Potassium in PDB 1k4c: Potassium Channel Kcsa-Fab Complex in High Concentration of K+

The structure of Potassium Channel Kcsa-Fab Complex in High Concentration of K+, PDB code: 1k4c was solved by Y.Zhou, J.H.Morais-Cabral, A.Kaufman, R.Mackinnon, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	40.00 / 2.00
Space group	I 4
Cell size a, b, c (Å), α, β, γ (°)	155.330, 155.330, 76.270, 90.00, 90.00, 90.00
R / Rfree (%)	21.8 / 23.3

The binding sites of Potassium atom in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+ (pdb code 1k4c). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 7 binding sites of Potassium where determined in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+, PDB code: 1k4c:
Jump to Potassium binding site number: 1; 2; 3; 4; 5; 6; 7;

Potassium binding site 1 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3001 b:14.5 occ:0.25 O C:TYR78 2.8 15.8 1.0 O C:GLY77 3.1 14.7 1.0 K C:K3002 3.4 15.5 0.2 C C:TYR78 3.4 17.1 1.0 CA C:TYR78 4.1 17.1 1.0 N C:GLY79 4.2 17.6 1.0 C C:GLY77 4.2 16.1 1.0 CA C:GLY79 4.4 18.0 1.0 K C:K3007 4.5 65.4 0.2 N C:TYR78 4.6 15.8 1.0

Potassium binding site 2 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3002 b:15.5 occ:0.25 O C:GLY77 2.7 14.7 1.0 O C:VAL76 2.8 15.0 1.0 K C:K3003 3.2 15.7 0.2 K C:K3001 3.4 14.5 0.2 C C:GLY77 3.5 16.1 1.0 C C:VAL76 4.0 15.6 1.0 CA C:GLY77 4.1 15.7 1.0 N C:TYR78 4.5 15.8 1.0 N C:GLY77 4.5 15.4 1.0 CA C:TYR78 4.8 17.1 1.0

Potassium binding site 3 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 3 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3003 b:15.7 occ:0.25 O C:THR75 2.7 17.4 1.0 O C:VAL76 2.9 15.0 1.0 K C:K3002 3.2 15.5 0.2 K C:K3004 3.3 16.8 0.2 C C:VAL76 3.6 15.6 1.0 C C:THR75 3.9 16.7 1.0 CA C:VAL76 4.0 15.7 1.0 N C:VAL76 4.4 16.1 1.0 N C:GLY77 4.6 15.4 1.0 CA C:GLY77 5.0 15.7 1.0

Potassium binding site 4 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 4 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3004 b:16.8 occ:0.25 OG1 C:THR75 2.9 18.7 1.0 O C:THR75 2.9 17.4 1.0 K C:K3003 3.3 15.7 0.2 CB C:THR75 3.5 17.0 1.0 C C:THR75 3.8 16.7 1.0 CA C:THR75 4.3 16.8 1.0 CG2 C:THR75 4.8 17.5 1.0 N C:VAL76 4.8 16.1 1.0 O C:THR74 4.8 15.8 1.0

Potassium binding site 5 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 5 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3005 b:24.9 occ:0.25 O C:HOH3009 3.3 45.2 1.0 O C:HOH3011 3.4 42.8 1.0

Potassium binding site 6 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 6 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3006 b:47.5 occ:0.25 K C:K3007 3.0 65.4 0.2 O C:HOH3010 3.4 54.3 1.0

Potassium binding site 7 out of 7 in the Potassium Channel Kcsa-Fab Complex in High Concentration of K+


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 7 of Potassium Channel Kcsa-Fab Complex in High Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:K3007 b:65.4 occ:0.25 K C:K3006 3.0 47.5 0.2 O C:TYR78 4.3 15.8 1.0 O C:HOH3010 4.3 54.3 1.0 K C:K3001 4.5 14.5 0.2 CA C:GLY79 4.8 18.0 1.0 O C:GLY79 4.9 18.5 1.0

Y.Zhou, J.H.Morais-Cabral, A.Kaufman, R.Mackinnon. Chemistry of Ion Coordination and Hydration Revealed By A K+ Channel-Fab Complex at 2.0 A Resolution. Nature V. 414 43 2001.
ISSN: ISSN 0028-0836
PubMed: 11689936
DOI: 10.1038/35102009