4U3O: Octameric Rna Duplex Soaked In Manganese(ii)chloride

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.
PDB ID: 4U3ODownload
MMDB ID: 131245
PDB Deposition Date: 2014/7/22
Updated in MMDB: 2016/08
Experimental Method:
x-ray diffraction
Resolution: 1.8  Å
Source Organism:
Biological Unit for 4U3O: dimeric; determined by author and by software (PISA)
Molecular Components in 4U3O
Label Count Molecule
Nucleotide(1 molecule)
RNA (5'-r(*up*cp*gp*up*ap*cp*gp*a)-3')
Molecule annotation
Chemicals (4 molecules)
* Click molecule labels to explore molecular sequence information.

Citing MMDB