Potassium in PDB 7oq1: Nak S-Elm Mutant with Na+ and K+

The structure of Nak S-Elm Mutant with Na+ and K+, PDB code: 7oq1 was solved by S.Minniberger, A.J.R.Plested, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	59.45 / 1.85
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	81.214, 87.277, 48.98, 90, 90, 90
R / Rfree (%)	16 / 18.6

The structure of Nak S-Elm Mutant with Na+ and K+ also contains other interesting chemical elements:

Sodium	(Na)	2 atoms
Chlorine	(Cl)	1 atom

The binding sites of Potassium atom in the Nak S-Elm Mutant with Na+ and K+ (pdb code 7oq1). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 3 binding sites of Potassium where determined in the Nak S-Elm Mutant with Na+ and K+, PDB code: 7oq1:
Jump to Potassium binding site number: 1; 2; 3;

Potassium binding site 1 out of 3 in the Nak S-Elm Mutant with Na+ and K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Nak S-Elm Mutant with Na+ and K+ within 5.0Å range: probe atom residue distance (Å) B Occ A:K206 b:19.3 occ:0.50 O A:THR63 2.8 15.8 1.0 O B:THR63 2.8 18.5 1.0 O B:VAL64 2.9 20.9 1.0 O A:VAL64 2.9 20.5 1.0 C A:VAL64 3.5 20.6 1.0 C B:VAL64 3.6 24.0 1.0 K A:K207 3.6 19.7 0.5 HA A:VAL64 3.7 20.8 1.0 HA B:VAL64 3.8 22.2 1.0 HA3 A:GLY65 3.9 32.7 1.0 C A:THR63 3.9 15.8 1.0 C B:THR63 4.0 16.1 1.0 HA3 B:GLY65 4.0 27.4 1.0 CA A:VAL64 4.1 17.4 1.0 CA B:VAL64 4.2 18.5 1.0 N A:GLY65 4.4 20.0 1.0 N B:GLY65 4.4 22.1 1.0 N A:VAL64 4.5 17.9 1.0 N B:VAL64 4.6 16.7 1.0 CA A:GLY65 4.6 27.2 1.0 O A:HOH310 4.7 35.7 1.0 CA B:GLY65 4.7 22.8 1.0 HB A:THR63 4.7 23.7 1.0 HB B:THR63 4.8 25.2 1.0 O B:HOH314 4.8 36.1 1.0

Potassium binding site 2 out of 3 in the Nak S-Elm Mutant with Na+ and K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Nak S-Elm Mutant with Na+ and K+ within 5.0Å range: probe atom residue distance (Å) B Occ A:K207 b:19.7 occ:0.50 OG1 A:THR63 2.7 18.5 1.0 OG1 B:THR63 2.8 17.6 1.0 HB B:THR63 2.9 25.2 1.0 O A:THR63 2.9 15.8 1.0 O B:THR63 2.9 18.5 1.0 HB A:THR63 2.9 23.7 1.0 CB B:THR63 3.3 21.0 1.0 CB A:THR63 3.3 19.7 1.0 K A:K206 3.6 19.3 0.5 C B:THR63 3.6 16.1 1.0 C A:THR63 3.7 15.8 1.0 CA B:THR63 4.1 16.0 1.0 CA A:THR63 4.2 17.5 1.0 HA B:VAL64 4.4 22.2 1.0 HA A:VAL64 4.5 20.8 1.0 N B:VAL64 4.6 16.7 1.0 HG21 A:THR63 4.6 24.4 1.0 HG21 B:THR63 4.6 24.4 1.0 HA B:THR63 4.6 19.2 1.0 CG2 A:THR63 4.6 20.3 1.0 CG2 B:THR63 4.6 20.3 1.0 N A:VAL64 4.6 17.9 1.0 HA A:THR63 4.7 21.0 1.0 CA B:VAL64 5.0 18.5 1.0 O A:THR62 5.0 21.4 1.0 O B:THR62 5.0 18.1 1.0

Potassium binding site 3 out of 3 in the Nak S-Elm Mutant with Na+ and K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 3 of Nak S-Elm Mutant with Na+ and K+ within 5.0Å range: probe atom residue distance (Å) B Occ B:K203 b:84.2 occ:0.50 O B:HOH314 2.6 36.1 1.0 O B:HOH308 2.7 41.3 1.0 O A:HOH310 2.7 35.7 1.0 NA B:NA210 3.7 47.7 0.5 HA3 A:GLY65 4.2 32.7 1.0 HA3 B:GLY65 4.3 27.4 1.0 OE2 B:GLU67 4.4 68.3 1.0 O B:SER66 4.5 35.2 1.0 O A:SER66 4.6 33.3 1.0 O A:VAL64 4.6 20.5 1.0 O B:VAL64 4.8 20.9 1.0 H B:SER66 4.8 52.6 1.0 N B:SER66 4.8 43.9 1.0 C A:GLY65 4.9 22.6 1.0 C B:GLY65 4.9 26.3 1.0 C B:SER66 4.9 40.9 1.0 CA A:GLY65 5.0 27.2 1.0

S.Minniberger, S.Abdolvand, S.Braunbeck, H.Sun, A.J.R.Plested. Asymmetry and Ion Selectivity Properties in the Bacterial Channel Nak Mimicking Ionotropic Glutamate Receptors To Be Published.