Calcium in PDB 3ax7: Bovine Xanthine Oxidase, Protease Cleaved Form

All present enzymatic activity of Bovine Xanthine Oxidase, Protease Cleaved Form:
1.17.1.4; 1.17.3.2;

The structure of Bovine Xanthine Oxidase, Protease Cleaved Form, PDB code: 3ax7 was solved by H.Ishikita, B.T.Eger, E.F.Pai, K.Okamoto, T.Nishino, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	36.37 / 2.34
Space group	P 1 21 1
Cell size a, b, c (Å), α, β, γ (°)	133.477, 73.151, 146.267, 90.00, 98.18, 90.00
R / Rfree (%)	19.4 / 24

The structure of Bovine Xanthine Oxidase, Protease Cleaved Form also contains other interesting chemical elements:

Iron	(Fe)	8 atoms
Molybdenum	(Mo)	2 atoms

The binding sites of Calcium atom in the Bovine Xanthine Oxidase, Protease Cleaved Form (pdb code 3ax7). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Bovine Xanthine Oxidase, Protease Cleaved Form, PDB code: 3ax7:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in the Bovine Xanthine Oxidase, Protease Cleaved Form


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Bovine Xanthine Oxidase, Protease Cleaved Form within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca1341 b:22.9 occ:1.00 OG A:SER874 2.7 23.3 1.0 O A:ASN908 2.7 19.9 1.0 O A:ALA867 2.7 21.4 1.0 O A:SER870 2.8 20.5 1.0 OG A:SER907 2.9 23.3 1.0 O A:ARG871 2.9 20.5 1.0 C A:ARG871 3.5 20.7 1.0 N A:ASN908 3.5 20.9 1.0 CB A:ASP872 3.7 20.4 1.0 C A:ALA867 3.7 21.1 1.0 C A:ASN908 3.8 20.4 1.0 C A:SER870 3.8 21.1 1.0 CB A:SER874 3.9 22.2 1.0 C A:SER907 4.0 20.8 1.0 CB A:SER907 4.1 20.4 1.0 CE1 A:HIS840 4.1 17.6 1.0 CB A:ALA867 4.1 20.4 1.0 CA A:ALA867 4.1 20.8 1.0 CA A:ASN908 4.2 21.1 1.0 N A:ASP872 4.2 20.6 1.0 CA A:SER907 4.2 21.2 1.0 CA A:ARG871 4.3 20.9 1.0 CA A:ASP872 4.5 20.4 1.0 N A:ARG871 4.5 21.1 1.0 NE2 A:HIS840 4.5 20.7 1.0 N A:SER874 4.5 21.9 1.0 OG A:SER870 4.6 21.8 1.0 CA A:SER874 4.7 22.4 1.0 CB A:ASN908 4.8 21.4 1.0 N A:GLY868 4.8 21.2 1.0 CG A:ASP872 4.9 20.9 1.0 O A:SER907 4.9 20.8 1.0 N A:LEU873 4.9 20.7 1.0 N A:SER870 4.9 21.5 1.0 CA A:SER870 4.9 21.2 1.0 C A:ASP872 4.9 20.6 1.0 N A:THR909 4.9 19.6 1.0

Calcium binding site 2 out of 2 in the Bovine Xanthine Oxidase, Protease Cleaved Form


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Bovine Xanthine Oxidase, Protease Cleaved Form within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca1340 b:24.1 occ:1.00 O B:SER870 2.6 22.0 1.0 OG B:SER874 2.6 20.4 1.0 OG B:SER907 2.6 24.9 1.0 O B:ASN908 2.7 21.3 1.0 O B:ALA867 2.8 21.7 1.0 O B:ARG871 2.9 21.5 1.0 C B:ARG871 3.4 21.6 1.0 N B:ASN908 3.6 21.6 1.0 C B:SER870 3.6 21.5 1.0 C B:ASN908 3.8 21.1 1.0 CB B:ASP872 3.8 21.4 1.0 C B:ALA867 3.8 21.0 1.0 CB B:SER874 3.9 21.7 1.0 CB B:SER907 3.9 22.2 1.0 CA B:ARG871 4.1 21.6 1.0 C B:SER907 4.1 21.8 1.0 CB B:ALA867 4.1 20.7 1.0 N B:ASP872 4.1 21.7 1.0 CA B:ALA867 4.2 20.4 1.0 CA B:ASN908 4.2 21.3 1.0 CA B:SER907 4.2 22.3 1.0 CE1 B:HIS840 4.3 18.3 1.0 N B:ARG871 4.3 21.6 1.0 CA B:ASP872 4.5 21.3 1.0 NE2 B:HIS840 4.6 18.3 1.0 N B:SER874 4.6 21.4 1.0 OG B:SER870 4.6 22.8 1.0 CB B:ASN908 4.7 21.6 1.0 CA B:SER870 4.7 21.7 1.0 N B:SER870 4.8 21.1 1.0 N B:LEU873 4.8 21.0 1.0 CA B:SER874 4.8 21.4 1.0 CG B:ASP872 4.9 22.4 1.0 C B:ASP872 4.9 21.2 1.0 N B:GLY868 4.9 21.3 1.0 OD1 B:ASP872 4.9 22.9 1.0 N B:THR909 4.9 19.6 1.0 O B:SER907 4.9 21.8 1.0

H.Ishikita, B.T.Eger, K.Okamoto, T.Nishino, E.F.Pai. Protein Conformational Gating of Enzymatic Activity in Xanthine Oxidoreductase J.Am.Chem.Soc. V. 134 999 2012.
ISSN: ISSN 0002-7863
PubMed: 22145797
DOI: 10.1021/JA207173P