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3h40

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(New page: '''Unreleased structure''' The entry 3h40 is ON HOLD until sometime in the future Authors: Jain, R., Nair, D.T., Johnson, R.E., Prakash, L., Prakash, S., Aggarwal, A. K. Description: B...)
Current revision (07:15, 6 September 2023) (edit) (undo)
 
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'''Unreleased structure'''
 
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The entry 3h40 is ON HOLD until sometime in the future
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==Binary complex of human DNA polymerase iota with template U/T==
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<StructureSection load='3h40' size='340' side='right'caption='[[3h40]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[3h40]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3H40 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3H40 FirstGlance]. <br>
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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]] 2.3&#8491;</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=BRU:5-BROMO-2-DEOXYURIDINE-5-MONOPHOSPHATE'>BRU</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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3h40 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h40 OCA], [https://pdbe.org/3h40 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3h40 RCSB], [https://www.ebi.ac.uk/pdbsum/3h40 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3h40 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/POLI_HUMAN POLI_HUMAN] Error-prone DNA polymerase specifically involved in DNA repair. Plays an important role in translesion synthesis, where the normal high-fidelity DNA polymerases cannot proceed and DNA synthesis stalls. Favors Hoogsteen base-pairing in the active site. Inserts the correct base with high-fidelity opposite an adenosine template. Exhibits low fidelity and efficiency opposite a thymidine template, where it will preferentially insert guanosine. May play a role in hypermutation of immunogobulin genes. Forms a Schiff base with 5'-deoxyribose phosphate at abasic sites, but may not have lyase activity.<ref>PMID:11013228</ref> <ref>PMID:11251121</ref> <ref>PMID:11387224</ref> <ref>PMID:12410315</ref> <ref>PMID:14630940</ref> <ref>PMID:15199127</ref> <ref>PMID:15254543</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/h4/3h40_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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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=3h40 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Human DNA polymerase-iota (Poliota) incorporates correct nucleotides opposite template purines with a much higher efficiency and fidelity than opposite template pyrimidines. In fact, the fidelity opposite template T is so poor that Poliota inserts an incorrect dGTP approximately 10 times better than it inserts the correct dATP. We determine here how a template T/U is accommodated in the Poliota active site and why a G is incorporated more efficiently than an A. We show that in the absence of incoming dATP or dGTP (binary complex), template T/U exists in both syn and anti conformations, but in the presence of dATP or dGTP (ternary complexes), template T/U is predominantly in the anti conformation. We also show that dATP and dGTP insert differently opposite template T/U, and that the basis of selection of dGTP over dATP is a hydrogen bond between the N2 amino group of dGTP and Gln59 of Poliota.
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Authors: Jain, R., Nair, D.T., Johnson, R.E., Prakash, L., Prakash, S., Aggarwal, A. K.
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Replication across template T/U by human DNA polymerase-iota.,Jain R, Nair DT, Johnson RE, Prakash L, Prakash S, Aggarwal AK Structure. 2009 Jul 15;17(7):974-80. PMID:19604477<ref>PMID:19604477</ref>
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Description: Binary structure of DNA polymerase Iota
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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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<div class="pdbe-citations 3h40" style="background-color:#fffaf0;"></div>
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Apr 30 08:47:19 2009''
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==See Also==
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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__
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</StructureSection>
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[[Category: Homo sapiens]]
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[[Category: Large Structures]]
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[[Category: Aggarwal AK]]
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[[Category: Jain R]]
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[[Category: Johnson RE]]
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[[Category: Nair DT]]
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[[Category: Prakash L]]
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[[Category: Prakash S]]

Current revision

Binary complex of human DNA polymerase iota with template U/T

PDB ID 3h40

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