Potassium in the structure of Photosynthetic Reaction Center From Rhodobacter Sphaeroides 2.4.1 (pdb 3i4d)

The binding sites of Potassium atom in the structure of Photosynthetic Reaction Center From Rhodobacter Sphaeroides 2.4.1 (pdb code 3i4d). This binding sites where shown with 5.0 Angstroms radius around Potassium atom. The 3i4d structure was solved by R.FUJII, S.ADACHI, A.W.ROSZAK, A.T.GARDINER, R.J.COGDELL, N.W.ISAACS, S.KOSHIHARA, H.HASHIMOTO, with X-Ray Crystallography technique, brief refinement statistics is given in the table below: Resolution (A) 30.2-2.0 Space group P3121 a (A) 138.800 b (A) 138.800 c (A) 184.569 alpha (°) 90.00 beta (°) 90.00 gamma (°) 120.00 Rfactor (%) 18.1 Rfree (%) 20.7 Potassium Binding Sites: Potassium binding site 1 out of 2 in 3i4d Click to enlarge Click to enlarge Mono- and Stereo- picture of 5.0 Angstrom coordination sphere 1 of Potassium in the PDB 3i4d. Coordination sphere was calculated for all residues within 5.0 Angstroms distance from the central Potassium atom, shown by VdW sphere Residues shown as a stick model or VDW spheres: M: Val192, M: His193, M: Asp292, M: Asn293, M: Hoh366, conact list: Atom Atom Distance (A) K O M:Val192 2.81 K C M:Val192 4.01 K CG1 M:Val192 4.96 K N M:His193 4.78 K CA M:His193 4.53 K O M:Asp292 2.84 K CB M:Asp292 4.12 K C M:Asp292 3.79 K CA M:Asp292 4.47 K N M:Asn293 4.64 K CB M:Asn293 4.37 K ND2 M:Asn293 4.45 K CG M:Asn293 4.86 K CA M:Asn293 4.68 K O M:Hoh366 3.12 interactive model: Potassium binding site 2 out of 2 in 3i4d Click to enlarge Click to enlarge Mono- and Stereo- picture of 5.0 Angstrom coordination sphere 2 of Potassium in the PDB 3i4d. Coordination sphere was calculated for all residues within 5.0 Angstroms distance from the central Potassium atom, shown by VdW sphere Residues shown as a stick model or VDW spheres: H: Met134, H: Lys135, H: Ala136, H: Ala137, H: Ala138, H: Gly139, H: Phe140, H: Hoh313, H: Hoh336, H: Hoh337, H: Hoh338, H: Hoh401, conact list: Atom Atom Distance (A) K O H:Met134 2.72 K C H:Met134 3.85 K CG H:Met134 4.31 K CA H:Met134 4.86 K O H:Lys135 4.42 K O H:Lys135 4.33 K N H:Lys135 4.58 K N H:Lys135 4.55 K C H:Lys135 4.39 K C H:Lys135 4.33 K CA H:Lys135 4.42 K CA H:Lys135 4.30 K N H:Ala136 4.90 K O H:Ala137 2.82 K N H:Ala137 4.26 K C H:Ala137 3.73 K CB H:Ala137 4.69 K CA H:Ala137 4.48 K N H:Ala138 4.57 K C H:Ala138 4.65 K CA H:Ala138 4.60 K N H:Gly139 4.15 K C H:Gly139 4.60 K CA H:Gly139 4.88 K O H:Phe140 2.87 K N H:Phe140 3.82 K CB H:Phe140 4.30 K C H:Phe140 3.85 K CA H:Phe140 4.15 K O H:Hoh313 4.11 K O H:Hoh336 2.99 K O H:Hoh337 3.17 K O H:Hoh338 2.91 K O H:Hoh401 4.35 interactive model: