View source for 7olb


==Crystal structure of Pab-AGOG, an 8-oxoguanine DNA glycosylase from Pyrococcus abyssi==
<StructureSection load='7olb' size='340' side='right'caption='[[7olb]], [[Resolution|resolution]] 1.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7olb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pyrococcus_abyssi_GE5 Pyrococcus abyssi GE5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7OLB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7OLB 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]] 1.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=7olb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7olb OCA], [https://pdbe.org/7olb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7olb RCSB], [https://www.ebi.ac.uk/pdbsum/7olb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7olb ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AGOG_PYRAB AGOG_PYRAB] DNA repair enzyme that is part of the base excision repair (BER) pathway; protects from oxidative damage by removing the major product of DNA oxidation, 8-oxoguanine (GO), from single- and double-stranded DNA substrates.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
8-Oxoguanine (GO) is a major purine oxidation product in DNA. Because of its highly mutagenic properties, GO absolutely must be eliminated from DNA. To do this, aerobic and anaerobic organisms from the three kingdoms of life have evolved repair mechanisms to prevent its deleterious effect on genetic integrity. The major way to remove GO is the base excision repair pathway, usually initiated by a GO-DNA glycosylase. First identified in bacteria (Fpg) and eukaryotes (OGG1), GO-DNA glycosylases were more recently identified in archaea (OGG2 and AGOG). AGOG is the less documented enzyme and its mode of damage recognition and removing remains to be clarified at the molecular and atomic levels. This study presents a complete structural characterisation of apo AGOGs from Pyrococcus abyssi (Pab) and Thermococcus gammatolerans (Tga) and the first structure of Pab-AGOG bound to lesion-containing single- or double-stranded DNA. By combining X-ray structure analysis, site directed mutagenesis and biochemistry experiments, we identified key amino acid residues of AGOGs responsible for the specific recognition of the lesion and the base opposite the lesion and for catalysis. Moreover, a unique binding mode of GO, involving double base flipping, never observed for any other DNA glycosylases, is revealed. In addition to unravelling the properties of AGOGs, our study, through comparative biochemical and structural analysis, offers new insights into the evolutionary plasticity of DNA glycosylases across all three kingdoms of life.

Structural and functional determinants of the archaeal 8-oxoguanine-DNA glycosylase AGOG for DNA damage recognition and processing.,Franck C, Stephane G, Julien C, Virginie G, Martine G, Norbert G, Fabrice C, Didier F, Josef SM, Bertrand C Nucleic Acids Res. 2022 Oct 28;50(19):11072-11092. doi: 10.1093/nar/gkac932. PMID:36300625<ref>PMID:36300625</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7olb" style="background-color:#fffaf0;"></div>

==See Also==
*[[DNA glycosylase 3D structures|DNA glycosylase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pyrococcus abyssi GE5]]
[[Category: Castaing B]]
[[Category: Coste F]]
[[Category: Flament D]]
[[Category: Goffinont S]]