View source for 5iy4


==Crystal structure of human PCNA in complex with the PIP box of DVC1==
<StructureSection load='5iy4' size='340' side='right'caption='[[5iy4]], [[Resolution|resolution]] 2.94&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5iy4]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5IY4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5IY4 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.945&#8491;</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=5iy4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5iy4 OCA], [https://pdbe.org/5iy4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5iy4 RCSB], [https://www.ebi.ac.uk/pdbsum/5iy4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5iy4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PCNA_HUMAN PCNA_HUMAN] Auxiliary protein of DNA polymerase delta and is involved in the control of eukaryotic DNA replication by increasing the polymerase's processibility during elongation of the leading strand. Induces a robust stimulatory effect on the 3'-5' exonuclease and 3'-phosphodiesterase, but not apurinic-apyrimidinic (AP) endonuclease, APEX2 activities. Has to be loaded onto DNA in order to be able to stimulate APEX2. Plays a key role in DNA damage response (DDR) by being conveniently positioned at the replication fork to coordinate DNA replication with DNA repair and DNA damage tolerance pathways. Acts as a loading platform to recruit DDR proteins that allow completion of DNA replication after DNA damage and promote postreplication repair: Monoubiquitinated PCNA leads to recruitment of translesion (TLS) polymerases, while 'Lys-63'-linked polyubiquitination of PCNA is involved in error-free pathway and employs recombination mechanisms to synthesize across the lesion.<ref>PMID:19443450</ref> <ref>PMID:18719106</ref> 
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== Publication Abstract from PubMed ==
In higher eukaryotes, DVC1 (SPRTN, Spartan or C1orf124) is implicated in the translesion synthesis (TLS) pathway. DVC1 localizes to sites of DNA damage, binds to the proliferating cell nuclear antigen (PCNA) via its conserved PCNA-interacting motif (PIP box), and associates with ubiquitin selective segregase p97 and other factors, thus regulating translesion synthesis polymerases. Here, we report the crystal structure of human PCNA in complex with a peptide ((321)SNSHQNVLSNYFPRVS(336)) derived from human DVC1 that contains a unique YF type PIP box. Structural analysis reveals the detailed PIP box-PCNA interaction. Interestingly, substitution of Y331 with Phe severely reduces its PCNA binding affinity. These findings offer new insights into the determinants of PIP box for PCNA binding.

Crystal structure of human PCNA in complex with the PIP box of DVC1.,Wang Y, Xu M, Jiang T Biochem Biophys Res Commun. 2016 May 27;474(2):264-70. doi:, 10.1016/j.bbrc.2016.04.053. Epub 2016 Apr 13. PMID:27084448<ref>PMID:27084448</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 5iy4" style="background-color:#fffaf0;"></div>

==See Also==
*[[Proliferating cell nuclear antigen 3D structures|Proliferating cell nuclear antigen 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Jiang T]]
[[Category: Wang Y]]
[[Category: Xu M]]