1v3o
From Proteopedia
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- | {{Seed}} | ||
- | [[Image:1v3o.png|left|200px]] | ||
- | < | + | ==Crystal structure of d(GCGAGAGC): the DNA quadruplex structure split from the octaplex== |
- | + | <StructureSection load='1v3o' size='340' side='right'caption='[[1v3o]], [[Resolution|resolution]] 1.70Å' scene=''> | |
- | + | == Structural highlights == | |
- | + | <table><tr><td colspan='2'>[[1v3o]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1V3O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1V3O FirstGlance]. <br> | |
- | or | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7Å</td></tr> |
- | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=C38:5-IODO-2-DEOXY-CYTIDINE-5-MONOPHOSPHATE'>C38</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</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=1v3o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1v3o OCA], [https://pdbe.org/1v3o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1v3o RCSB], [https://www.ebi.ac.uk/pdbsum/1v3o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1v3o ProSAT]</span></td></tr> | |
+ | </table> | ||
+ | <div style="background-color:#fffaf0;"> | ||
+ | == Publication Abstract from PubMed == | ||
+ | Recent genomic analyses revealed many kinds of tandem repeats of specific sequences. Some of them are related to genetic diseases, but their biological functions and structures are still unknown. Two X-ray structures of a short DNA fragment d(gcGA[G]1Agc) show that four base-intercalated duplexes are assembled to form an octaplex at a low K+ concentration, in which the eight G5 residues form a stacked double G-quartet in the central part. At a higher K+ concentration, however, the octaplex is split into just two halves. These structural features suggest a folding process of eight tandem repeats of d(ccGA[G]4Agg), according to a double Greek-key motif. Such a packaging of the repeats could facilitate slippage of a certain sequence during DNA replication, to induce increase or decrease of the repeats. | ||
- | + | Crystal structures of a DNA octaplex with I-motif of G-quartets and its splitting into two quadruplexes suggest a folding mechanism of eight tandem repeats.,Kondo J, Adachi W, Umeda S, Sunami T, Takenaka A Nucleic Acids Res. 2004 May 7;32(8):2541-9. Print 2004. PMID:15133122<ref>PMID:15133122</ref> | |
- | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
- | + | </div> | |
- | + | <div class="pdbe-citations 1v3o" style="background-color:#fffaf0;"></div> | |
- | + | == References == | |
- | --> | + | <references/> |
- | + | __TOC__ | |
- | + | </StructureSection> | |
- | == | + | [[Category: Large Structures]] |
- | + | [[Category: Kondo J]] | |
- | + | [[Category: Sunami T]] | |
- | + | [[Category: Takenaka A]] | |
- | + | [[Category: Umeda S]] | |
- | [[Category: Kondo | + | |
- | [[Category: Sunami | + | |
- | [[Category: Takenaka | + | |
- | [[Category: Umeda | + | |
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Current revision
Crystal structure of d(GCGAGAGC): the DNA quadruplex structure split from the octaplex
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