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==Structure of the E. coli Pol III epsilon-Hot proofreading complex== | ==Structure of the E. coli Pol III epsilon-Hot proofreading complex== | ||
<StructureSection load='2ido' size='340' side='right' caption='[[2ido]], [[Resolution|resolution]] 2.10Å' scene=''> | <StructureSection load='2ido' size='340' side='right'caption='[[2ido]], [[Resolution|resolution]] 2.10Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2ido]] is a 4 chain structure with sequence from [ | <table><tr><td colspan='2'>[[2ido]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [https://en.wikipedia.org/wiki/Escherichia_virus_P1 Escherichia virus P1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IDO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IDO 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]] 2.1Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=TMP:THYMIDINE-5-PHOSPHATE'>TMP</scene></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=2ido FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ido OCA], [https://pdbe.org/2ido PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ido RCSB], [https://www.ebi.ac.uk/pdbsum/2ido PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ido ProSAT]</span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/DPO3E_ECOLI DPO3E_ECOLI] DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. The epsilon subunit contain the editing function and is a proofreading 3'-5' exonuclease. | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/id/2ido_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/id/2ido_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
| Line 31: | Line 31: | ||
==See Also== | ==See Also== | ||
*[[DNA polymerase|DNA polymerase]] | *[[DNA polymerase 3D structures|DNA polymerase 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Escherichia coli]] | ||
[[Category: | [[Category: Escherichia virus P1]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Chalov | [[Category: Chalov S]] | ||
[[Category: Chikova | [[Category: Chikova AK]] | ||
[[Category: DeRose | [[Category: DeRose EF]] | ||
[[Category: Harvey | [[Category: Harvey S]] | ||
[[Category: Kirby | [[Category: Kirby TW]] | ||
[[Category: London | [[Category: London RE]] | ||
[[Category: Pedersen | [[Category: Pedersen LC]] | ||
[[Category: Perrino | [[Category: Perrino FW]] | ||
[[Category: Schaaper | [[Category: Schaaper RM]] | ||
Latest revision as of 13:09, 30 August 2023
Structure of the E. coli Pol III epsilon-Hot proofreading complexStructure of the E. coli Pol III epsilon-Hot proofreading complex
Structural highlights
FunctionDPO3E_ECOLI DNA polymerase III is a complex, multichain enzyme responsible for most of the replicative synthesis in bacteria. The epsilon subunit contain the editing function and is a proofreading 3'-5' exonuclease. 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 PubMedThe epsilon subunit of Escherichia coli DNA polymerase III possesses 3'-exonucleolytic proofreading activity. Within the Pol III core, epsilon is tightly bound between the alpha subunit (DNA polymerase) and subunit. Here, we present the crystal structure of epsilon in complex with HOT, the bacteriophage P1-encoded homolog of , at 2.1 A resolution. The epsilon-HOT interface is defined by two areas of contact: an interaction of the previously unstructured N terminus of HOT with an edge of the epsilon central beta-sheet as well as interactions between HOT and the catalytically important helix alpha1-loop-helix alpha2 motif of epsilon. This structure provides insight into how HOT and, by implication, may stabilize the epsilon subunit, thus promoting efficient proofreading during chromosomal replication. Structure of the Escherichia coli DNA polymerase III epsilon-HOT proofreading complex.,Kirby TW, Harvey S, DeRose EF, Chalov S, Chikova AK, Perrino FW, Schaaper RM, London RE, Pedersen LC J Biol Chem. 2006 Dec 15;281(50):38466-71. Epub 2006 Sep 13. PMID:16973612[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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