Calcium in PDB 2i1q: Rada Recombinase in Complex with Calcium

The structure of Rada Recombinase in Complex with Calcium, PDB code: 2i1q was solved by X.Qian, Y.He, X.Ma, M.N.Fodje, P.Grochulski, Y.Luo, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	20.00 / 1.90
Space group	P 61
Cell size a, b, c (Å), α, β, γ (°)	84.200, 84.200, 104.700, 90.00, 90.00, 120.00
R / Rfree (%)	19.1 / 21.1

The structure of Rada Recombinase in Complex with Calcium also contains other interesting chemical elements:

Magnesium	(Mg)	1 atom
Sodium	(Na)	1 atom

The binding sites of Calcium atom in the Rada Recombinase in Complex with Calcium (pdb code 2i1q). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 3 binding sites of Calcium where determined in the Rada Recombinase in Complex with Calcium, PDB code: 2i1q:
Jump to Calcium binding site number: 1; 2; 3;

Calcium binding site 1 out of 3 in the Rada Recombinase in Complex with Calcium


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Rada Recombinase in Complex with Calcium within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca502 b:20.3 occ:1.00 O A:GLN98 2.3 13.9 1.0 O A:HOH606 2.3 22.1 1.0 OD1 A:ASP246 2.3 24.0 1.0 O A:HOH604 2.3 14.4 1.0 O A:HOH605 2.3 20.2 1.0 O A:HOH607 2.3 28.9 1.0 CG A:ASP246 3.0 22.7 1.0 OD2 A:ASP246 3.1 23.8 1.0 C A:GLN98 3.4 14.9 1.0 N A:SER99 4.2 14.9 1.0 CA A:GLN98 4.2 14.7 1.0 O A:HOH720 4.3 26.8 1.0 CA A:SER99 4.3 15.7 1.0 O A:HOH690 4.4 21.8 1.0 CB A:GLN98 4.4 14.4 1.0 OG A:SER99 4.5 18.2 1.0 CB A:ASP246 4.5 21.7 1.0 OD1 A:ASN242 4.5 17.2 1.0 O A:ASN242 4.5 17.8 1.0 O A:HOH693 4.7 28.9 1.0

Calcium binding site 2 out of 3 in the Rada Recombinase in Complex with Calcium


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Rada Recombinase in Complex with Calcium within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca503 b:22.0 occ:1.00 O A:HOH650 2.3 24.8 1.0 O3G A:ANP401 2.5 18.0 1.0 O A:HOH624 2.5 22.2 1.0 O A:HOH641 2.7 30.1 1.0 PG A:ANP401 3.6 18.8 1.0 O2G A:ANP401 3.8 18.6 1.0 N3B A:ANP401 4.6 17.2 1.0 O1G A:ANP401 4.6 19.9 1.0 CB A:PHE107 4.9 18.1 1.0

Calcium binding site 3 out of 3 in the Rada Recombinase in Complex with Calcium


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 3 of Rada Recombinase in Complex with Calcium within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca504 b:19.7 occ:1.00 O3' A:ANP401 2.4 19.0 1.0 O A:HOH668 2.5 21.3 1.0 O A:HOH659 2.5 22.3 1.0 O2' A:ANP401 2.7 20.4 1.0 C3' A:ANP401 3.3 19.0 1.0 C2' A:ANP401 3.5 18.9 1.0 NH2 A:ARG296 4.2 33.6 1.0 C4' A:ANP401 4.3 18.4 1.0 O A:HOH692 4.5 37.7 1.0 O A:HOH646 4.6 10.2 1.0 O A:HOH669 4.7 22.9 1.0 C1' A:ANP401 4.8 18.9 1.0 O A:GLY108 5.0 18.7 1.0

X.Qian, Y.He, X.Ma, M.N.Fodje, P.Grochulski, Y.Luo. Calcium Stiffens Archaeal RAD51 Recombinase From Methanococcus Voltae For Homologous Recombination. J.Biol.Chem. V. 281 39380 2006.
ISSN: ISSN 0021-9258
PubMed: 17050545
DOI: 10.1074/JBC.M607785200