Calcium in PDB 3u43: Crystal Structure of the Colicin E2 Dnase-IM2 Complex

The structure of Crystal Structure of the Colicin E2 Dnase-IM2 Complex, PDB code: 3u43 was solved by J.A.Wojdyla, C.Kleanthous, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	48.81 / 1.72
Space group	P 21 21 2
Cell size a, b, c (Å), α, β, γ (°)	121.814, 53.277, 32.785, 90.00, 90.00, 90.00
R / Rfree (%)	16.2 / 20.3

The structure of Crystal Structure of the Colicin E2 Dnase-IM2 Complex also contains other interesting chemical elements:

Zinc

(Zn)

1 atom

The binding sites of Calcium atom in the Crystal Structure of the Colicin E2 Dnase-IM2 Complex (pdb code 3u43). 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 Crystal Structure of the Colicin E2 Dnase-IM2 Complex, PDB code: 3u43:

Calcium binding site 1 out of 1 in the Crystal Structure of the Colicin E2 Dnase-IM2 Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Crystal Structure of the Colicin E2 Dnase-IM2 Complex within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca136 b:24.2 occ:1.00 O B:HOH221 2.8 38.7 1.0 NE B:ARG54 3.1 11.9 1.0 N B:LEU101 3.1 10.9 1.0 O B:HOH254 3.3 9.4 1.0 O B:HOH256 3.6 14.1 1.0 CD B:ARG54 3.7 10.6 1.0 CA B:GLU100 3.7 10.2 1.0 C B:GLU100 3.9 10.2 1.0 CB B:LEU101 4.0 10.8 1.0 CA B:LEU101 4.1 10.4 1.0 O B:LEU101 4.2 14.5 1.0 CZ B:ARG54 4.2 9.9 1.0 CB B:GLU100 4.2 10.8 1.0 CG B:LEU101 4.2 9.8 1.0 NH2 B:ARG54 4.4 9.9 1.0 CG B:ARG54 4.4 9.6 1.0 O B:PHE99 4.6 10.1 1.0 C B:LEU101 4.7 11.1 1.0 CG B:GLU100 4.8 14.2 1.0 N B:GLU100 4.9 8.7 1.0 CD1 B:LEU101 4.9 10.2 1.0

J.A.Wojdyla, S.J.Fleishman, D.Baker, C.Kleanthous. Structure of the Ultra-High-Affinity Colicin E2 Dnase-IM2 Complex. J.Mol.Biol. V. 417 79 2012.
ISSN: ISSN 0022-2836
PubMed: 22306467
DOI: 10.1016/J.JMB.2012.01.019