Potassium in PDB 3nd4: Watson-Crick 16-Mer Dsrna

The structure of Watson-Crick 16-Mer Dsrna, PDB code: 3nd4 was solved by B.H.Mooers, A.Singh, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	18.39 / 1.52
Space group	H 3 2
Cell size a, b, c (Å), α, β, γ (°)	41.094, 41.094, 123.690, 90.00, 90.00, 120.00
R / Rfree (%)	17.2 / 21.4

The structure of Watson-Crick 16-Mer Dsrna also contains other interesting chemical elements:

Magnesium	(Mg)	1 atom
Sodium	(Na)	1 atom

The binding sites of Potassium atom in the Watson-Crick 16-Mer Dsrna (pdb code 3nd4). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total only one binding site of Potassium was determined in the Watson-Crick 16-Mer Dsrna, PDB code: 3nd4:

Potassium binding site 1 out of 1 in the Watson-Crick 16-Mer Dsrna


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Watson-Crick 16-Mer Dsrna within 5.0Å range: probe atom residue distance (Å) B Occ A:K18 b:17.2 occ:0.33 O2' A:A6 2.8 14.9 1.0 O3' A:A6 3.0 14.2 1.0 OP1 A:G7 3.3 17.8 1.0 HO2' A:A6 3.4 17.9 1.0 O5' A:G7 3.5 16.3 1.0 P A:G7 3.5 16.7 1.0 MG A:MG17 3.6 15.4 0.3 H4' A:A6 3.8 19.7 1.0 C2' A:A6 3.8 16.4 1.0 C3' A:A6 3.9 13.8 1.0 H2' A:A6 4.3 19.7 1.0 C4' A:A6 4.4 16.4 1.0 H4' A:G7 4.5 15.0 1.0 C5' A:G7 4.7 15.0 1.0 H3' A:A6 4.8 16.6 1.0 H5' A:G7 4.9 18.0 1.0 OP2 A:G7 4.9 16.8 1.0 C4' A:G7 5.0 12.5 1.0

B.H.Mooers, A.Singh. The Crystal Structure of An Oligo(U):Pre-Mrna Duplex From A Trypanosome Rna Editing Substrate. Rna V. 17 1870 2011.
ISSN: ISSN 1355-8382
PubMed: 21878548
DOI: 10.1261/RNA.2880311