6ray: Difference between revisions
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The | ==D. melanogaster CMG-DNA, State 2A== | ||
<SX load='6ray' size='340' side='right' viewer='molstar' caption='[[6ray]], [[Resolution|resolution]] 4.28Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6ray]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RAY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6RAY 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]] 4.28Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</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=6ray FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ray OCA], [https://pdbe.org/6ray PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ray RCSB], [https://www.ebi.ac.uk/pdbsum/6ray PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ray ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/PSF2_DROME PSF2_DROME] The GINS complex plays an essential role in the initiation of DNA replication. | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
In the eukaryotic replisome, DNA unwinding by the Cdc45-MCM-Go-Ichi-Ni-San (GINS) (CMG) helicase requires a hexameric ring-shaped ATPase named minichromosome maintenance (MCM), which spools single-stranded DNA through its central channel. Not all six ATPase sites are required for unwinding; however, the helicase mechanism is unknown. We imaged ATP-hydrolysis-driven translocation of the CMG using cryo-electron microscopy (cryo-EM) and found that the six MCM subunits engage DNA using four neighboring protomers at a time, with ATP binding promoting DNA engagement. Morphing between different helicase states leads us to suggest a non-symmetric hand-over-hand rotary mechanism, explaining the asymmetric requirements of ATPase function around the MCM ring of the CMG. By imaging of a higher-order replisome assembly, we find that the Mrc1-Csm3-Tof1 fork-stabilization complex strengthens the interaction between parental duplex DNA and the CMG at the fork, which might support the coupling between DNA translocation and fork unwinding. | |||
Molecular Basis for ATP-Hydrolysis-Driven DNA Translocation by the CMG Helicase of the Eukaryotic Replisome.,Eickhoff P, Kose HB, Martino F, Petojevic T, Abid Ali F, Locke J, Tamberg N, Nans A, Berger JM, Botchan MR, Yardimci H, Costa A Cell Rep. 2019 Sep 3;28(10):2673-2688.e8. doi: 10.1016/j.celrep.2019.07.104. PMID:31484077<ref>PMID:31484077</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
<div class="pdbe-citations 6ray" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</SX> | |||
[[Category: Drosophila melanogaster]] | |||
[[Category: Large Structures]] | |||
[[Category: Costa A]] | |||
[[Category: Eickhoff P]] | |||
[[Category: Martino F]] | |||
Latest revision as of 13:24, 23 October 2024
D. melanogaster CMG-DNA, State 2AD. melanogaster CMG-DNA, State 2A
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