View source for 1wn7


==Crystal structure of archaeal family B DNA polymerase mutant==
<StructureSection load='1wn7' size='340' side='right'caption='[[1wn7]], [[Resolution|resolution]] 2.75&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1wn7]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermococcus_kodakarensis_KOD1 Thermococcus kodakarensis KOD1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WN7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WN7 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]] 2.75&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</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=1wn7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wn7 OCA], [https://pdbe.org/1wn7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1wn7 RCSB], [https://www.ebi.ac.uk/pdbsum/1wn7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1wn7 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/D0VWU9_THEKO D0VWU9_THEKO] 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wn/1wn7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1wn7 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
A novel mechanism for controlling the proofreading and polymerase activities of archaeal DNA polymerases was studied. The 3'-5'exonuclease (proofreading) activity and PCR performance of the family B DNA polymerase from Thermococcus kodakaraensis KOD1 (previously Pyrococcus kodakaraensis KOD1) were altered efficiently by mutation of a "unique loop" in the exonuclease domain. Interestingly, eight different H147 mutants showed considerable variations in respect to their 3'-5'exonuclease activity, from 9% to 276%, as against that of the wild-type (WT) enzyme. We determined the 2.75A crystal structure of the H147E mutant of KOD DNA polymerase that shows 30% of the 3'-5'exonuclease activity, excellent PCR performance and WT-like fidelity. The structural data indicate that the properties of the H147E mutant were altered by a conformational change of the Editing-cleft caused by an interaction between the unique loop and the Thumb domain. Our data suggest that electrostatic and hydrophobic interactions between the unique loop of the exonuclease domain and the tip of the Thumb domain are essential for determining the properties of these DNA polymerases.

Structural mechanism for coordination of proofreading and polymerase activities in archaeal DNA polymerases.,Kuroita T, Matsumura H, Yokota N, Kitabayashi M, Hashimoto H, Inoue T, Imanaka T, Kai Y J Mol Biol. 2005 Aug 12;351(2):291-8. PMID:16019029<ref>PMID:16019029</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 1wn7" style="background-color:#fffaf0;"></div>

==See Also==
*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermococcus kodakarensis KOD1]]
[[Category: Hashimoto H]]
[[Category: Imanaka T]]
[[Category: Inoue T]]
[[Category: Kai Y]]
[[Category: Kuroita T]]
[[Category: Matsumura H]]
[[Category: Yokota N]]