2fll

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{{Seed}}
 
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[[Image:2fll.png|left|200px]]
 
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==Ternary complex of human DNA polymerase iota with DNA and dTTP==
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The line below this paragraph, containing "STRUCTURE_2fll", creates the "Structure Box" on the page.
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<StructureSection load='2fll' size='340' side='right'caption='[[2fll]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2fll]] 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=2FLL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2FLL FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 2.6&#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=DOC:2,3-DIDEOXYCYTIDINE-5-MONOPHOSPHATE'>DOC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=TTP:THYMIDINE-5-TRIPHOSPHATE'>TTP</scene></td></tr>
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{{STRUCTURE_2fll| PDB=2fll | SCENE= }}
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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=2fll FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fll OCA], [https://pdbe.org/2fll PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2fll RCSB], [https://www.ebi.ac.uk/pdbsum/2fll PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2fll 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/fl/2fll_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=2fll 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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Substrate-induced conformational change of the protein is the linchpin of enzymatic reactions. Replicative DNA polymerases, for example, convert from an open to a closed conformation in response to dNTP binding. Human DNA polymerase-iota (hPoliota), a member of the Y family of DNA polymerases, differs strikingly from other polymerases in its much higher proficiency and fidelity for nucleotide incorporation opposite template purines than opposite template pyrimidines. We present here a crystallographic analysis of hPoliota binary complexes, which together with the ternary complexes show that, contrary to replicative DNA polymerases, the DNA, and not the polymerase, undergoes the primary substrate-induced conformational change. The incoming dNTP "pushes" templates A and G from the anti to the syn conformation dictated by a rigid hPoliota active site. Together, the structures posit a mechanism for template selection wherein dNTP binding induces a conformational switch in template purines for productive Hoogsteen base pairing.
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===Ternary complex of human DNA polymerase iota with DNA and dTTP===
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An incoming nucleotide imposes an anti to syn conformational change on the templating purine in the human DNA polymerase-iota active site.,Nair DT, Johnson RE, Prakash L, Prakash S, Aggarwal AK Structure. 2006 Apr;14(4):749-55. PMID:16615915<ref>PMID:16615915</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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<div class="pdbe-citations 2fll" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_16615915}}, adds the Publication Abstract to the page
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*[[DNA polymerase 3D structures|DNA polymerase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 16615915 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_16615915}}
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__TOC__
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</StructureSection>
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==About this Structure==
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2FLL is a 3 chains structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2FLL OCA].
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==Reference==
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<ref group="xtra">PMID:16615915</ref><references group="xtra"/>
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[[Category: DNA-directed DNA polymerase]]
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Aggarwal, A K.]]
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[[Category: Large Structures]]
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[[Category: Johnson, R E.]]
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[[Category: Aggarwal AK]]
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[[Category: Nair, D T.]]
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[[Category: Johnson RE]]
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[[Category: Prakash, L.]]
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[[Category: Nair DT]]
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[[Category: Prakash, S.]]
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[[Category: Prakash L]]
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[[Category: Dna polymerase]]
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[[Category: Prakash S]]
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[[Category: Lesion bypass]]
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[[Category: P6522]]
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[[Category: Ternary complex]]
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[[Category: Y-family]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Feb 16 16:02:04 2009''
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Current revision

Ternary complex of human DNA polymerase iota with DNA and dTTP

PDB ID 2fll

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