Potassium in PDB 5fkh: Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu

The structure of Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu, PDB code: 5fkh was solved by L.Huang, D.M.J.Lilley, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	42.499 / 2.65
Space group	P 43 21 2
Cell size a, b, c (Å), α, β, γ (°)	62.496, 62.496, 155.065, 90.00, 90.00, 90.00
R / Rfree (%)	23.07 / 27.75

The structure of Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu also contains other interesting chemical elements:

Barium	(Ba)	12 atoms
Sodium	(Na)	2 atoms

The binding sites of Potassium atom in the Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu (pdb code 5fkh). 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 Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu, PDB code: 5fkh:

Potassium binding site 1 out of 1 in the Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Sam-I Riboswitch Bearing the H. Marismortui Kt-7 Variant 3BN Is Cu within 5.0Å range: probe atom residue distance (Å) B Occ A:K1108 b:0.3 occ:1.00 O4 A:U81 3.1 0.9 1.0 O6 A:G82 3.1 0.3 1.0 C4 A:U81 3.9 0.6 1.0 C6 A:G82 4.2 0.4 1.0 C5 A:U81 4.3 0.2 1.0 N7 A:G82 4.3 0.6 1.0 OP1 A:U67 4.4 0.8 1.0 N4 A:C69 4.5 0.1 1.0 C5 A:G82 4.6 0.2 1.0 N6 A:A70 4.6 0.8 1.0 O4 A:U80 5.0 0.8 1.0

L.Huang, J.Wang, D.M.J.Lilley. A Critical Base Pair in K-Turns Determines the Conformational Class Adopted, and Correlates with Biological Function. Nucleic Acids Res. V. 44 5390 2016.
ISSN: ISSN 0305-1048
PubMed: 27016741
DOI: 10.1093/NAR/GKW201