Silicon in PDB 7a9k: Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K

All present enzymatic activity of Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K:
3.4.21.64;

The structure of Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K, PDB code: 7a9k was solved by J.Breibeck, A.Rompel, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	43.56 / 1.62
Space group	P 43 21 2
Cell size a, b, c (Å), α, β, γ (°)	68.05, 68.05, 102.47, 90, 90, 90
R / Rfree (%)	13.1 / 16.6

The structure of Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K also contains other interesting chemical elements:

Cobalt	(Co)	2 atoms
Tungsten	(W)	22 atoms

The binding sites of Silicon atom in the Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K (pdb code 7a9k). This binding sites where shown within 5.0 Angstroms radius around Silicon atom.
In total 2 binding sites of Silicon where determined in the Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K, PDB code: 7a9k:
Jump to Silicon binding site number: 1; 2;

Silicon binding site 1 out of 2 in the Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K


Mono view


Stereo pair view

A full contact list of Silicon with other atoms in the Si binding site number 1 of Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K within 5.0Å range: probe atom residue distance (Å) B Occ A:Si302 b:79.7 occ:0.20 SI2 A:R5Q302 0.0 79.7 0.2 O59 A:R5Q302 1.6 83.3 0.2 O62 A:R5Q302 1.6 81.9 0.2 O61 A:R5Q302 1.6 76.2 0.2 O60 A:R5Q302 1.6 87.2 0.2 O76 A:R5Q302 3.2 71.2 0.2 O63 A:R5Q302 3.3 96.0 0.2 O75 A:R5Q302 3.3 68.8 0.2 CO1 A:R5Q302 3.3 66.9 0.2 O53 A:R5Q302 3.4 80.1 0.2 O68 A:R5Q302 3.4 70.7 0.2 O49 A:R5Q302 3.4 97.2 0.2 O64 A:R5Q302 3.4 96.5 0.2 O65 A:R5Q302 3.4 86.9 0.2 O66 A:R5Q302 3.5 69.9 0.2 O57 A:R5Q302 3.5 53.5 0.2 O67 A:R5Q302 3.5 50.6 0.2 W19 A:R5Q302 3.5 41.5 0.2 W17 A:R5Q302 3.5 79.7 0.2 W22 A:R5Q302 3.5 76.2 0.2 W20 A:R5Q302 3.5 91.1 0.2 W14 A:R5Q302 3.5 87.0 0.2 W21 A:R5Q302 3.5 75.5 0.2 O41 A:R5Q302 3.5 92.5 0.2 W16 A:R5Q302 3.6 81.1 0.2 W18 A:R5Q302 3.6 34.0 0.2 W12 A:R5Q302 3.6 89.7 0.2 W15 A:R5Q302 3.6 83.7 0.2 W13 A:R5Q302 3.7 78.5 0.2 O77 A:R5Q302 3.7 50.2 0.2 O69 A:R5Q302 3.8 80.3 0.2 O78 A:R5Q302 3.9 46.0 0.2 O73 A:R5Q302 3.9 64.0 0.2 O46 A:R5Q302 3.9 66.7 0.2 O47 A:R5Q302 3.9 87.1 0.2 O55 A:R5Q302 3.9 54.5 0.2 O71 A:R5Q302 4.0 81.4 0.2 O51 A:R5Q302 4.0 89.9 0.2 O45 A:R5Q302 4.0 87.1 0.2 O44 A:R5Q302 4.1 90.1 0.2 O43 A:R5Q302 4.1 96.0 0.2 OD2 A:ASP207 5.0 16.7 1.0

Silicon binding site 2 out of 2 in the Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K


Mono view


Stereo pair view

A full contact list of Silicon with other atoms in the Si binding site number 2 of Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K within 5.0Å range: probe atom residue distance (Å) B Occ A:Si303 b:4.8 occ:0.30 SI2 A:R5Q303 0.0 4.8 0.3 O59 A:R5Q303 1.6 5.1 0.3 O60 A:R5Q303 1.6 6.4 0.3 O62 A:R5Q303 1.6 6.0 0.3 O61 A:R5Q303 1.6 7.7 0.3 O75 A:R5Q303 3.2 6.8 0.3 O66 A:R5Q303 3.3 6.7 0.3 O68 A:R5Q303 3.3 7.8 0.3 O67 A:R5Q303 3.3 7.4 0.3 O76 A:R5Q303 3.3 7.4 0.3 O53 A:R5Q303 3.3 5.7 0.3 O57 A:R5Q303 3.3 5.6 0.3 O65 A:R5Q303 3.4 8.8 0.3 O63 A:R5Q303 3.4 7.6 0.3 O64 A:R5Q303 3.4 8.3 0.3 O49 A:R5Q303 3.4 6.1 0.3 O41 A:R5Q303 3.4 5.1 0.3 W19 A:R5Q303 3.5 7.2 0.3 W22 A:R5Q303 3.5 7.4 0.3 W12 A:R5Q303 3.5 7.4 0.3 W18 A:R5Q303 3.5 6.6 0.3 W21 A:R5Q303 3.5 7.6 0.3 W17 A:R5Q303 3.5 7.5 0.3 W16 A:R5Q303 3.5 7.6 0.3 CO1 A:R5Q303 3.6 9.0 0.3 W20 A:R5Q303 3.6 7.5 0.3 W14 A:R5Q303 3.6 7.3 0.3 W13 A:R5Q303 3.6 7.8 0.3 W15 A:R5Q303 3.6 8.0 0.3 O73 A:R5Q303 3.9 8.1 0.3 O55 A:R5Q303 3.9 10.9 0.3 O69 A:R5Q303 3.9 6.7 0.3 O46 A:R5Q303 3.9 6.8 0.3 O43 A:R5Q303 3.9 3.8 0.3 O78 A:R5Q303 3.9 11.4 0.3 O71 A:R5Q303 4.0 7.7 0.3 O47 A:R5Q303 4.0 5.3 0.3 O44 A:R5Q303 4.0 6.0 0.3 O51 A:R5Q303 4.0 10.9 0.3 O77 A:R5Q303 4.0 6.4 0.3 O45 A:R5Q303 4.0 10.1 0.3

J.Breibeck, A.Rompel. Co-Substituted Keggin Silicotungstate with Covalent Bond to Proteinase K To Be Published.