View source for 6dwy


==Hermes transposase deletion dimer complex with (C/G) DNA and Ca2+==
<StructureSection load='6dwy' size='340' side='right'caption='[[6dwy]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6dwy]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Musca_domestica Musca domestica]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DWY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DWY FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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=6dwy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6dwy OCA], [https://pdbe.org/6dwy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6dwy RCSB], [https://www.ebi.ac.uk/pdbsum/6dwy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6dwy ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q25438_MUSDO Q25438_MUSDO] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Some DNA transposons relocate from one genomic location to another using a mechanism that involves generating double-strand breaks at their transposon ends by forming hairpins on flanking DNA. The same double-strand break mode is employed by the V(D)J recombinase at signal-end/coding-end junctions during the generation of antibody diversity. How flanking hairpins are formed during DNA transposition has remained elusive. Here, we describe several co-crystal structures of the Hermes transposase bound to DNA that mimics the reaction step immediately prior to hairpin formation. Our results reveal a large DNA conformational change between the initial cleavage step and subsequent hairpin formation that changes which strand is acted upon by a single active site. We observed that two factors affect the conformational change: the complement of divalent metal ions bound by the catalytically essential DDE residues, and the identity of the -2 flanking base pair. Our data also provides a mechanistic link between the efficiency of hairpin formation (an A:T basepair is favored at the -2 position) and Hermes' strong target site preference. Furthermore, we have established that the histidine residue within a conserved C/DxxH motif present in many transposase families interacts directly with the scissile phosphate, suggesting a crucial role in catalysis.

Structural insights into the mechanism of double strand break formation by Hermes, a hAT family eukaryotic DNA transposase.,Hickman AB, Voth AR, Ewis H, Li X, Craig NL, Dyda F Nucleic Acids Res. 2018 Nov 2;46(19):10286-10301. doi: 10.1093/nar/gky838. PMID:30239795<ref>PMID:30239795</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6dwy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Transposase 3D structures|Transposase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Musca domestica]]
[[Category: Dyda F]]
[[Category: Hickman AB]]