Potassium in PDB 4kax: Crystal Structure of the GRP1 pH Domain in Complex with ARF6-Gtp

The structure of Crystal Structure of the GRP1 pH Domain in Complex with ARF6-Gtp, PDB code: 4kax was solved by D.G.Lambright, A.W.Malaby, B.Van Den Berg, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	20.00 / 1.85
Space group	P 43 21 2
Cell size a, b, c (Å), α, β, γ (°)	56.595, 56.595, 274.371, 90.00, 90.00, 90.00
R / Rfree (%)	20 / 23.5

The structure of Crystal Structure of the GRP1 pH Domain in Complex with ARF6-Gtp also contains other interesting chemical elements:

Magnesium

(Mg)

1 atom

The binding sites of Potassium atom in the Crystal Structure of the GRP1 pH Domain in Complex with ARF6-Gtp (pdb code 4kax). 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 the GRP1 pH Domain in Complex with ARF6-Gtp, PDB code: 4kax:

Potassium binding site 1 out of 1 in the Crystal Structure of the GRP1 pH Domain in Complex with ARF6-Gtp


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 the GRP1 pH Domain in Complex with ARF6-Gtp within 5.0Å range: probe atom residue distance (Å) B Occ A:K205 b:29.3 occ:1.00 O B:GLY348 2.6 33.1 1.0 O A:HOH364 2.7 37.2 1.0 O B:HOH1281 2.8 39.3 1.0 O A:HOH359 2.8 29.3 1.0 O A:HIS76 2.9 23.3 1.0 OG1 A:THR79 2.9 28.4 1.0 C B:GLY348 3.6 33.6 1.0 C A:HIS76 3.8 23.3 1.0 O B:HOH1345 3.9 40.7 1.0 CB A:THR79 3.9 28.0 1.0 O B:HOH1421 4.0 54.2 1.0 CA B:GLY348 4.1 34.6 1.0 CA A:HIS76 4.3 22.7 1.0 ND1 A:HIS76 4.3 22.7 1.0 O B:HOH1357 4.4 36.6 1.0 N A:THR79 4.6 27.4 1.0 O A:ARG75 4.6 22.2 1.0 N B:ARG349 4.7 32.7 1.0 CE1 A:HIS76 4.8 23.1 1.0 OE1 A:GLU111 4.8 34.2 1.0 CA A:THR79 4.9 28.1 1.0 OE2 A:GLU111 4.9 32.5 1.0 CG A:HIS76 4.9 22.8 1.0 CG2 A:THR79 4.9 27.8 1.0 CG2 B:VAL350 4.9 28.8 1.0 N A:TYR77 5.0 23.2 1.0

A.W.Malaby, B.Van Den Berg, D.G.Lambright. Structural Basis For Membrane Recruitment and Allosteric Activation of Cytohesin Family Arf Gtpase Exchange Factors. Proc.Natl.Acad.Sci.Usa V. 110 14213 2013.
ISSN: ISSN 0027-8424
PubMed: 23940353
DOI: 10.1073/PNAS.1301883110