Rubidium in PDB 1r3i: Potassium Channel Kcsa-Fab Complex in Rb+

The structure of Potassium Channel Kcsa-Fab Complex in Rb+, PDB code: 1r3i was solved by Y.Zhou, R.Mackinnon, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	30.00 / 2.40
Space group	I 4
Cell size a, b, c (Å), α, β, γ (°)	155.840, 155.840, 75.870, 90.00, 90.00, 90.00
R / Rfree (%)	21.7 / 23.6

The binding sites of Rubidium atom in the Potassium Channel Kcsa-Fab Complex in Rb+ (pdb code 1r3i). This binding sites where shown within 5.0 Angstroms radius around Rubidium atom.
In total 4 binding sites of Rubidium where determined in the Potassium Channel Kcsa-Fab Complex in Rb+, PDB code: 1r3i:
Jump to Rubidium binding site number: 1; 2; 3; 4;

Rubidium binding site 1 out of 4 in the Potassium Channel Kcsa-Fab Complex in Rb+


Mono view


Stereo pair view

A full contact list of Rubidium with other atoms in the Rb binding site number 1 of Potassium Channel Kcsa-Fab Complex in Rb+ within 5.0Å range: probe atom residue distance (Å) B Occ C:Rb201 b:23.6 occ:0.25 O C:TYR78 3.1 14.5 1.0 O C:GLY77 3.1 17.8 1.0 C C:TYR78 3.5 16.1 1.0 CA C:TYR78 4.1 16.3 1.0 C C:GLY77 4.2 18.2 1.0 N C:GLY79 4.2 17.8 1.0 CA C:GLY79 4.5 17.7 1.0 N C:TYR78 4.6 16.4 1.0

Rubidium binding site 2 out of 4 in the Potassium Channel Kcsa-Fab Complex in Rb+


Mono view


Stereo pair view

A full contact list of Rubidium with other atoms in the Rb binding site number 2 of Potassium Channel Kcsa-Fab Complex in Rb+ within 5.0Å range: probe atom residue distance (Å) B Occ C:Rb202 b:29.8 occ:0.25 O C:VAL76 2.9 16.1 1.0 O C:THR75 3.1 18.6 1.0 C C:VAL76 3.6 17.2 1.0 RB C:RB203 3.8 22.8 0.2 CA C:VAL76 4.2 15.3 1.0 C C:THR75 4.2 17.0 1.0 N C:GLY77 4.4 18.4 1.0 O C:GLY77 4.6 17.8 1.0 CA C:GLY77 4.7 18.0 1.0 N C:VAL76 4.7 15.6 1.0 C C:GLY77 4.8 18.2 1.0

Rubidium binding site 3 out of 4 in the Potassium Channel Kcsa-Fab Complex in Rb+


Mono view


Stereo pair view

A full contact list of Rubidium with other atoms in the Rb binding site number 3 of Potassium Channel Kcsa-Fab Complex in Rb+ within 5.0Å range: probe atom residue distance (Å) B Occ C:Rb203 b:22.8 occ:0.25 OG1 C:THR75 3.0 18.1 1.0 O C:THR75 3.1 18.6 1.0 CB C:THR75 3.6 18.2 1.0 RB C:RB202 3.8 29.8 0.2 C C:THR75 3.9 17.0 1.0 CA C:THR75 4.4 17.8 1.0 N C:VAL76 4.8 15.6 1.0 CG2 C:THR75 4.8 19.4 1.0 O C:THR74 5.0 16.5 1.0

Rubidium binding site 4 out of 4 in the Potassium Channel Kcsa-Fab Complex in Rb+


Mono view


Stereo pair view

A full contact list of Rubidium with other atoms in the Rb binding site number 4 of Potassium Channel Kcsa-Fab Complex in Rb+ within 5.0Å range: probe atom residue distance (Å) B Occ C:Rb204 b:34.5 occ:0.25 O C:HOH302 3.6 33.8 1.0 O C:HOH306 3.6 42.2 1.0

Y.Zhou, R.Mackinnon. The Occupancy of Ions in the K+ Selectivity Filter: Charge Balance and Coupling of Ion Binding to A Protein Conformational Change Underlie High Conduction Rates J.Mol.Biol. V. 333 965 2003.
ISSN: ISSN 0022-2836
PubMed: 14583193
DOI: 10.1016/J.JMB.2003.09.022