Calcium in PDB 4pxg: Crystal Structure of Typeii Restriction Enzyme SAU3AI

All present enzymatic activity of Crystal Structure of Typeii Restriction Enzyme SAU3AI:
3.1.21.4;

The structure of Crystal Structure of Typeii Restriction Enzyme SAU3AI, PDB code: 4pxg was solved by C.Y.Xu, F.Yu, X.J.Hu, J.H.He, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	50.00 / 2.45
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	69.648, 197.673, 191.145, 90.00, 90.00, 90.00
R / Rfree (%)	22.4 / 26.3

The binding sites of Calcium atom in the Crystal Structure of Typeii Restriction Enzyme SAU3AI (pdb code 4pxg). 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 Crystal Structure of Typeii Restriction Enzyme SAU3AI, PDB code: 4pxg:

Calcium binding site 1 out of 1 in the Crystal Structure of Typeii Restriction Enzyme SAU3AI


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Crystal Structure of Typeii Restriction Enzyme SAU3AI within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca500 b:71.3 occ:1.00 OD1 A:ASP462 2.5 66.9 1.0 OD1 A:ASP463 2.7 48.0 1.0 CG A:ASP462 3.5 72.8 1.0 OD2 A:ASP462 3.8 63.0 1.0 CG A:ASP463 3.9 51.0 1.0 OD1 B:ASP380 3.9 56.9 1.0 NH2 A:ARG441 4.1 50.1 1.0 OD2 B:ASP380 4.2 51.2 1.0 N A:ASP463 4.4 48.6 1.0 CG B:ASP380 4.5 49.5 1.0 OD2 A:ASP463 4.6 62.0 1.0 NE A:ARG441 4.7 50.3 1.0 C A:ASP462 4.7 61.8 1.0 CB A:ASP462 4.8 71.7 1.0 CA A:ASP463 4.9 46.7 1.0 CG B:PRO377 4.9 39.5 1.0 OG A:SER461 4.9 62.5 1.0 CZ A:ARG441 4.9 51.8 1.0 CB A:ASP463 5.0 44.5 1.0

C.Y.Xu, F.Yu, X.J.Hu, J.H.He. The 2.45 A Crystal Structure of the Restriction Endonuclease SAU3AI Suggests A Self-Inhibition Mechanism To Be Published.