Potassium in PDB 3ibk: Crystal Structure of A Telomeric Rna Quadruplex

The structure of Crystal Structure of A Telomeric Rna Quadruplex, PDB code: 3ibk was solved by G.W.Collie, S.Neidle, G.N.Parkinson, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	11.69 / 2.20
Space group	P 31 2 1
Cell size a, b, c (Å), α, β, γ (°)	57.583, 57.583, 38.377, 90.00, 90.00, 120.00
R / Rfree (%)	21.5 / 23.1

The structure of Crystal Structure of A Telomeric Rna Quadruplex also contains other interesting chemical elements:

Bromine

(Br)

2 atoms

The binding sites of Potassium atom in the Crystal Structure of A Telomeric Rna Quadruplex (pdb code 3ibk). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 2 binding sites of Potassium where determined in the Crystal Structure of A Telomeric Rna Quadruplex, PDB code: 3ibk:
Jump to Potassium binding site number: 1; 2;

Potassium binding site 1 out of 2 in the Crystal Structure of A Telomeric Rna Quadruplex


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Crystal Structure of A Telomeric Rna Quadruplex within 5.0Å range: probe atom residue distance (Å) B Occ A:K13 b:25.0 occ:1.00 O6 B:G17 2.6 19.1 1.0 O6 A:G5 2.7 16.7 1.0 O6 B:G23 2.7 26.6 1.0 O6 A:G11 2.7 23.9 1.0 O6 B:G22 2.7 27.1 1.0 O6 B:G16 2.7 21.8 1.0 O6 A:G4 2.8 16.6 1.0 O6 A:G10 2.9 17.3 1.0 C6 B:G16 3.6 15.6 1.0 C6 B:G17 3.6 19.5 1.0 C6 B:G23 3.6 26.2 1.0 C6 B:G22 3.6 25.2 1.0 K A:K14 3.6 28.1 1.0 C6 A:G11 3.7 17.8 1.0 C6 A:G5 3.7 12.8 1.0 C6 A:G10 3.7 15.4 1.0 C6 A:G4 3.7 14.6 1.0 N1 B:G16 3.8 15.7 1.0 N1 A:G11 3.9 17.2 1.0 N1 B:G17 3.9 18.8 1.0 N1 B:G23 3.9 26.0 1.0 N1 B:G22 3.9 19.7 1.0 N1 A:G10 4.0 16.8 1.0 N1 A:G4 4.1 14.7 1.0 N1 A:G5 4.1 14.8 1.0 C5 B:G16 4.8 16.7 1.0 C5 B:G17 4.9 20.9 1.0 C5 B:G23 4.9 26.0 1.0 C5 B:G22 4.9 25.5 1.0 C5 A:G10 4.9 16.1 1.0 C5 A:G4 4.9 12.5 1.0 C5 A:G5 5.0 12.8 1.0 C5 A:G11 5.0 15.5 1.0

Potassium binding site 2 out of 2 in the Crystal Structure of A Telomeric Rna Quadruplex


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Crystal Structure of A Telomeric Rna Quadruplex within 5.0Å range: probe atom residue distance (Å) B Occ A:K14 b:28.1 occ:1.00 O6 B:G15 2.7 22.0 1.0 O6 B:G21 2.7 21.4 1.0 O6 A:G9 2.7 13.4 1.0 O6 A:G3 2.8 16.1 1.0 O6 A:G10 2.9 17.3 1.0 O6 A:G4 3.0 16.6 1.0 O6 B:G16 3.0 21.8 1.0 O6 B:G22 3.1 27.1 1.0 C6 A:G9 3.5 9.8 1.0 C6 B:G15 3.6 19.3 1.0 K A:K13 3.6 25.0 1.0 C6 A:G3 3.7 13.1 1.0 C6 B:G21 3.7 18.9 1.0 C6 A:G10 3.8 15.4 1.0 N1 A:G9 3.8 10.4 1.0 C6 B:G16 3.8 15.6 1.0 C6 A:G4 3.8 14.6 1.0 C6 B:G22 3.8 25.2 1.0 N1 B:G15 3.8 20.6 1.0 N1 A:G3 3.9 11.8 1.0 N1 B:G21 3.9 19.2 1.0 N1 B:G22 4.0 19.7 1.0 N1 B:G16 4.0 15.7 1.0 N1 A:G10 4.1 16.8 1.0 N1 A:G4 4.1 14.7 1.0 C5 A:G9 4.7 12.0 1.0 C5 B:G15 4.9 17.0 1.0 C5 A:G3 4.9 13.8 1.0 C5 B:G16 5.0 16.7 1.0 C5 A:G4 5.0 12.5 1.0 C5 A:G10 5.0 16.1 1.0 C5 B:G22 5.0 25.5 1.0 C2 A:G9 5.0 12.2 1.0 C5 B:G21 5.0 23.1 1.0

G.W.Collie, S.M.Haider, S.Neidle, G.N.Parkinson. A Crystallographic and Modelling Study of A Human Telomeric Rna (Terra) Quadruplex Nucleic Acids Res. V. 38 5569 2010.
ISSN: ISSN 0305-1048
PubMed: 20413582
DOI: 10.1093/NAR/GKQ259