aeruginosa PA14]]
[[Category: Synthetic construct]]
[[Category: Corbett K]]
[[Category: Deep A]]
[[Category: Ego K]]
[[Category: Gao Y]]
[[Category: Gu Y]]
[[Category: Herzik M]]
[[Category: Zhou H]]