5iij
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of the pre-catalytic ternary complex of DNA polymerase lambda with a templating 8-oxo-dG and an incoming dCTP== | |
| + | <StructureSection load='5iij' size='340' side='right' caption='[[5iij]], [[Resolution|resolution]] 1.72Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5iij]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IIJ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5IIJ FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DCT:2,3-DIDEOXYCYTIDINE+5-TRIPHOSPHATE'>DCT</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | ||
| + | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=8OG:8-OXO-2-DEOXY-GUANOSINE-5-MONOPHOSPHATE'>8OG</scene>, <scene name='pdbligand=DOC:2,3-DIDEOXYCYTIDINE-5-MONOPHOSPHATE'>DOC</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5iii|5iii]], [[5iik|5iik]], [[5iil|5iil]], [[5iim|5iim]], [[5iin|5iin]], [[5iio|5iio]]</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5iij FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5iij OCA], [http://pdbe.org/5iij PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5iij RCSB], [http://www.ebi.ac.uk/pdbsum/5iij PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5iij ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/DPOLL_HUMAN DPOLL_HUMAN]] Repair polymerase. Involved in base excision repair (BER) responsible for repair of lesions that give rise to abasic (AP) sites in DNA. Has both DNA polymerase and terminal transferase activities. Has a 5'-deoxyribose-5-phosphate lyase (dRP lyase) activity.<ref>PMID:11457865</ref> <ref>PMID:15537631</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | 8-oxo-7,8-dihydroxy-2'-deoxyguanosine (8-oxo-dG) has high mutagenic potential as it is prone to mispair with deoxyadenine (dA). In order to maintain genomic integrity, post-replicative 8-oxo-dG:dA mispairs are removed through DNA polymerase lambda (Pol lambda)-dependent MUTYH-initiated base excision repair (BER). Here, we describe seven novel crystal structures and kinetic data that fully characterize 8-oxo-dG bypass by Pol lambda. We demonstrate that Pol lambda has a flexible active site that can tolerate 8-oxo-dG in either the anti- or syn-conformation. Importantly, we show that discrimination against the pro-mutagenic syn-conformation occurs at the extension step and identify the residue responsible for this selectivity. This residue acts as a kinetic switch, shunting repair toward long-patch BER upon correct dCMP incorporation, thus enhancing repair efficiency. Moreover, this switch also provides a potential mechanism to increase repair fidelity of MUTYH-initiated BER. | ||
| - | + | A fidelity mechanism in DNA polymerase lambda promotes error-free bypass of 8-oxo-dG.,Burak MJ, Guja KE, Hambardjieva E, Derkunt B, Garcia-Diaz M EMBO J. 2016 Aug 1. pii: e201694332. PMID:27481934<ref>PMID:27481934</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 5iij" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Burak, M J]] | ||
| + | [[Category: Garcia-Diaz, M]] | ||
| + | [[Category: Guja, K E]] | ||
| + | [[Category: Transferase-dna complex]] | ||
Revision as of 00:03, 10 September 2016
Crystal structure of the pre-catalytic ternary complex of DNA polymerase lambda with a templating 8-oxo-dG and an incoming dCTP
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