3e0d
From Proteopedia
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<StructureSection load='3e0d' size='340' side='right'caption='[[3e0d]], [[Resolution|resolution]] 4.60Å' scene=''> | <StructureSection load='3e0d' size='340' side='right'caption='[[3e0d]], [[Resolution|resolution]] 4.60Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[3e0d]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/ | + | <table><tr><td colspan='2'>[[3e0d]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3E0D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3E0D 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]] 4.6Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=DOC:2,3-DIDEOXYCYTIDINE-5-MONOPHOSPHATE'>DOC</scene>, <scene name='pdbligand=DTP:2-DEOXYADENOSINE+5-TRIPHOSPHATE'>DTP</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=3e0d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3e0d OCA], [https://pdbe.org/3e0d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3e0d RCSB], [https://www.ebi.ac.uk/pdbsum/3e0d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3e0d 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=3e0d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3e0d OCA], [https://pdbe.org/3e0d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3e0d RCSB], [https://www.ebi.ac.uk/pdbsum/3e0d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3e0d ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| - | + | [https://www.uniprot.org/uniprot/DPO3A_THEAQ DPO3A_THEAQ] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. This DNA polymerase also exhibits 3' to 5' exonuclease activity. The alpha chain is the DNA polymerase (By similarity). | |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</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=3e0d ConSurf]. | </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=3e0d ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | The crystal structure of the catalytic alpha-subunit of the DNA polymerase III (Pol IIIalpha) holoenzyme bound to primer-template DNA and an incoming deoxy-nucleoside 5'-triphosphate has been determined at 4.6-A resolution. The polymerase interacts with the sugar-phosphate backbone of the DNA across its minor groove, which is made possible by significant movements of the thumb, finger, and beta-binding domains relative to their orientations in the unliganded polymerase structure. Additionally, the DNA and incoming nucleotide are bound to the active site of Pol IIIalpha nearly identically as they are in their complex with DNA polymerase beta, thereby proving that the eubacterial replicating polymerase, but not the eukaryotic replicating polymerase, is homologous to DNA polymerase beta. Finally, superimposing a recent structure of the clamp bound to DNA on this Pol IIIalpha complex with DNA places a loop of the beta-binding domain into the appropriate clamp cleft and supports a mechanism of polymerase switching. | ||
| - | + | ==See Also== | |
| - | + | *[[DNA polymerase 3D structures|DNA polymerase 3D structures]] | |
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: Atcc 25104]] | ||
| - | [[Category: DNA-directed DNA polymerase]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
| - | [[Category: | + | [[Category: Thermus aquaticus]] |
| - | [[Category: | + | [[Category: Bailey S]] |
| - | [[Category: | + | [[Category: Steitz TA]] |
| - | [[Category: | + | [[Category: Wing RA]] |
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Current revision
Insights into the Replisome from the Crystral Structure of the Ternary Complex of the Eubacterial DNA Polymerase III alpha-subunit
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