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==Crystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMP== | ==Crystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMP== | ||
<StructureSection load='3spl' size='340' side='right' caption='[[3spl]], [[Resolution|resolution]] 2.10Å' scene=''> | <StructureSection load='3spl' size='340' side='right'caption='[[3spl]], [[Resolution|resolution]] 2.10Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3spl]] is a 8 chain structure with sequence from [ | <table><tr><td colspan='2'>[[3spl]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Fission_yeast Fission yeast]. 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='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><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> | </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='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3sp4|3sp4]], [[3spd|3spd]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3sp4|3sp4]], [[3spd|3spd]]</div></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">hnt3, SPCC18.09c ([ | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">hnt3, SPCC18.09c ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=284812 Fission yeast])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <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> | </table> | ||
== Function == | == 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;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 25: | Line 25: | ||
</StructureSection> | </StructureSection> | ||
[[Category: Fission yeast]] | [[Category: Fission yeast]] | ||
[[Category: Large Structures]] | |||
[[Category: Ding, J]] | [[Category: Ding, J]] | ||
[[Category: Dou, C]] | [[Category: Dou, C]] | ||
Revision as of 11:05, 29 June 2022
Crystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMPCrystal structure of aprataxin ortholog Hnt3 in complex with DNA and AMP
Structural highlights
Function[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). Publication Abstract from PubMedAprataxin 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. 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[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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