Sodium in PDB 1k4d: Potassium Channel Kcsa-Fab Complex in Low Concentration of K+

The structure of Potassium Channel Kcsa-Fab Complex in Low Concentration of K+, PDB code: 1k4d 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)	30.00 / 2.30
Space group	I 4
Cell size a, b, c (Å), α, β, γ (°)	155.290, 155.290, 75.740, 90.00, 90.00, 90.00
R / Rfree (%)	21.8 / 23.5

The structure of Potassium Channel Kcsa-Fab Complex in Low Concentration of K+ also contains other interesting chemical elements:

Potassium

(K)

2 atoms

The binding sites of Sodium atom in the Potassium Channel Kcsa-Fab Complex in Low Concentration of K+ (pdb code 1k4d). This binding sites where shown within 5.0 Angstroms radius around Sodium atom.
In total only one binding site of Sodium was determined in the Potassium Channel Kcsa-Fab Complex in Low Concentration of K+, PDB code: 1k4d:

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


Mono view


Stereo pair view

A full contact list of Sodium with other atoms in the Na binding site number 1 of Potassium Channel Kcsa-Fab Complex in Low Concentration of K+ within 5.0Å range: probe atom residue distance (Å) B Occ C:Na2003 b:39.7 occ:0.25 O C:HOH2008 3.5 57.8 1.0 O C:HOH2043 3.6 92.6 0.2 O C:HOH2024 4.3 77.4 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