Barium in PDB 2itd: Potassium Channel Kcsa-Fab Complex in Barium Chloride

The structure of Potassium Channel Kcsa-Fab Complex in Barium Chloride, PDB code: 2itd was solved by S.W.Lockless, M.Zhou, R.Mackinnon, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	42.83 / 2.70
Space group	I 4
Cell size a, b, c (Å), α, β, γ (°)	156.075, 156.075, 75.424, 90.00, 90.00, 90.00
R / Rfree (%)	24.1 / 26.1

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

Barium binding site 1 out of 2 in the Potassium Channel Kcsa-Fab Complex in Barium Chloride


Mono view


Stereo pair view

A full contact list of Barium with other atoms in the Ba binding site number 1 of Potassium Channel Kcsa-Fab Complex in Barium Chloride within 5.0Å range: probe atom residue distance (Å) B Occ C:Ba125 b:48.4 occ:0.25 O C:THR75 2.8 40.2 1.0 OG1 C:THR75 3.2 38.5 1.0 C C:THR75 3.7 40.6 1.0 CB C:THR75 3.8 39.1 1.0 CA C:THR75 4.5 41.7 1.0 N C:VAL76 4.6 43.5 1.0 CA C:VAL76 4.7 46.5 1.0 O C:VAL76 4.8 47.4 1.0 C C:VAL76 4.9 47.0 1.0

Barium binding site 2 out of 2 in the Potassium Channel Kcsa-Fab Complex in Barium Chloride


Mono view


Stereo pair view

A full contact list of Barium with other atoms in the Ba binding site number 2 of Potassium Channel Kcsa-Fab Complex in Barium Chloride within 5.0Å range: probe atom residue distance (Å) B Occ C:Ba126 b:0.1 occ:0.25 O C:GLY77 3.0 52.9 1.0 C C:GLY77 3.6 50.5 1.0 O C:VAL76 3.8 47.4 1.0 O C:HOH127 3.9 29.6 0.2 CA C:GLY77 4.1 51.0 1.0 N C:TYR78 4.4 47.7 1.0 CA C:TYR78 4.7 42.5 1.0 C C:VAL76 4.8 47.0 1.0 C C:TYR78 4.8 41.9 1.0 N C:GLY77 4.9 51.5 1.0 O C:TYR78 5.0 45.1 1.0

S.W.Lockless, M.Zhou, R.Mackinnon. Structural and Thermodynamic Properties of Selective Ion Binding in A K(+) Channel. Plos Biol. V. 5 E121 2007.
ISSN: ISSN 1544-9173
PubMed: 17472437
DOI: 10.1371/JOURNAL.PBIO.0050121