3c2m: Difference between revisions
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[[Image: | ==Ternary complex of DNA POLYMERASE BETA with a G:dAPCPP mismatch in the active site== | ||
<StructureSection load='3c2m' size='340' side='right' caption='[[3c2m]], [[Resolution|resolution]] 2.15Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3c2m]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3C2M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3C2M FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=F2A:2-DEOXY-5-O-[(S)-HYDROXY{[(S)-HYDROXY(PHOSPHONOOXY)PHOSPHORYL]METHYL}PHOSPHORYL]ADENOSINE'>F2A</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene><br> | |||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fmp|2fmp]], [[3c2k|3c2k]], [[3c2l|3c2l]]</td></tr> | |||
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">POLB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr> | |||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3c2m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3c2m OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3c2m RCSB], [http://www.ebi.ac.uk/pdbsum/3c2m PDBsum]</span></td></tr> | |||
<table> | |||
== 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/c2/3c2m_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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/chain_selection.php?pdb_ID=2ata ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
We report the crystallographic structures of DNA polymerase beta with dG-dAMPCPP and dC-dAMPCPP mismatches in the active site. These premutagenic structures were obtained with a nonhydrolyzable incoming nucleotide analog, dAMPCPP, and Mn(2+). Substituting Mn(2+) for Mg(2+) significantly decreases the fidelity of DNA synthesis. The structures reveal that the enzyme is in a closed conformation like that observed with a matched Watson-Crick base pair. The incorrect dAMPCPP binds in a conformation identical to that observed with the correct nucleotide. To accommodate the incorrect nucleotide and closed protein conformation, the template strand in the vicinity of the active site has shifted upstream over 3 A, removing the coding base from the active site and generating an abasic templating pocket. The primer terminus rotates as its complementary template base is repositioned. This rotation moves O3' of the primer terminus away from the alpha-phosphate of the incoming nucleotide, thereby deterring misincorporation. | |||
Structures of DNA polymerase beta with active-site mismatches suggest a transient abasic site intermediate during misincorporation.,Batra VK, Beard WA, Shock DD, Pedersen LC, Wilson SH Mol Cell. 2008 May 9;30(3):315-24. PMID:18471977<ref>PMID:18471977</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[DNA polymerase|DNA polymerase]] | *[[DNA polymerase|DNA polymerase]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Batra, V K.]] | [[Category: Batra, V K.]] | ||
Revision as of 12:12, 29 September 2014
Ternary complex of DNA POLYMERASE BETA with a G:dAPCPP mismatch in the active siteTernary complex of DNA POLYMERASE BETA with a G:dAPCPP mismatch in the active site
Structural highlights
Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedWe report the crystallographic structures of DNA polymerase beta with dG-dAMPCPP and dC-dAMPCPP mismatches in the active site. These premutagenic structures were obtained with a nonhydrolyzable incoming nucleotide analog, dAMPCPP, and Mn(2+). Substituting Mn(2+) for Mg(2+) significantly decreases the fidelity of DNA synthesis. The structures reveal that the enzyme is in a closed conformation like that observed with a matched Watson-Crick base pair. The incorrect dAMPCPP binds in a conformation identical to that observed with the correct nucleotide. To accommodate the incorrect nucleotide and closed protein conformation, the template strand in the vicinity of the active site has shifted upstream over 3 A, removing the coding base from the active site and generating an abasic templating pocket. The primer terminus rotates as its complementary template base is repositioned. This rotation moves O3' of the primer terminus away from the alpha-phosphate of the incoming nucleotide, thereby deterring misincorporation. Structures of DNA polymerase beta with active-site mismatches suggest a transient abasic site intermediate during misincorporation.,Batra VK, Beard WA, Shock DD, Pedersen LC, Wilson SH Mol Cell. 2008 May 9;30(3):315-24. PMID:18471977[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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