2jja | pdb_00002jja

CRYSTAL STRUCTURE OF GNA WITH SYNTHETIC COPPER BASE PAIR

spinqualitylabelsall models 2jja, resolution 1.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2jja is a 1 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, MG, NA, NCO NonStd Res: ZAD, ZCY, ZGU, ZHP, ZTH Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The crystal structure of an 8-mer (S)-GNA duplex is presented. As a tool for phasing, the anomalous diffraction of two copper(II) ions within two artificial metallo-base pairs was employed. The duplex structure confirms a canonical Watson-Crick base pairing scheme of GNA with antiparallel strands. The duplex secondary structure is distinct from canonical A- and B-form nucleic acids and can be described as a right-handed helical ribbon wrapped around the helix axis, resulting in a large hollow core. Most intriguingly, neighboring base pairs slide strongly against each other, resulting in extensive interstrand base-base hydrophobic interactions along with unusual hydrophobic intrastrand interactions of nucleobases with their backbone. These results reveal how a minimal nucleic acid backbone can support highly stable Watson-Crick-like duplex formation. Duplex structure of a minimal nucleic acid.,Schlegel MK, Essen LO, Meggers E J Am Chem Soc. 2008 Jul 2;130(26):8158-9. Epub 2008 Jun 5. PMID:18529005 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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