Potassium in PDB 3t86: D(Gcatgct) + Calcium

The structure of D(Gcatgct) + Calcium, PDB code: 3t86 was solved by C.J.Cardin, Y.Gan, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	29.11 / 1.90
Space group	C 2 2 2
Cell size a, b, c (Å), α, β, γ (°)	22.742, 58.341, 23.669, 90.00, 90.00, 90.00
R / Rfree (%)	23.9 / 27.9

The structure of D(Gcatgct) + Calcium also contains other interesting chemical elements:

Calcium

(Ca)

1 atom

The binding sites of Potassium atom in the D(Gcatgct) + Calcium (pdb code 3t86). 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 D(Gcatgct) + Calcium, PDB code: 3t86:

Potassium binding site 1 out of 1 in the D(Gcatgct) + Calcium


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of D(Gcatgct) + Calcium within 5.0Å range: probe atom residue distance (Å) B Occ A:K8 b:33.8 occ:0.50 OP1 A:DC2 2.8 16.4 1.0 OP1 A:DC6 2.9 23.6 1.0 O A:HOH102 3.1 17.4 1.0 O3' A:DG1 3.7 15.1 1.0 P A:DC2 3.7 15.3 1.0 P A:DC6 4.3 20.5 1.0 OP2 A:DC2 4.3 14.5 1.0 O3' A:DG5 4.4 19.0 1.0 C3' A:DG1 4.7 15.8 1.0

Y.Gan, J.H.Thorpe, S.C.M.Teixeira, A.Naseer, C.J.Cardin. A Novel Structure For the D(Gcatgct) Quadruplex in the Presence of Nickel and Cobalt Aqueous Cations : Comparison with the Vanadium, Barium and Calcium-Bound Structural Motif. To Be Published.