Barium in PDB 4hkr: Calcium Release-Activated Calcium (Crac) Channel Orai

The structure of Calcium Release-Activated Calcium (Crac) Channel Orai, PDB code: 4hkr was solved by S.B.Long, X.Hou, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	19.93 / 3.35
Space group	P 21 3
Cell size a, b, c (Å), α, β, γ (°)	117.910, 117.910, 117.910, 90.00, 90.00, 90.00
R / Rfree (%)	27.8 / 27.9

The structure of Calcium Release-Activated Calcium (Crac) Channel Orai also contains other interesting chemical elements:

Iron	(Fe)	2 atoms
Zinc	(Zn)	1 atom

The binding sites of Barium atom in the Calcium Release-Activated Calcium (Crac) Channel Orai (pdb code 4hkr). This binding sites where shown within 5.0 Angstroms radius around Barium atom.
In total only one binding site of Barium was determined in the Calcium Release-Activated Calcium (Crac) Channel Orai, PDB code: 4hkr:

Barium binding site 1 out of 1 in the Calcium Release-Activated Calcium (Crac) Channel Orai


Mono view


Stereo pair view

A full contact list of Barium with other atoms in the Ba binding site number 1 of Calcium Release-Activated Calcium (Crac) Channel Orai within 5.0Å range: probe atom residue distance (Å) B Occ A:Ba401 b:0.5 occ:0.33 OE1 A:GLU178 4.4 0.9 1.0 OE1 B:GLU178 4.4 0.1 1.0

X.Hou, L.Pedi, M.M.Diver, S.B.Long. Crystal Structure of the Calcium Release-Activated Calcium Channel Orai. Science V. 338 1308 2012.
ISSN: ISSN 0036-8075
PubMed: 23180775
DOI: 10.1126/SCIENCE.1228757