1d65

MOLECULAR STRUCTURE OF THE B-DNA DODECAMER D(CGCAAATTTGCG)2; AN EXAMINATION OF PROPELLER TWIST AND MINOR-GROOVE WATER STRUCTURE AT 2.2 ANGSTROMS RESOLUTION

spinqualitylabelsall models 1d65, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1d65 is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The crystal structure of the dodecanucleotide duplex d(CGCAAATTTGCG)2 has been solved to 2.2 A resolution and refined to an R-factor of 18.1% with the inclusion of 71 water molecules. The structure shows propeller twists of up to -20 degrees for the A.T base-pairs, although there is probably only one (weak) three-centre hydrogen bond in the six base-pair AT narrow minor-groove region. An extensive ribbon of hydration has been located in this groove that has features distinctive from the classic "spine of hydration". Solvation around phosphate groups is described, with several instances of water molecules bridging between phosphates. Molecular structure of the B-DNA dodecamer d(CGCAAATTTGCG)2. An examination of propeller twist and minor-groove water structure at 2.2 A resolution.,Edwards KJ, Brown DG, Spink N, Skelly JV, Neidle S J Mol Biol. 1992 Aug 20;226(4):1161-73. PMID:1518049 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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