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{{STRUCTURE_3spl|  PDB=3spl  |  SCENE=  }}
===Crystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMP===
{{ABSTRACT_PUBMED_21984208}}


==Function==
==Crystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMP==
[[http://www.uniprot.org/uniprot/APTX_SCHPO APTX_SCHPO]] DNA-binding protein involved in single-strand DNA break repair, double-strand DNA break repair and base excision repair. Resolves abortive DNA ligation intermediates formed either at base excision sites, or when DNA ligases attempt to repair non-ligatable breaks induced by reactive oxygen species. Catalyzes the release of adenylate groups covalently linked to 5'-phosphate termini, resulting in the production of 5'-phosphate termini that can be efficiently rejoined (By similarity).  
<StructureSection load='3spl' size='340' side='right'caption='[[3spl]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3spl]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Schizosaccharomyces_pombe_972h- Schizosaccharomyces pombe 972h-]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SPL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3SPL 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]] 2.101&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=3spl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3spl OCA], [https://pdbe.org/3spl PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3spl RCSB], [https://www.ebi.ac.uk/pdbsum/3spl PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3spl ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/APTX_SCHPO APTX_SCHPO] DNA-binding protein involved in single-strand DNA break repair, double-strand DNA break repair and base excision repair. Resolves abortive DNA ligation intermediates formed either at base excision sites, or when DNA ligases attempt to repair non-ligatable breaks induced by reactive oxygen species. Catalyzes the release of adenylate groups covalently linked to 5'-phosphate termini, resulting in the production of 5'-phosphate termini that can be efficiently rejoined (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Aprataxin is a DNA deadenylase that resolves DNA 5'-AMP termini and reverses abortive DNA ligation. The crystal structures of Schizosaccharomyces pombe aprataxin Hnt3 in its apo form and in complex to dsDNA and dsDNA-AMP reveal how Hnt3 recognizes and processes 5'-adenylated DNA in a structure-specific manner. The bound DNA adopts a 5'-flap conformation that facilitates 5'-AMP access to the active site, where AMP cleavage occurs by a canonical catalytic mechanism.


==About this Structure==
Crystal structures of aprataxin ortholog Hnt3 reveal the mechanism for reversal of 5'-adenylated DNA.,Gong Y, Zhu D, Ding J, Dou CN, Ren X, Gu L, Jiang T, Wang DC Nat Struct Mol Biol. 2011 Oct 9;18(11):1297-9. doi: 10.1038/nsmb.2145. PMID:21984208<ref>PMID:21984208</ref>
[[3spl]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Schizosaccharomyces_pombe_972h- Schizosaccharomyces pombe 972h-]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3SPL OCA].


==Reference==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
<ref group="xtra">PMID:021984208</ref><references group="xtra"/><references/>
</div>
<div class="pdbe-citations 3spl" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Schizosaccharomyces pombe 972h-]]
[[Category: Schizosaccharomyces pombe 972h-]]
[[Category: Ding, J.]]
[[Category: Ding J]]
[[Category: Dou, C.]]
[[Category: Dou C]]
[[Category: Gong, Y.]]
[[Category: Gong Y]]
[[Category: Jiang, T.]]
[[Category: Jiang T]]
[[Category: Ren, X.]]
[[Category: Ren X]]
[[Category: Wang, D.]]
[[Category: Wang D]]
[[Category: Zhu, D.]]
[[Category: Zhu D]]
[[Category: Amp binding]]
[[Category: Dna binding]]
[[Category: Dna deadenylase]]
[[Category: Hit domain]]
[[Category: Hydrolase-dna complex]]
[[Category: Zinc finger]]
Retrieved from "https://proteopedia.org/3spl"