3tap
From Proteopedia
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3tap]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Geobacillus Geobacillus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TAP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TAP FirstGlance]. <br> | <table><tr><td colspan='2'>[[3tap]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Geobacillus Geobacillus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TAP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3TAP FirstGlance]. <br> | ||
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.655Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3tap FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tap OCA], [https://pdbe.org/3tap PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3tap RCSB], [https://www.ebi.ac.uk/pdbsum/3tap PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3tap ProSAT]</span></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=3tap FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tap OCA], [https://pdbe.org/3tap PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3tap RCSB], [https://www.ebi.ac.uk/pdbsum/3tap PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3tap ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | Even though high-fidelity polymerases copy DNA with remarkable accuracy, some base-pair mismatches are incorporated at low frequency, leading to spontaneous mutagenesis. Using high-resolution X-ray crystallographic analysis of a DNA polymerase that catalyzes replication in crystals, we observe that a C*A mismatch can mimic the shape of cognate base pairs at the site of incorporation. This shape mimicry enables the mismatch to evade the error detection mechanisms of the polymerase, which would normally either prevent mismatch incorporation or promote its nucleolytic excision. Movement of a single proton on one of the mismatched bases alters the hydrogen-bonding pattern such that a base pair forms with an overall shape that is virtually indistinguishable from a canonical, Watson-Crick base pair in double-stranded DNA. These observations provide structural evidence for the rare tautomer hypothesis of spontaneous mutagenesis, a long-standing concept that has been difficult to demonstrate directly. | ||
| - | + | ==See Also== | |
| - | + | *[[DNA polymerase 3D structures|DNA polymerase 3D structures]] | |
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: DNA-directed DNA polymerase]] | ||
[[Category: Geobacillus]] | [[Category: Geobacillus]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: Beese | + | [[Category: Beese LS]] |
| - | [[Category: Wang | + | [[Category: Wang W]] |
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Current revision
Crystal Structure of Bacillus DNA Polymerase I Large Fragment Bound to Duplex DNA with Cytosine-Adenine Mismatch at (n-3) Position
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