Potassium in PDB 4qka: C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak

The structure of C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak, PDB code: 4qka was solved by A.Gao, A.Serganov, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	29.01 / 3.20
Space group	P 31 2 1
Cell size a, b, c (Å), α, β, γ (°)	116.035, 116.035, 114.098, 90.00, 90.00, 120.00
R / Rfree (%)	17.1 / 19.7

The structure of C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak also contains other interesting chemical elements:

Magnesium	(Mg)	1 atom
Iridium	(Ir)	5 atoms

The binding sites of Potassium atom in the C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak (pdb code 4qka). 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 C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak, PDB code: 4qka:

Potassium binding site 1 out of 1 in the C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of C-Di-Amp Riboswitch From Thermoanaerobacter Pseudethanolicus, Iridium Hexamine Soak within 5.0Å range: probe atom residue distance (Å) B Occ A:K204 b:0.2 occ:1.00 OP1 A:G2 3.3 78.3 1.0 O3' A:GTP1 3.6 76.4 1.0 O2' A:GTP1 3.7 71.2 1.0 O2' A:U11 3.7 80.0 1.0 P A:G2 4.0 76.2 1.0 C5' A:G2 4.1 73.6 1.0 O2' A:C12 4.3 0.3 1.0 C1' A:C12 4.3 96.8 1.0 O2 A:U11 4.3 82.7 1.0 O4' A:C12 4.4 91.2 1.0 C2' A:U11 4.5 80.8 1.0 O5' A:G2 4.6 70.3 1.0 C2' A:GTP1 4.7 75.4 1.0 C3' A:GTP1 4.8 77.3 1.0 C2' A:C12 4.9 99.0 1.0

A.Gao, A.Serganov. Structural Insights Into Recognition of C-Di-Amp By the Ydao Riboswitch. Nat.Chem.Biol. V. 10 787 2014.
ISSN: ISSN 1552-4450
PubMed: 25086507
DOI: 10.1038/NCHEMBIO.1607