191d

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==CRYSTAL STRUCTURE OF INTERCALATED FOUR-STRANDED D(C3T)==
==CRYSTAL STRUCTURE OF INTERCALATED FOUR-STRANDED D(C3T)==
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<StructureSection load='191d' size='340' side='right' caption='[[191d]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
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<StructureSection load='191d' size='340' side='right'caption='[[191d]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[191d]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=191D OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=191D FirstGlance]. <br>
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<table><tr><td colspan='2'>[[191d]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=191D OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=191D FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene><br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.4&#8491;</td></tr>
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<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=191d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=191d OCA], [http://www.rcsb.org/pdb/explore.do?structureId=191d RCSB], [http://www.ebi.ac.uk/pdbsum/191d PDBsum]</span></td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
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<table>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=191d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=191d OCA], [https://pdbe.org/191d PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=191d RCSB], [https://www.ebi.ac.uk/pdbsum/191d PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=191d ProSAT]</span></td></tr>
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<div style="background-color:#fffaf0;">
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</table>
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== Publication Abstract from PubMed ==
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The crystal structure of d(C3T), solved at 1.4 A resolution, reveals that the molecule forms a four-stranded intercalated complex. It consists of two parallel-stranded duplexes, each of which is held together by cytosine-protonated cytosine base pairs. The two duplexes are intercalated with each other and have opposite strand orientation. The molecule has a flat, lath-like appearance, and the covalently bonded cytosines have a slow right-handed twist of 17.1 degrees. However, there is considerable asymmetry. On one of the flat sides, the phosphate groups are rotated away from the center of the molecule. They are held in this orientation by bridging water molecules that bind the NH of cytosine and a phosphate group of an opposite chain. There is also considerable microheterogeneity in the structure. The cytosine hemiprotonation occurs even at pH 7 where stable crystals form.
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Crystal structure of intercalated four-stranded d(C3T) at 1.4 A resolution.,Kang CH, Berger I, Lockshin C, Ratliff R, Moyzis R, Rich A Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11636-40. PMID:7972115<ref>PMID:7972115</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Berger, I.]]
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[[Category: Large Structures]]
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[[Category: Kang, C.]]
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[[Category: Berger I]]
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[[Category: Lockshin, C.]]
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[[Category: Kang C]]
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[[Category: Moyzis, R.]]
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[[Category: Lockshin C]]
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[[Category: Ratliff, R.]]
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[[Category: Moyzis R]]
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[[Category: Rich, A.]]
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[[Category: Ratliff R]]
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[[Category: Base intercalated]]
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[[Category: Rich A]]
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[[Category: Dna]]
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[[Category: Mismatched]]
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[[Category: Parallel-stranded tetraplex]]
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[[Category: Quadruple helix]]
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[[Category: U-dna]]
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Current revision

CRYSTAL STRUCTURE OF INTERCALATED FOUR-STRANDED D(C3T)

PDB ID 191d

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