1u49

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{{Seed}}
 
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[[Image:1u49.png|left|200px]]
 
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==Adenine-8oxoguanine mismatch at the polymerase active site==
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The line below this paragraph, containing "STRUCTURE_1u49", creates the "Structure Box" on the page.
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<StructureSection load='1u49' size='340' side='right'caption='[[1u49]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1u49]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Geobacillus_stearothermophilus Geobacillus stearothermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U49 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1U49 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.15&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=8OG:8-OXO-2-DEOXY-GUANOSINE-5-MONOPHOSPHATE'>8OG</scene>, <scene name='pdbligand=FRU:FRUCTOSE'>FRU</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PRD_900003:sucrose'>PRD_900003</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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{{STRUCTURE_1u49| PDB=1u49 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1u49 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u49 OCA], [https://pdbe.org/1u49 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1u49 RCSB], [https://www.ebi.ac.uk/pdbsum/1u49 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1u49 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/DPO1_GEOSE DPO1_GEOSE] In addition to polymerase activity, this DNA polymerase exhibits 5' to 3' exonuclease activity.
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/u4/1u49_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1u49 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Aerobic respiration generates reactive oxygen species that can damage guanine residues and lead to the production of 8-oxoguanine (8oxoG), the major mutagenic oxidative lesion in the genome. Oxidative damage is implicated in ageing and cancer, and its prevalence presents a constant challenge to DNA polymerases that ensure accurate transmission of genomic information. When these polymerases encounter 8oxoG, they frequently catalyse misincorporation of adenine in preference to accurate incorporation of cytosine. This results in the propagation of G to T transversions, which are commonly observed somatic mutations associated with human cancers. Here, we present sequential snapshots of a high-fidelity DNA polymerase during both accurate and mutagenic replication of 8oxoG. Comparison of these crystal structures reveals that 8oxoG induces an inversion of the mismatch recognition mechanisms that normally proofread DNA, such that the 8oxoG.adenine mismatch mimics a cognate base pair whereas the 8oxoG.cytosine base pair behaves as a mismatch. These studies reveal a fundamental mechanism of error-prone replication and show how 8oxoG, and DNA lesions in general, can form mismatches that evade polymerase error-detection mechanisms, potentially leading to the stable incorporation of lethal mutations.
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===Adenine-8oxoguanine mismatch at the polymerase active site===
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Error-prone replication of oxidatively damaged DNA by a high-fidelity DNA polymerase.,Hsu GW, Ober M, Carell T, Beese LS Nature. 2004 Sep 9;431(7005):217-21. Epub 2004 Aug 22. PMID:15322558<ref>PMID:15322558</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 1u49" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_15322558}}, adds the Publication Abstract to the page
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*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 15322558 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_15322558}}
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__TOC__
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</StructureSection>
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==About this Structure==
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1U49 is a 3 chains structure of sequences from [http://en.wikipedia.org/wiki/Geobacillus_stearothermophilus Geobacillus stearothermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1U49 OCA].
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==Reference==
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<ref group="xtra">PMID:15322558</ref><references group="xtra"/>
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[[Category: DNA-directed DNA polymerase]]
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[[Category: Geobacillus stearothermophilus]]
[[Category: Geobacillus stearothermophilus]]
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[[Category: Beese, L S.]]
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[[Category: Large Structures]]
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[[Category: Carell, T.]]
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[[Category: Beese LS]]
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[[Category: Hsu, G W.]]
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[[Category: Carell T]]
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[[Category: Ober, M.]]
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[[Category: Hsu GW]]
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[[Category: 8oxoguanine]]
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[[Category: Ober M]]
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[[Category: Dna lesion]]
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[[Category: Dna polymerase i]]
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[[Category: Dna replication]]
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[[Category: Klenow fragment]]
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[[Category: Protein-dna complex]]
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[[Category: Translation replication]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Feb 18 06:58:41 2009''
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Current revision

Adenine-8oxoguanine mismatch at the polymerase active site

PDB ID 1u49

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