264d

<StructureSection load='264d' size='340' side='right' caption='[[264d]], [[Resolution|resolution]] 2.44&Aring;' scene=''>

<table><tr><td colspan='2'>[[264d]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=264D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=264D FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HT:2-(4-HYDROXYPHENYL)-5-(4-METHYL-1-PIPERAZINYL)-2,5-BI-BENZIMIDAZOLE'>HT</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=264d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=264d OCA], [http://pdbe.org/264d PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=264d RCSB], [http://www.ebi.ac.uk/pdbsum/264d PDBsum]</span></td></tr>

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== Publication Abstract from PubMed ==

The molecular structure of the DNA A-tract dodecamer d(CGCAAATTTGCG) complexed with the drug Hoechst 33258 has been determined by X-ray diffraction analysis. The Hoechst molecule binds in the DNA minor groove covering the sequence AATTT of the central A-tract, with the piperazine group close to one of the GC regions. The drug molecule makes two three-centered hydrogen bonds from the nitrogen atoms of the benzimidazole rings to the N3 and O2 atoms of the DNA bases. Although a high propeller twist is observed in the A-tract, only one unsymmetrical three-centered hydrogen bond is present in the DNA major groove. The structure is compared with other minor-groove-binding drug complexes and the influence of these drugs on DNA A-tracts is discussed.

Three-dimensional crystal structure of the A-tract DNA dodecamer d(CGCAAATTTGCG) complexed with the minor-groove-binding drug Hoechst 33258.,Vega MC, Garcia Saez I, Aymami J, Eritja R, Van der Marel GA, Van Boom JH, Rich A, Coll M Eur J Biochem. 1994 Jun 15;222(3):721-6. PMID:7517864<ref>PMID:7517864</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 264d" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Aymami, J]]

[[Category: Boom, J H.Van]]

[[Category: Coll, M]]

[[Category: Eritja, R]]

[[Category: Garcia-Saez, I]]

[[Category: Marel, G A.Van Der]]

[[Category: Rich, A]]

[[Category: Vega, M C]]

[[Category: B-dna]]

[[Category: Complexed with drug]]

[[Category: Double helix]]