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2qxf
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==Product bound structure of exonuclease I at 1.5 angstrom resolution== | ==Product bound structure of exonuclease I at 1.5 angstrom resolution== | ||
| - | <StructureSection load='2qxf' size='340' side='right' caption='[[2qxf]], [[Resolution|resolution]] 1.50Å' scene=''> | + | <StructureSection load='2qxf' size='340' side='right'caption='[[2qxf]], [[Resolution|resolution]] 1.50Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[2qxf]] is a 1 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[2qxf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2QXF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2QXF 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]] 1.5Å</td></tr> |
| - | <tr id=' | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</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=2qxf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2qxf OCA], [https://pdbe.org/2qxf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2qxf RCSB], [https://www.ebi.ac.uk/pdbsum/2qxf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2qxf 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/EX1_ECOLI EX1_ECOLI] Also functions as a DNA deoxyribophosphodiesterase that releases deoxyribose-phosphate moieties following the cleavage DNA at an apurinic/apyrimidinic (AP) site by either an AP endonuclease AP lyase. |
== 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/qx/2qxf_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/qx/2qxf_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> | ||
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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=2qxf 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=2qxf ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | In Escherichia coli, exonuclease I (ExoI) is a monomeric processive 3'-5' exonuclease that degrades single-stranded DNA. The enzyme has been implicated as primarily being involved in repairing frameshift mutations. The structure of the enzyme has previously been determined in a hexagonal space group at 2.4 A resolution. Here, the structure of ExoI in complex with a nucleotide product, thymidine 5'-monophosphate, is described in an orthorhombic space group at 1.5 A resolution. This new high-resolution structure provides some insight into the interactions involved in binding a nucleotide product. The conserved active site contains a unique metal-binding position when compared with orthologous sites in the Klenow fragment, T4 DNA polymerase and dnaQ. This unique difference is proposed to be a consequence of the repositioning of an important histidine, His181, away from the active site. | ||
| - | + | ==See Also== | |
| - | + | *[[Exonuclease 3D structures|Exonuclease 3D structures]] | |
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
| - | [[Category: | + | [[Category: Escherichia coli K-12]] |
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Busam | + | [[Category: Busam RD]] |
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Current revision
Product bound structure of exonuclease I at 1.5 angstrom resolution
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