Calcium in PDB 1ptk: Studies on the Inhibitory Action of Mercury Upon Proteinase K

All present enzymatic activity of Studies on the Inhibitory Action of Mercury Upon Proteinase K:
3.4.21.64;

The structure of Studies on the Inhibitory Action of Mercury Upon Proteinase K, PDB code: 1ptk was solved by A.Mueller, W.Saenger, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	8.00 / 2.40
Space group	P 43 21 2
Cell size a, b, c (Å), α, β, γ (°)	68.360, 68.360, 108.410, 90.00, 90.00, 90.00
R / Rfree (%)	n/a / n/a

The structure of Studies on the Inhibitory Action of Mercury Upon Proteinase K also contains other interesting chemical elements:

Mercury

(Hg)

3 atoms

The binding sites of Calcium atom in the Studies on the Inhibitory Action of Mercury Upon Proteinase K (pdb code 1ptk). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total only one binding site of Calcium was determined in the Studies on the Inhibitory Action of Mercury Upon Proteinase K, PDB code: 1ptk:

Calcium binding site 1 out of 1 in the Studies on the Inhibitory Action of Mercury Upon Proteinase K


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Studies on the Inhibitory Action of Mercury Upon Proteinase K within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca281 b:18.6 occ:1.00 OD2 A:ASP200 2.4 18.4 1.0 O A:VAL177 2.4 14.7 1.0 O A:PRO175 2.4 17.1 1.0 O A:HOH284 2.5 5.0 1.0 O A:HOH321 2.6 15.4 1.0 OD1 A:ASP200 2.8 38.4 1.0 CG A:ASP200 2.9 5.0 1.0 O A:HOH374 3.1 21.4 1.0 O A:HOH394 3.1 33.1 1.0 C A:PRO175 3.4 5.5 1.0 C A:VAL177 3.7 17.1 1.0 CA A:PRO175 4.0 5.0 1.0 N A:VAL177 4.2 14.6 1.0 O A:VAL198 4.2 17.0 1.0 O A:HOH383 4.3 46.7 1.0 CB A:ASP200 4.4 19.9 1.0 C A:SER176 4.4 8.5 1.0 O A:GLU174 4.4 12.6 1.0 N A:SER176 4.5 5.4 1.0 CA A:VAL177 4.5 5.0 1.0 CA A:CYS178 4.6 7.8 1.0 N A:CYS178 4.6 5.2 1.0 N A:THR179 4.6 11.9 1.0 OG1 A:THR179 4.7 7.6 1.0 CA A:SER176 4.8 5.0 1.0 CB A:PRO175 4.9 8.1 1.0 O A:HOH399 4.9 47.1 1.0 O A:HOH366 4.9 38.0 1.0 SG A:CYS249 5.0 10.5 1.0 O A:SER176 5.0 12.5 1.0

A.Muller, W.Saenger. Studies on the Inhibitory Action of Mercury Upon Proteinase K. J.Biol.Chem. V. 268 26150 1993.
ISSN: ISSN 0021-9258
PubMed: 8253733