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[[Image:2jt7.png|left|200px]]
==NMR solution structure of the 4:1 distamycin A/[d(TGGGGT)]4 complex==
<StructureSection load='2jt7' size='340' side='right' caption='[[2jt7]], [[NMR_Ensembles_of_Models | 10 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2jt7]] is a 4 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JT7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2JT7 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DMY:DISTAMYCIN+A'>DMY</scene><br>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2jt7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jt7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2jt7 RCSB], [http://www.ebi.ac.uk/pdbsum/2jt7 PDBsum]</span></td></tr>
<table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The complex between distamycin A and the parallel DNA quadruplex [d(TGGGGT)]4 has been studied by 1H NMR spectroscopy and isothermal titration calorimetry (ITC). To unambiguously assert that distamycin A interacts with the grooves of the quadruplex [d(TGGGGT)]4, we have analyzed the NMR titration profile of a modified quadruplex, namely [d(TGGMeGGT)]4, and we have applied the recently developed differential frequency-saturation transfer difference (DF-STD) method, for assessing the ligand-DNA binding mode. The three-dimensional structure of the 4:1 distamycin A/[d(TGGGGT)]4 complex has been determined by an in-depth NMR study followed by dynamics and mechanics calculations. All results unequivocally indicate that distamycin molecules interact with [d(TGGGGT)]4 in a 4:1 binding mode, with two antiparallel distamycin dimers that bind simultaneously two opposite grooves of the quadruplex. The affinity between distamycin A and [d(TGGGGT)]4 enhances ( approximately 10-fold) when the ratio of distamycin A to the quadruplex is increased. In this paper we report the first three-dimensional structure of a groove-binder molecule complexed to a DNA quadruplex structure.


{{STRUCTURE_2jt7|  PDB=2jt7  |  SCENE=  }}
Structural and thermodynamic studies of the interaction of distamycin A with the parallel quadruplex structure [d(TGGGGT)]4.,Martino L, Virno A, Pagano B, Virgilio A, Di Micco S, Galeone A, Giancola C, Bifulco G, Mayol L, Randazzo A J Am Chem Soc. 2007 Dec 26;129(51):16048-56. Epub 2007 Dec 4. PMID:18052170<ref>PMID:18052170</ref>


===NMR solution structure of the 4:1 distamycin A/[d(TGGGGT)]4 complex===
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
{{ABSTRACT_PUBMED_18052170}}
== References ==
 
<references/>
==About this Structure==
__TOC__
[[2jt7]] is a 4 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JT7 OCA].
</StructureSection>
 
==Reference==
<ref group="xtra">PMID:018052170</ref><references group="xtra"/>
[[Category: Martino, L.]]
[[Category: Martino, L.]]
[[Category: Virno, A.]]
[[Category: Virno, A.]]
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