Calcium in PDB 1sxn: Reduced Bovine Superoxide Dismutase at pH 5.0

All present enzymatic activity of Reduced Bovine Superoxide Dismutase at pH 5.0:
1.15.1.1;

The structure of Reduced Bovine Superoxide Dismutase at pH 5.0, PDB code: 1sxn was solved by M.Ferraroni, W.R.Rypniewski, B.Bruni, P.Orioli, K.S.Wilson, S.Mangani, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	10.00 / 1.90
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	104.690, 197.800, 50.830, 90.00, 90.00, 90.00
R / Rfree (%)	18 / n/a

The structure of Reduced Bovine Superoxide Dismutase at pH 5.0 also contains other interesting chemical elements:

Copper	(Cu)	2 atoms
Zinc	(Zn)	2 atoms

The binding sites of Calcium atom in the Reduced Bovine Superoxide Dismutase at pH 5.0 (pdb code 1sxn). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Reduced Bovine Superoxide Dismutase at pH 5.0, PDB code: 1sxn:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in the Reduced Bovine Superoxide Dismutase at pH 5.0


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Reduced Bovine Superoxide Dismutase at pH 5.0 within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca154 b:24.6 occ:0.50 OE1 A:GLU119 1.9 35.9 1.0 O A:HOH416 2.4 27.4 1.0 N A:SER140 2.8 11.0 1.0 CD A:GLU119 3.1 39.2 1.0 OG A:SER140 3.4 22.9 1.0 O A:HOH424 3.5 32.4 1.0 CA A:GLY139 3.5 9.6 1.0 CB A:SER140 3.5 15.1 1.0 CB A:GLU119 3.6 13.1 1.0 C A:GLY139 3.7 11.7 1.0 CA A:SER140 3.8 11.9 1.0 CG A:GLU119 3.9 28.1 1.0 OE2 A:GLU119 3.9 46.7 1.0 O A:HOH554 4.1 61.5 1.0 CG A:LYS120 4.3 21.8 1.0 CE A:LYS120 4.5 22.9 1.0 N A:GLY139 4.8 8.1 1.0 O A:ALA138 4.9 8.3 1.0 C A:SER140 4.9 9.1 1.0 O A:GLY139 4.9 11.0 1.0 O A:SER140 4.9 13.3 1.0

Calcium binding site 2 out of 2 in the Reduced Bovine Superoxide Dismutase at pH 5.0


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Reduced Bovine Superoxide Dismutase at pH 5.0 within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca154 b:50.9 occ:0.50 OE1 B:GLU119 1.9 46.4 1.0 CD B:GLU119 3.0 47.6 1.0 N B:SER140 3.4 37.3 1.0 OE2 B:GLU119 3.4 57.1 1.0 O B:HOH266 3.5 80.7 1.0 CA B:GLY139 3.5 34.4 1.0 C B:GLY139 4.0 36.9 1.0 CB B:SER140 4.1 39.7 1.0 CE B:LYS120 4.3 54.5 1.0 CG B:GLU119 4.3 41.0 1.0 OG B:SER140 4.3 46.4 1.0 CA B:SER140 4.4 38.3 1.0 CG B:LYS120 4.5 48.1 1.0 CB B:GLU119 4.5 37.8 1.0 N B:GLY139 4.8 26.7 1.0 CD B:LYS120 4.8 52.5 1.0

M.Ferraroni, W.R.Rypniewski, B.Bruni, P.Orioli, S.Mangani. Crystallographic Determination of Reduced Bovine Superoxide Dismutase at pH 5.0 and of Anion Binding to Its Active Site. J.Biol.Inorg.Chem. V. 3 411 1998.
ISSN: ISSN 0949-8257