Potassium in PDB 6mc4: Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex

The structure of Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex, PDB code: 6mc4 was solved by B.Chu, P.J.Paukstelis, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	26.99 / 2.25
Space group	P 31 2 1
Cell size a, b, c (Å), α, β, γ (°)	53.743, 53.743, 99.389, 90.00, 90.00, 120.00
R / Rfree (%)	22.8 / 26.8

The structure of Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex also contains other interesting chemical elements:

Calcium

(Ca)

10 atoms

The binding sites of Potassium atom in the Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex (pdb code 6mc4). 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 Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex, PDB code: 6mc4:

Potassium binding site 1 out of 1 in the Crystal Structure of A Tetrameric Dna Fold-Back 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 Tetrameric Dna Fold-Back Quadruplex within 5.0Å range: probe atom residue distance (Å) B Occ B:K101 b:55.6 occ:1.00 OP1 B:DA5 2.6 53.2 1.0 OP1 B:DT3 2.7 36.6 1.0 P B:DA5 4.1 45.8 1.0 P B:DT3 4.2 41.4 1.0 OP2 B:DA5 4.7 49.3 1.0 OP1 B:DG2 4.7 34.0 1.0 OP2 B:DT3 4.8 34.1 1.0 C3' B:DG2 4.8 30.5 1.0 O3' B:DC4 4.9 47.4 1.0 O5' B:DA5 5.0 43.2 1.0

B.Chu, D.Zhang, W.Hwang, P.J.Paukstelis. Crystal Structure of A Tetrameric Dna Fold-Back Quadruplex. J. Am. Chem. Soc. V. 140 16291 2018.
ISSN: ESSN 1520-5126
PubMed: 30384604
DOI: 10.1021/JACS.8B10153