4n9j

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[4n9j]] is a 2 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=4N9J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4N9J FirstGlance]. <br>
<table><tr><td colspan='2'>[[4n9j]] is a 2 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=4N9J OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4N9J FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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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]] 2.601&#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=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=4n9j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4n9j OCA], [https://pdbe.org/4n9j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4n9j RCSB], [https://www.ebi.ac.uk/pdbsum/4n9j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4n9j ProSAT]</span></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=4n9j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4n9j OCA], [https://pdbe.org/4n9j PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4n9j RCSB], [https://www.ebi.ac.uk/pdbsum/4n9j PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4n9j ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[https://www.uniprot.org/uniprot/PLK4_HUMAN PLK4_HUMAN] Serine/threonine-protein kinase that plays a central role in centriole duplication. Able to trigger procentriole formation on the surface of the parental centriole cylinder, leading to the recruitment of centriole biogenesis proteins such as SASS6, CENPJ/CPAP, CCP110, CEP135 and gamma-tubulin. When overexpressed, it is able to induce centrosome amplification through the simultaneous generation of multiple procentrioles adjoining each parental centriole during S phase. Phosphorylates 'Ser-151' of FBXW5 during the G1/S transition, leading to inhibit FBXW5 ability to ubiquitinate SASS6. Its central role in centriole replication suggests a possible role in tumorigenesis, centrosome aberrations being frequently observed in tumors. Also involved in trophoblast differentiation by phosphorylating HAND1, leading to disrupt the interaction between HAND1 and MDFIC and activate HAND1. Phosphorylates CDC25C and CHEK2.<ref>PMID:16326102</ref> <ref>PMID:16244668</ref> <ref>PMID:17681131</ref> <ref>PMID:18239451</ref> <ref>PMID:19164942</ref> <ref>PMID:21725316</ref>
[https://www.uniprot.org/uniprot/PLK4_HUMAN PLK4_HUMAN] Serine/threonine-protein kinase that plays a central role in centriole duplication. Able to trigger procentriole formation on the surface of the parental centriole cylinder, leading to the recruitment of centriole biogenesis proteins such as SASS6, CENPJ/CPAP, CCP110, CEP135 and gamma-tubulin. When overexpressed, it is able to induce centrosome amplification through the simultaneous generation of multiple procentrioles adjoining each parental centriole during S phase. Phosphorylates 'Ser-151' of FBXW5 during the G1/S transition, leading to inhibit FBXW5 ability to ubiquitinate SASS6. Its central role in centriole replication suggests a possible role in tumorigenesis, centrosome aberrations being frequently observed in tumors. Also involved in trophoblast differentiation by phosphorylating HAND1, leading to disrupt the interaction between HAND1 and MDFIC and activate HAND1. Phosphorylates CDC25C and CHEK2.<ref>PMID:16326102</ref> <ref>PMID:16244668</ref> <ref>PMID:17681131</ref> <ref>PMID:18239451</ref> <ref>PMID:19164942</ref> <ref>PMID:21725316</ref>
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<div style="background-color:#fffaf0;">
 
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== Publication Abstract from PubMed ==
 
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Polo-like kinase 4 (Plk4) is a key regulator of centriole duplication, an event critical for the maintenance of genomic integrity. We show that Plk4 relocalizes from the inner Cep192 ring to the outer Cep152 ring as newly recruited Cep152 assembles around the Cep192-encircled daughter centriole. Crystal-structure analyses revealed that Cep192- and Cep152-derived peptides bind the cryptic polo box (CPB) of Plk4 in opposite orientations and in a mutually exclusive manner. The Cep152 peptide bound to the CPB markedly better than did the Cep192 peptide and effectively 'snatched' the CPB away from a preformed CPB-Cep192 peptide complex. A cancer-associated Cep152 mutation impairing the Plk4 interaction induced defects in procentriole assembly and chromosome segregation. Thus, Plk4 is intricately regulated in time and space through ordered interactions with two distinct scaffolds, Cep192 and Cep152, and a failure in this process may lead to human cancer.
 
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Molecular basis for unidirectional scaffold switching of human Plk4 in centriole biogenesis.,Park SY, Park JE, Kim TS, Kim JH, Kwak MJ, Ku B, Tian L, Murugan RN, Ahn M, Komiya S, Hojo H, Kim NH, Kim BY, Bang JK, Erikson RL, Lee KW, Kim SJ, Oh BH, Yang W, Lee KS Nat Struct Mol Biol. 2014 Jun 29. doi: 10.1038/nsmb.2846. PMID:24997597<ref>PMID:24997597</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 4n9j" style="background-color:#fffaf0;"></div>
 
==See Also==
==See Also==

Current revision

Crystal structure of the cryptic polo box domain of human Plk4

PDB ID 4n9j

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Proteopedia Page Contributors and Editors (what is this?)

OCA

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