Potassium in PDB 3cun: Aminoacyl-Trna Synthetase Ribozyme

The structure of Aminoacyl-Trna Synthetase Ribozyme, PDB code: 3cun was solved by H.Xiao, H.Murakami, H.Suga, A.R.Ferre-D'amare, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	28.75 / 3.00
Space group	C 1 2 1
Cell size a, b, c (Å), α, β, γ (°)	191.368, 48.076, 90.645, 90.00, 93.50, 90.00
R / Rfree (%)	25.2 / 30.3

The structure of Aminoacyl-Trna Synthetase Ribozyme also contains other interesting chemical elements:

Cobalt	(Co)	1 atom
Magnesium	(Mg)	9 atoms

The binding sites of Potassium atom in the Aminoacyl-Trna Synthetase Ribozyme (pdb code 3cun). 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 Aminoacyl-Trna Synthetase Ribozyme, PDB code: 3cun:

Potassium binding site 1 out of 1 in the Aminoacyl-Trna Synthetase Ribozyme


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Aminoacyl-Trna Synthetase Ribozyme within 5.0Å range: probe atom residue distance (Å) B Occ C:K511 b:83.1 occ:1.00 N1 C:U17 2.8 66.1 1.0 C6 C:U17 2.9 65.9 1.0 C2 C:U17 2.9 66.9 1.0 C2' C:U17 3.1 69.5 1.0 N3 C:U17 3.2 65.7 1.0 C5 C:U17 3.2 66.5 1.0 C4 C:U17 3.3 66.8 1.0 C1' C:U17 3.5 67.7 1.0 N4 C:C19 3.6 76.2 1.0 O2 C:U17 3.6 69.9 1.0 C3' C:U17 3.8 68.0 1.0 C5 C:C19 4.1 75.0 1.0 O4 C:U17 4.1 74.7 1.0 O2' C:U17 4.2 73.5 1.0 C4 C:C19 4.3 74.8 1.0 O4' C:U17 4.4 66.7 1.0 OP1 C:C19 4.7 73.7 1.0 O3' C:U17 4.7 70.2 1.0 OP2 C:U18 4.8 69.4 1.0 C4' C:U17 4.8 67.5 1.0

H.Xiao, H.Murakami, H.Suga, A.R.Ferre-D'amare. Structural Basis of Specific Trna Aminoacylation By A Small in Vitro Selected Ribozyme. Nature V. 454 358 2008.
ISSN: ISSN 0028-0836
PubMed: 18548004
DOI: 10.1038/NATURE07033