4u3l

octameric RNA duplex co-crystallized in calcium(II)chloride

spinqualitylabelsall models 4u3l, resolution 1.48Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4u3l is a 2 chain structure with sequence from Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.482Å Ligands: CA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Due to the polyanionic nature of RNA, the principles of charge neutralization and electrostatic condensation require that cations help to overcome the repulsive forces in order for RNA to adopt a three-dimensional structure. A precise structural knowledge of RNA-metal ion interactions is crucial to understand the mechanism of metal ions in the catalytic or regulatory activity of RNA. We solved the crystal structure of an octameric RNA duplex in the presence of the di- and trivalent metal ions Ca(2+), Mn(2+), Co(2+), Cu(2+), Sr(2+), and Tb(3+). The detailed investigation reveals a unique innersphere interaction to uracil and extends the knowledge of the influence of metal ions for conformational changes in RNA structure. Furthermore, we could demonstrate that an accurate localization of the metal ions in the X-ray structures require the consideration of several crystallographic and geometrical parameters as well as the anomalous difference map. The X-ray Structures of Six Octameric RNA Duplexes in the Presence of Different Di- and Trivalent Cations.,Schaffer MF, Peng G, Spingler B, Schnabl J, Wang M, Olieric V, Sigel RK Int J Mol Sci. 2016 Jun 27;17(7). pii: E988. doi: 10.3390/ijms17070988. PMID:27355942 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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