Sodium in the structure of Structure of Inorganic Pyrophosphatase (pdb 1i40)

The binding sites of Sodium atom in the structure of Structure of Inorganic Pyrophosphatase (pdb code 1i40). This binding sites where shown with 5.0 Angstroms radius around Sodium atom. The 1i40 structure was solved by V.R.SAMYGINA, A.N.POPOV, V.S.LAMZIN, S.M.AVAEVA, with X-Ray Crystallography technique, brief refinement statistics is given in the table below: Resolution (A) 12.0-1.1 Space group H32 a (A) 109.520 b (A) 109.520 c (A) 75.080 alpha (°) 90.00 beta (°) 90.00 gamma (°) 120.00 Rfactor (%) 11.7 Rfree (%) 15.3 Sodium Binding Sites: Sodium binding site 1 out of 1 in 1i40 Click to enlarge Click to enlarge Mono- and Stereo- picture of 5.0 Angstrom coordination sphere 1 of Sodium in the PDB 1i40. Coordination sphere was calculated for all residues within 5.0 Angstroms distance from the central Sodium atom, shown by VdW sphere Residues shown as a stick model or VDW spheres: A: Lys142, A: Asp143, A: Leu144, A: Glu145, A: Lys146, A: Gly147, A: Lys148, A: Trp149, A: Hoh342, A: Hoh352, A: Hoh396, A: Hoh408, A: Hoh413, conact list: Atom Atom Distance (A) Na O A:Lys142 2.44 Na CB A:Lys142 4.45 Na CB A:Lys142 4.34 Na C A:Lys142 3.60 Na CA A:Lys142 4.58 Na O A:Asp143 4.06 Na N A:Asp143 4.40 Na C A:Asp143 4.07 Na CA A:Asp143 4.27 Na N A:Leu144 4.55 Na C A:Leu144 4.69 Na O A:Glu145 2.31 Na N A:Glu145 3.82 Na CB A:Glu145 4.40 Na C A:Glu145 3.30 Na CA A:Glu145 4.04 Na O A:Lys146 4.01 Na N A:Lys146 4.25 Na N A:Lys146 4.29 Na C A:Lys146 4.82 Na C A:Lys146 4.31 Na CA A:Lys146 4.42 Na CA A:Lys146 4.52 Na N A:Gly147 4.72 Na O A:Lys148 2.34 Na N A:Lys148 4.20 Na C A:Lys148 3.52 Na CA A:Lys148 4.48 Na N A:Trp149 4.38 Na CB A:Trp149 4.45 Na CA A:Trp149 4.36 Na O A:Hoh342 2.73 Na O A:Hoh352 2.45 Na O A:Hoh396 4.93 Na O A:Hoh408 4.53 Na O A:Hoh413 2.61 interactive model: