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2w3o

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{{STRUCTURE_2w3o| PDB=2w3o | SCENE= }}
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==CRYSTAL STRUCTURE OF THE HUMAN PNKP FHA DOMAIN IN COMPLEX WITH AN XRCC1-DERIVED PHOSPHOPEPTIDE==
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===CRYSTAL STRUCTURE OF THE HUMAN PNKP FHA DOMAIN IN COMPLEX WITH AN XRCC1-DERIVED PHOSPHOPEPTIDE===
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<StructureSection load='2w3o' size='340' side='right' caption='[[2w3o]], [[Resolution|resolution]] 1.85&Aring;' scene=''>
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{{ABSTRACT_PUBMED_19155274}}
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2w3o]] is a 4 chain structure with sequence 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=2W3O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2W3O FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene><br>
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<tr><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=SEP:PHOSPHOSERINE'>SEP</scene>, <scene name='pdbligand=TPO:PHOSPHOTHREONINE'>TPO</scene></td></tr>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1cdz|1cdz]], [[1xnt|1xnt]], [[2brf|2brf]], [[1xna|1xna]], [[2d8m|2d8m]]</td></tr>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2w3o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2w3o OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2w3o RCSB], [http://www.ebi.ac.uk/pdbsum/2w3o PDBsum]</span></td></tr>
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<table>
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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/w3/2w3o_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/chain_selection.php?pdb_ID=2ata 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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Short-patch repair of DNA single-strand breaks and gaps (SSB) is coordinated by XRCC1, a scaffold protein that recruits the DNA polymerase and DNA ligase required for filling and sealing the damaged strand. XRCC1 can also recruit end-processing enzymes, such as PNK (polynucleotide kinase 3'-phosphatase), Aprataxin and APLF (aprataxin/PNK-like factor), which ensure the availability of a free 3'-hydroxyl on one side of the gap, and a 5'-phosphate group on the other, for the polymerase and ligase reactions respectively. PNK binds to a phosphorylated segment of XRCC1 (between its two C-terminal BRCT domains) via its Forkhead-associated (FHA) domain. We show here, contrary to previous studies, that the FHA domain of PNK binds specifically, and with high affinity to a multiply phosphorylated motif in XRCC1 containing a pSer-pThr dipeptide, and forms a 2:1 PNK:XRCC1 complex. The high-resolution crystal structure of a PNK-FHA-XRCC1 phosphopeptide complex reveals the basis for this unusual bis-phosphopeptide recognition, which is probably a common feature of the known XRCC1-associating end-processing enzymes.
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==Function==
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Specific recognition of a multiply phosphorylated motif in the DNA repair scaffold XRCC1 by the FHA domain of human PNK.,Ali AA, Jukes RM, Pearl LH, Oliver AW Nucleic Acids Res. 2009 Jan 20. PMID:19155274<ref>PMID:19155274</ref>
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[[http://www.uniprot.org/uniprot/XRCC1_HUMAN XRCC1_HUMAN]] Corrects defective DNA strand-break repair and sister chromatid exchange following treatment with ionizing radiation and alkylating agents.
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==About this Structure==
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[2w3o]] is a 4 chain structure with sequence 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=2W3O OCA].
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</div>
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:019155274</ref><references group="xtra"/><references/>
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__TOC__
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Ali, A A.E.]]
[[Category: Ali, A A.E.]]

Revision as of 02:08, 1 October 2014

CRYSTAL STRUCTURE OF THE HUMAN PNKP FHA DOMAIN IN COMPLEX WITH AN XRCC1-DERIVED PHOSPHOPEPTIDE

2w3o, resolution 1.85Å

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