View source for 7tjk


==S. cerevisiae ORC bound to 84 bp ARS1 DNA and Cdc6 (state 2) with docked Orc6 N-terminal domain==
<StructureSection load='7tjk' size='340' side='right'caption='[[7tjk]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7tjk]] is a 9 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7TJK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7TJK FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=7tjk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7tjk OCA], [https://pdbe.org/7tjk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7tjk RCSB], [https://www.ebi.ac.uk/pdbsum/7tjk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7tjk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ORC1_YEAST ORC1_YEAST] Component of the origin recognition complex (ORC) that binds origins of replication. It has a role in both chromosomal replication and mating type transcriptional silencing. Binds to the ARS consensus sequence (ACS) of origins of replication.<ref>PMID:17825064</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The coordinated action of multiple replicative helicase loading factors is needed for the licensing of replication origins prior to DNA replication. Binding of the Origin Recognition Complex (ORC) to DNA initiates the ATP-dependent recruitment of Cdc6, Cdt1 and Mcm2-7 loading, but the structural details for timely ATPase site regulation and for how loading can be impeded by inhibitory signals, such as cyclin-dependent kinase phosphorylation, are unknown. Using cryo-electron microscopy, we have determined several structures of S. cerevisiae ORC.DNA.Cdc6 intermediates at 2.5-2.7 A resolution. These structures reveal distinct ring conformations of the initiator.co-loader assembly and inactive ATPase site configurations for ORC and Cdc6. The Orc6 N-terminal domain laterally engages the ORC.Cdc6 ring in a manner that is incompatible with productive Mcm2-7 docking, while deletion of this Orc6 region alleviates the CDK-mediated inhibition of Mcm7 recruitment. Our findings support a model in which Orc6 promotes the assembly of an autoinhibited ORC.DNA.Cdc6 intermediate to block origin licensing in response to CDK phosphorylation and to avert DNA re-replication.

,  PMID:35217664<ref>PMID:35217664</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7tjk" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Bleichert F]]
[[Category: Hunker O]]
[[Category: Kumar A]]
[[Category: Schmidt JM]]
[[Category: Yang R]]