6p5c: Difference between revisions
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==Bacillus Fragment DNA polymerase mutant I716M== | |||
<StructureSection load='6p5c' size='340' side='right'caption='[[6p5c]], [[Resolution|resolution]] 2.20Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6p5c]] is a 3 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6P5C OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6P5C FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/DNA-directed_DNA_polymerase DNA-directed DNA polymerase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.7 2.7.7.7] </span></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=6p5c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6p5c OCA], [http://pdbe.org/6p5c PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6p5c RCSB], [http://www.ebi.ac.uk/pdbsum/6p5c PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6p5c ProSAT]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
8-oxo-2'-deoxyguanosine (OdG) is a prominent DNA lesion that can direct the incorporation of dCTP or dATP during replication. As the latter reaction can lead to mutation, the ratio of dCTP/dATP incorporation can significantly affect the mutagenic potential of OdG. Previous work with the A-family polymerase BF and seven analogues of OdG identified a major groove amino acid, Ile716, which likely influences the dCTP/dATP incorporation ratio opposite OdG. To further probe the importance of this amino acid, dCTP and dATP incorporations opposite the same seven analogues were tested with two BF mutants, I716M and I716A. Results from these studies support the presence of clashing interactions between Ile716 and the C8-oxygen and C2-amine during dCTP and dATP incorporations, respectively. Crystallographic analysis suggests that residue 716 alters the conformation of the template base prior to insertion into the active site, thereby affecting enzymatic efficiency. These results are also consistent with previous work with A-family polymerases, which indicate they have tight, rigid active sites that are sensitive to template perturbations. | |||
The importance of Ile716 toward the mutagenicity of 8-Oxo-2'-deoxyguanosine with Bacillus fragment DNA polymerase.,Hamm ML, Garcia AA, Gilbert R, Johri M, Ricart M, Sholes SL, Murray-Nerger LA, Wu EY DNA Repair (Amst). 2020 Feb 20;89:102826. doi: 10.1016/j.dnarep.2020.102826. PMID:32113909<ref>PMID:32113909</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: Wu, E | <div class="pdbe-citations 6p5c" style="background-color:#fffaf0;"></div> | ||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: DNA-directed DNA polymerase]] | |||
[[Category: Large Structures]] | |||
[[Category: Wu, E Y]] | |||
[[Category: Polymerase]] | |||
[[Category: Replication]] | |||
[[Category: Replication-dna complex]] | |||
[[Category: Transferase]] |