3p4j

Ultra-high resolution structure of d(CGCGCG)2 Z-DNA

spinqualitylabelsall models 3p4j, resolution 0.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3p4j is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 0.55Å Ligands: SPM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The crystal structure of a Z-DNA hexamer duplex d(CGCGCG)(2) determined at ultra high resolution of 0.55 A and refined without restraints, displays a high degree of regularity and rigidity in its stereochemistry, in contrast to the more flexible B-DNA duplexes. The estimations of standard uncertainties of all individually refined parameters, obtained by full-matrix least-squares optimization, are comparable with values that are typical for small-molecule crystallography. The Z-DNA model generated with ultra high-resolution diffraction data can be used to revise the stereochemical restraints applied in lower resolution refinements. Detailed comparisons of the stereochemical library values with the present accurate Z-DNA parameters, shows in general a good agreement, but also reveals significant discrepancies in the description of guanine-sugar valence angles and in the geometry of the phosphate groups. High regularity of Z-DNA revealed by ultra high-resolution crystal structure at 0.55 A.,Brzezinski K, Brzuszkiewicz A, Dauter M, Kubicki M, Jaskolski M, Dauter Z Nucleic Acids Res. 2011 Aug 1;39(14):6238-48. Epub 2011 Apr 1. PMID:21459852 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Z-DNA

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