View source for 6aqw


==Crystal Structure of Z-DNA with 6-fold Twinning_Z4A==
<StructureSection load='6aqw' size='340' side='right'caption='[[6aqw]], [[Resolution|resolution]] 1.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6aqw]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6AQW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6AQW FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.3&#8491;</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=6aqw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6aqw OCA], [https://pdbe.org/6aqw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6aqw RCSB], [https://www.ebi.ac.uk/pdbsum/6aqw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6aqw ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
DNA oligomer duplexes containing alternating cytosines and guanines in their sequences tend to form left-handed helices of the Z-DNA type, with the sugar and phosphate backbone in a zigzag conformation and a helical repeat of two successive nucleotides. Z-DNA duplexes usually crystallize as hexagonally arranged parallel helical tubes, with various relative orientations and translation of neighboring duplexes. Four novel high-resolution crystal structures of d(CGCGCG)2 duplexes are described here. They are characterized by a high degree of pseudosymmetry and/or twinning, with three or four independent duplexes differently oriented in a monoclinic P21 lattice of hexagonal metric. The various twinning criteria give somewhat conflicting indications in these complicated cases of crystal pathology. The details of molecular packing in these crystal structures are compared with other known crystal forms of Z-DNA.

Four highly pseudosymmetric and/or twinned structures of d(CGCGCG)2 extend the repertoire of crystal structures of Z-DNA.,Luo Z, Dauter Z, Gilski M Acta Crystallogr D Struct Biol. 2017 Nov 1;73(Pt 11):940-951. doi:, 10.1107/S2059798317014954. Epub 2017 Oct 30. PMID:29095165<ref>PMID:29095165</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Z-DNA|Z-DNA]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Dauter Z]]
[[Category: Gilski M]]
[[Category: Luo Z]]