Chlorine in PDB 4l73: CA2+-Bound Mthk Rck Domain at 2.5 Angstrom

The structure of CA2+-Bound Mthk Rck Domain at 2.5 Angstrom, PDB code: 4l73 was solved by F.J.Smith, B.S.Rothberg, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	39.51 / 2.50
Space group	P 31 2 1
Cell size a, b, c (Å), α, β, γ (°)	67.960, 67.960, 159.891, 90.00, 90.00, 120.00
R / Rfree (%)	17.8 / 22.6

The structure of CA2+-Bound Mthk Rck Domain at 2.5 Angstrom also contains other interesting chemical elements:

Calcium	(Ca)	5 atoms
Sodium	(Na)	8 atoms

The binding sites of Chlorine atom in the CA2+-Bound Mthk Rck Domain at 2.5 Angstrom (pdb code 4l73). This binding sites where shown within 5.0 Angstroms radius around Chlorine atom.
In total only one binding site of Chlorine was determined in the CA2+-Bound Mthk Rck Domain at 2.5 Angstrom, PDB code: 4l73:

Chlorine binding site 1 out of 1 in the CA2+-Bound Mthk Rck Domain at 2.5 Angstrom


Mono view


Stereo pair view

A full contact list of Chlorine with other atoms in the Cl binding site number 1 of CA2+-Bound Mthk Rck Domain at 2.5 Angstrom within 5.0Å range: probe atom residue distance (Å) B Occ B:Cl403 b:56.9 occ:0.50 N B:HIS161 3.5 45.4 1.0 NH2 B:ARG149 3.9 57.1 1.0 CA B:VAL160 3.9 45.7 1.0 O B:PHE159 4.1 54.6 1.0 NH1 B:ARG149 4.2 52.9 1.0 C B:VAL160 4.2 47.0 1.0 CB B:HIS161 4.3 56.1 1.0 CA B:HIS161 4.5 53.4 1.0 CG1 B:VAL160 4.5 43.7 1.0 CZ B:ARG149 4.5 56.3 1.0 O B:HIS161 4.8 48.0 1.0 CB B:VAL160 4.8 43.9 1.0 N B:VAL160 4.8 46.3 1.0 C B:PHE159 4.8 48.5 1.0

F.J.Smith, V.P.Pau, G.Cingolani, B.S.Rothberg. Structural Basis of Allosteric Interactions Among Ca(2+)-Binding Sites in A K(+) Channel Rck Domain. Nat Commun V. 4 2621 2013.
ISSN: ESSN 2041-1723
PubMed: 24126388
DOI: 10.1038/NCOMMS3621