Potassium in PDB 2x21: Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A

The structure of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A, PDB code: 2x21 was solved by T.Schulte, R.G.Hiller, E.Hofmann, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	43.01 / 1.75
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	68.490, 81.810, 74.980, 90.00, 90.00, 90.00
R / Rfree (%)	14.6 / 18.6

The structure of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A also contains other interesting chemical elements:

Magnesium	(Mg)	1 atom
Cadmium	(Cd)	8 atoms
Chlorine	(Cl)	7 atoms
Sodium	(Na)	1 atom

The binding sites of Potassium atom in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A (pdb code 2x21). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 4 binding sites of Potassium where determined in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A, PDB code: 2x21:
Jump to Potassium binding site number: 1; 2; 3; 4;

Potassium binding site 1 out of 4 in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A within 5.0Å range: probe atom residue distance (Å) B Occ M:K1165 b:25.2 occ:1.00 O M:HOH2082 2.4 31.7 1.0 O M:HOH2160 2.4 29.8 1.0 O M:HOH2083 2.6 35.5 1.0 O M:HOH2115 2.9 39.2 1.0 O M:HOH2159 4.2 29.5 1.0 O M:SER98 4.3 11.5 1.0 O M:ALA53 4.5 11.4 1.0 OD2 M:ASP55 4.7 27.8 1.0 CB M:ASP55 4.7 10.8 1.0 CA M:ASP55 4.7 10.0 1.0 N M:ASP55 4.9 10.0 1.0

Potassium binding site 2 out of 4 in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A within 5.0Å range: probe atom residue distance (Å) B Occ M:K1166 b:39.5 occ:1.00 OE2 M:GLU101 2.6 19.2 1.0 OE1 M:GLU101 2.6 21.7 1.0 CD M:GLU101 2.9 21.8 1.0 NZ M:LYS147 3.4 40.2 1.0 CE M:LYS147 3.5 38.4 1.0 O2 M:PID614 4.4 19.6 1.0 CG M:GLU101 4.5 13.1 1.0 CD M:LYS147 4.8 31.7 1.0 O M:HOH2226 4.9 29.0 1.0

Potassium binding site 3 out of 4 in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 3 of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A within 5.0Å range: probe atom residue distance (Å) B Occ M:K1167 b:46.0 occ:1.00 NZ M:LYS68 2.3 35.5 1.0 OD2 M:ASP84 2.6 13.1 1.0 O M:HOH2136 2.8 34.2 1.0 O M:HOH2143 2.9 30.9 1.0 OD1 M:ASP84 3.2 20.8 1.0 CG M:ASP84 3.3 13.9 1.0 O M:HOH2135 3.4 28.4 1.0 CE M:LYS68 3.7 32.5 1.0 CG M:LYS68 3.7 20.6 1.0 CD M:LYS68 4.1 32.3 1.0 CB M:SER72 4.1 13.3 1.0 OG M:SER72 4.3 16.8 1.0 O M:LYS68 4.4 8.5 1.0 OG M:SER81 4.5 11.5 1.0 O M:HOH2153 4.6 34.7 1.0 CB M:ASP84 4.7 8.0 1.0 C M:LYS68 5.0 9.8 1.0

Potassium binding site 4 out of 4 in the Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 4 of Structure of Peridinin-Chlorophyll-Protein Reconstituted with Bchl-A within 5.0Å range: probe atom residue distance (Å) B Occ M:K1168 b:28.1 occ:1.00 CL M:CL1163 1.7 26.3 0.5 O M:HOH2204 2.3 27.4 1.0 OE2 M:GLU133 2.5 24.0 1.0 CD M:GLU133 3.2 24.9 1.0 OE1 M:GLU133 3.3 28.6 1.0 NZ M:LYS124 4.3 24.3 1.0 CG M:GLU133 4.6 11.0 1.0 CE M:LYS124 4.9 16.9 1.0 O M:HOH2205 5.0 39.5 1.0

T.Schulte, R.G.Hiller, E.Hofmann. X-Ray Structures of the Peridinin-Chlorophyll-Protein Reconstituted with Different Chlorophylls. Febs Lett. V. 584 973 2010.
ISSN: ISSN 0014-5793
PubMed: 20102711
DOI: 10.1016/J.FEBSLET.2010.01.041