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4xhu

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'''Unreleased structure'''
 
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The entry 4xhu is ON HOLD
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==The complex structure of Timeless_PAB and PARP-1_catalytic domain==
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<StructureSection load='4xhu' size='340' side='right'caption='[[4xhu]], [[Resolution|resolution]] 2.09&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[4xhu]] is a 4 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=4XHU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4XHU 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]] 2.089&#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=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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=4xhu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xhu OCA], [https://pdbe.org/4xhu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4xhu RCSB], [https://www.ebi.ac.uk/pdbsum/4xhu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4xhu ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PARP1_HUMAN PARP1_HUMAN] Involved in the base excision repair (BER) pathway, by catalyzing the poly(ADP-ribosyl)ation of a limited number of acceptor proteins involved in chromatin architecture and in DNA metabolism. This modification follows DNA damages and appears as an obligatory step in a detection/signaling pathway leading to the reparation of DNA strand breaks. Mediates the poly(ADP-ribosyl)ation of APLF and CHFR. Positively regulates the transcription of MTUS1 and negatively regulates the transcription of MTUS2/TIP150. With EEF1A1 and TXK, forms a complex that acts as a T-helper 1 (Th1) cell-specific transcription factor and binds the promoter of IFN-gamma to directly regulate its transcription, and is thus involved importantly in Th1 cytokine production.<ref>PMID:17177976</ref> <ref>PMID:18172500</ref> <ref>PMID:19344625</ref> <ref>PMID:19661379</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Human Timeless helps stabilize replication forks during normal DNA replication and plays a critical role in activation of the S phase checkpoint and proper establishment of sister chromatid cohesion. However, it remains elusive whether Timeless is involved in the repair of damaged DNA. Here, we identify that Timeless physically interacts with PARP-1 independent of poly(ADP-ribosyl)ation. We present high-resolution crystal structures of Timeless PAB (PARP-1-binding domain) in free form and in complex with PARP-1 catalytic domain. Interestingly, Timeless PAB domain specifically recognizes PARP-1, but not PARP-2 or PARP-3. Timeless-PARP-1 interaction does not interfere with PARP-1 enzymatic activity. We demonstrate that rapid and transient accumulation of Timeless at laser-induced DNA damage sites requires PARP-1, but not poly(ADP-ribosyl)ation and that Timeless is co-trapped with PARP-1 at DNA lesions upon PARP inhibition. Furthermore, we show that Timeless and PARP-1 interaction is required for efficient homologous recombination repair.
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Authors: Xie, S, Qian, C
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Timeless Interacts with PARP-1 to Promote Homologous Recombination Repair.,Xie S, Mortusewicz O, Ma HT, Herr P, Poon RR, Helleday T, Qian C Mol Cell. 2015 Sep 2. pii: S1097-2765(15)00589-4. doi:, 10.1016/j.molcel.2015.07.031. PMID:26344098<ref>PMID:26344098</ref>
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Description: Complex Structure of Timeless and PARP-1
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Unreleased Structures]]
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</div>
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[[Category: Xie, S, Qian, C]]
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<div class="pdbe-citations 4xhu" style="background-color:#fffaf0;"></div>
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==See Also==
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*[[Poly(ADP-ribose) polymerase 3D structures|Poly(ADP-ribose) 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: Qian C]]
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[[Category: Xie S]]

Current revision

The complex structure of Timeless_PAB and PARP-1_catalytic domain

PDB ID 4xhu

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