Calcium in PDB 6y44: 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide

The structure of 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide, PDB code: 6y44 was solved by A.Ballone, R.A.Lau, F.P.A.Zweipfenning, C.Ottmann, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	29.81 / 1.71
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	81.769, 111.627, 62.792, 90.00, 90.00, 90.00
R / Rfree (%)	17.4 / 20.2

The structure of 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide also contains other interesting chemical elements:

Magnesium	(Mg)	3 atoms
Chlorine	(Cl)	4 atoms

The binding sites of Calcium atom in the 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide (pdb code 6y44). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total only one binding site of Calcium was determined in the 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide, PDB code: 6y44:

Calcium binding site 1 out of 1 in the 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of 14-3-3 Sigma in Complex with Phosphorylated SOS1 Peptide within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca307 b:35.5 occ:0.00 O A:HOH531 2.3 40.4 1.0 OE2 A:GLU188 2.6 36.7 1.0 CD A:GLU188 3.6 36.4 1.0 CG A:GLU188 4.0 32.5 1.0 O A:HOH608 4.4 38.8 1.0 OE1 A:GLU188 4.7 38.3 1.0

A.Ballone, R.A.Lau, F.P.A.Zweipfenning, C.Ottmann. A New Soaking Procedure For X-Ray Crystallographic Structural Determination of Protein-Peptide Complexes. Acta Crystallogr.,Sect.F V. 76 501 2020.
ISSN: ESSN 2053-230X
PubMed: 33006579
DOI: 10.1107/S2053230X2001122X