Potassium in PDB 4x3k: Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide

The structure of Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide, PDB code: 4x3k was solved by C.Ren, M.M.Zhou, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	30.71 / 1.45
Space group	P 1 21 1
Cell size a, b, c (Å), α, β, γ (°)	45.460, 33.230, 46.160, 90.00, 95.80, 90.00
R / Rfree (%)	18.9 / 23.2

The structure of Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide also contains other interesting chemical elements:

Nickel

(Ni)

2 atoms

The binding sites of Potassium atom in the Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide (pdb code 4x3k). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total only one binding site of Potassium was determined in the Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide, PDB code: 4x3k:

Potassium binding site 1 out of 1 in the Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Crystal Structure of Chromobox Homolog 7 (CBX7) Chromodomain with H3K27ME3 Peptide within 5.0Å range: probe atom residue distance (Å) B Occ B:K102 b:8.0 occ:1.00 OE1 B:GLU58 1.9 14.9 1.0 OE2 B:GLU62 2.0 14.8 1.0 OE1 B:GLU61 2.0 17.4 1.0 NZ B:LYS19 2.1 11.7 1.0 CD B:GLU58 2.6 12.8 1.0 OE2 B:GLU58 2.8 13.4 1.0 CD B:GLU61 2.9 15.1 1.0 CD B:GLU62 3.0 18.0 1.0 OE2 B:GLU61 3.1 17.5 1.0 CE B:LYS19 3.2 12.7 1.0 CD B:LYS19 3.4 12.7 1.0 CG B:GLU62 3.5 18.1 1.0 O B:HOH203 3.6 28.1 1.0 CG B:GLU58 4.0 12.0 1.0 OE1 B:GLU62 4.0 18.0 1.0 O B:HOH228 4.1 19.4 1.0 CG B:GLU61 4.2 16.9 1.0 CB B:GLU58 4.4 11.9 1.0 CA B:GLU58 4.6 11.2 1.0 CB B:GLU61 4.6 14.6 1.0 O B:GLU58 4.6 14.1 1.0 N B:GLU62 4.6 13.9 1.0 CB B:GLU62 4.8 17.6 1.0 CG B:LYS19 4.9 9.8 1.0 CA B:GLU62 4.9 15.1 1.0

C.Ren, K.Morohashi, A.N.Plotnikov, J.Jakoncic, S.G.Smith, J.Li, L.Zeng, Y.Rodriguez, V.Stojanoff, M.Walsh, M.M.Zhou. Small-Molecule Modulators of Methyl-Lysine Binding For the CBX7 Chromodomain. Chem.Biol. V. 22 161 2015.
ISSN: ISSN 1074-5521
PubMed: 25660273
DOI: 10.1016/J.CHEMBIOL.2014.11.021