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==Structure of a dimeric all-parallel-stranded G-quadruplex stacked via the 5'-to-5' interface==
==Structure of a dimeric all-parallel-stranded G-quadruplex stacked via the 5'-to-5' interface==
<StructureSection load='2le6' size='340' side='right' caption='[[2le6]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''>
<StructureSection load='2le6' size='340' side='right'caption='[[2le6]]' scene=''>
== Structural highlights ==
== Structural highlights ==
[[2le6]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LE6 OCA]. <br>
<table><tr><td colspan='2'>[[2le6]] is a 2 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2LE6 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2LE6 FirstGlance]. <br>
<b>[[Non-Standard_Residue|NonStd Res:]]</b> <scene name='pdbligand=DI:2-DEOXYINOSINE-5-MONOPHOSPHATE'>DI</scene><br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
<b>[[Related_structure|Related:]]</b> [[1y8d|1y8d]]<br>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2le6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2le6 OCA], [https://pdbe.org/2le6 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2le6 RCSB], [https://www.ebi.ac.uk/pdbsum/2le6 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2le6 ProSAT]</span></td></tr>
<b>Activity:</b> <span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span><br>
</table>
<b>Resources:</b> <span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2le6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2le6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2le6 RCSB], [http://www.ebi.ac.uk/pdbsum/2le6 PDBsum]</span><br>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
G-rich oligonucleotides T30695 (or T30923), with the sequence of (GGGT)(4), and T40214, with the sequence of (GGGC)(4), have been reported to exhibit anti-HIV and anticancer activity. Here we report on the structure of a dimeric G-quadruplex adopted by a derivative of these sequences in K(+) solution. It comprises two identical propeller-type parallel-stranded G-quadruplex subunits each containing three G-tetrad layers that are stacked via the 5'-5' interface. We demonstrated control over the stacking of the two monomeric subunits by sequence modifications. Our analysis of possible structures at the stacking interface provides a general principle for stacking of G-quadruplexes, which could have implications for the assembly and recognition of higher-order G-quadruplex structures.
G-rich oligonucleotides T30695 (or T30923), with the sequence of (GGGT)(4), and T40214, with the sequence of (GGGC)(4), have been reported to exhibit anti-HIV and anticancer activity. Here we report on the structure of a dimeric G-quadruplex adopted by a derivative of these sequences in K(+) solution. It comprises two identical propeller-type parallel-stranded G-quadruplex subunits each containing three G-tetrad layers that are stacked via the 5'-5' interface. We demonstrated control over the stacking of the two monomeric subunits by sequence modifications. Our analysis of possible structures at the stacking interface provides a general principle for stacking of G-quadruplexes, which could have implications for the assembly and recognition of higher-order G-quadruplex structures.
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Stacking of G-quadruplexes: NMR structure of a G-rich oligonucleotide with potential anti-HIV and anticancer activity.,Do NQ, Lim KW, Teo MH, Heddi B, Phan AT Nucleic Acids Res. 2011 Aug 12. PMID:21840903<ref>PMID:21840903</ref>
Stacking of G-quadruplexes: NMR structure of a G-rich oligonucleotide with potential anti-HIV and anticancer activity.,Do NQ, Lim KW, Teo MH, Heddi B, Phan AT Nucleic Acids Res. 2011 Aug 12. PMID:21840903<ref>PMID:21840903</ref>


From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2le6" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Do, N Q.]]
[[Category: Large Structures]]
[[Category: Heddi, B.]]
[[Category: Do NQ]]
[[Category: Lim, K W.]]
[[Category: Heddi B]]
[[Category: Phan, A T.]]
[[Category: Lim KW]]
[[Category: Teo, M H.]]
[[Category: Phan AT]]
[[Category: Anticancer]]
[[Category: Teo MH]]
[[Category: Dna]]
[[Category: G-quadruplex]]
[[Category: Hiv-1 integrase inhibition]]
[[Category: Stacking]]
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