Calcium in PDB 3e8g: Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex

The structure of Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex, PDB code: 3e8g was solved by Y.Jiang, A.Alam, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	33.99 / 2.00
Space group	I 4
Cell size a, b, c (Å), α, β, γ (°)	67.990, 67.990, 89.168, 90.00, 90.00, 90.00
R / Rfree (%)	20.2 / 23.5

The structure of Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex also contains other interesting chemical elements:

Caesium	(Cs)	2 atoms
Sodium	(Na)	4 atoms

The binding sites of Calcium atom in the Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex (pdb code 3e8g). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex, PDB code: 3e8g:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in the Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca3 b:38.3 occ:0.25 O A:GLY67 2.4 33.4 1.0 C A:GLY67 3.6 29.7 1.0 CA A:GLY67 4.4 33.4 1.0 N A:ASN68 4.6 29.0 1.0 CA A:ASN68 4.6 33.3 1.0 ND2 A:ASN68 4.8 40.8 1.0

Calcium binding site 2 out of 2 in the Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Crystal Structure of the the Open Nak Channel-Na+/CA2+ Complex within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca4 b:71.1 occ:0.25 O B:GLY67 2.4 63.3 1.0 C B:GLY67 3.6 62.2 1.0 OD1 B:ASN68 4.3 72.6 1.0 CA B:GLY67 4.4 61.0 1.0 N B:ASN68 4.5 64.4 1.0 CA B:ASN68 4.6 65.7 1.0

A.Alam, Y.Jiang. Structural Analysis of Ion Selectivity in the Nak Channel Nat.Struct.Mol.Biol. V. 16 35 2009.
ISSN: ISSN 1545-9993
PubMed: 19098915
DOI: 10.1038/NSMB.1537