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4dsf

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==Ternary complex of Bacillus DNA Polymerase I Large Fragment F710Y, DNA duplex, and rCTP (paired with dG of template) in presence of Mn2+==
==Ternary complex of Bacillus DNA Polymerase I Large Fragment F710Y, DNA duplex, and rCTP (paired with dG of template) in presence of Mn2+==
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<StructureSection load='4dsf' size='340' side='right' caption='[[4dsf]], [[Resolution|resolution]] 1.66&Aring;' scene=''>
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<StructureSection load='4dsf' size='340' side='right'caption='[[4dsf]], [[Resolution|resolution]] 1.66&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4dsf]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Geobacillus_kaustophilus_hta426 Geobacillus kaustophilus hta426]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DSF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4DSF FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4dsf]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Geobacillus_kaustophilus_HTA426 Geobacillus kaustophilus HTA426]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DSF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4DSF FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CTP:CYTIDINE-5-TRIPHOSPHATE'>CTP</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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]] 1.661&#8491;</td></tr>
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<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DOC:2,3-DIDEOXYCYTIDINE-5-MONOPHOSPHATE'>DOC</scene></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=CTP:CYTIDINE-5-TRIPHOSPHATE'>CTP</scene>, <scene name='pdbligand=DOC:2,3-DIDEOXYCYTIDINE-5-MONOPHOSPHATE'>DOC</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ds4|4ds4]], [[4ds5|4ds5]], [[4dse|4dse]]</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=4dsf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dsf OCA], [https://pdbe.org/4dsf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4dsf RCSB], [https://www.ebi.ac.uk/pdbsum/4dsf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4dsf ProSAT]</span></td></tr>
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<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">polA, GK2730 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=235909 Geobacillus kaustophilus HTA426])</td></tr>
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<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>
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<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=4dsf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4dsf OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4dsf RCSB], [http://www.ebi.ac.uk/pdbsum/4dsf PDBsum]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/Q5KWC1_GEOKA Q5KWC1_GEOKA]
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In addition to discriminating against base-pair mismatches, DNA polymerases exhibit a high degree of selectivity for deoxyribonucleotides over ribo- or dideoxy nucleotides. It has been proposed that a single active site residue (steric gate) blocks productive binding of nucleotides containing 2' hydroxyls. Although this steric gate plays a role in sugar moiety discrimination, its interactions do not account fully for the observed behavior of mutants. Here we present ten high-resolution crystal structures and enzyme kinetic analyses of Bacillus DNA polymerase I large fragment (BF) variants complexed with deoxy-, ribo-, dideoxy-nucleotides, and a DNA substrate. Taken together, these data present a more nuanced and general mechanism for nucleotide discrimination in which ensembles of intermediate conformations in the active site trap non-cognate substrates. It is known that the active site O-helix transitions from an open state in the absence of nucleotide substrates to a ternary complex closed state in which the reactive groups are aligned for catalysis. Substrate misalignment in the closed state plays a fundamental part in preventing non-cognate nucleotide misincorpation. The structures presented here show that additional O-helix conformations intermediate between the open and closed state extremes create an ensemble of binding sites that trap and misalign non-cognate nucleotides. Water-mediated interactions, absent in the fully closed state, play an important role in formation of these binding sites, and can be remodeled to accommodate different non-cognate substrates. This mechanism may extend also to base-pair discrimination.
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Structural factors that determine selectivity of a high-fidelity DNA polymerase for deoxy-, dideoxy-, and ribo-nucleotides.,Wang W, Wu EY, Hellinga HW, Beese LS J Biol Chem. 2012 May 30. PMID:22648417<ref>PMID:22648417</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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==See Also==
==See Also==
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*[[DNA polymerase|DNA polymerase]]
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*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: DNA-directed DNA polymerase]]
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[[Category: Geobacillus kaustophilus HTA426]]
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[[Category: Geobacillus kaustophilus hta426]]
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[[Category: Large Structures]]
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[[Category: Beese, L S]]
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[[Category: Beese LS]]
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[[Category: Wang, W]]
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[[Category: Wang W]]
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[[Category: Dna polymerase i]]
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[[Category: Transferase-dna complex]]
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Current revision

Ternary complex of Bacillus DNA Polymerase I Large Fragment F710Y, DNA duplex, and rCTP (paired with dG of template) in presence of Mn2+

PDB ID 4dsf

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