Calcium in PDB 6kqu: Crystal Structure of Phospholipase A2

All present enzymatic activity of Crystal Structure of Phospholipase A2:
3.1.1.4;

The structure of Crystal Structure of Phospholipase A2, PDB code: 6kqu was solved by S.Hou, T.Xu, J.Liu, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	18.80 / 2.00
Space group	P 21 2 2
Cell size a, b, c (Å), α, β, γ (°)	48.839, 61.117, 63.404, 90.00, 90.00, 90.00
R / Rfree (%)	19.7 / 23.9

The structure of Crystal Structure of Phospholipase A2 also contains other interesting chemical elements:

Chlorine	(Cl)	6 atoms
Sodium	(Na)	1 atom

The binding sites of Calcium atom in the Crystal Structure of Phospholipase A2 (pdb code 6kqu). 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 Phospholipase A2, PDB code: 6kqu:

Calcium binding site 1 out of 1 in the Crystal Structure of Phospholipase A2


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 Phospholipase A2 within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca210 b:19.4 occ:0.62 O A:TYR26 2.2 11.1 1.0 O A:GLY30 2.3 26.7 1.0 OD2 A:ASP47 2.4 15.7 1.0 O A:GLY28 2.4 22.8 0.5 O A:GLY28 2.5 22.7 0.5 OD1 A:ASP47 2.7 14.9 1.0 CG A:ASP47 2.9 14.4 1.0 C A:TYR26 3.4 12.4 1.0 C A:GLY30 3.4 27.1 1.0 C A:GLY28 3.5 24.4 0.5 C A:GLY28 3.5 24.3 0.5 N A:GLY30 3.6 32.1 1.0 O A:HOH346 3.9 25.1 1.0 O A:HOH316 4.0 37.9 1.0 N A:GLY28 4.0 19.7 0.5 CA A:GLY30 4.0 28.7 1.0 C A:ILE29 4.0 30.9 1.0 N A:GLY28 4.1 19.7 0.5 CA A:TYR26 4.1 12.7 1.0 N A:CYS27 4.4 12.9 1.0 CA A:GLY28 4.4 22.6 0.5 N A:ILE29 4.4 27.2 1.0 CB A:ASP47 4.4 12.8 1.0 CA A:ILE29 4.4 30.6 1.0 CA A:GLY28 4.4 22.5 0.5 C A:CYS27 4.5 17.7 1.0 N A:GLY31 4.5 26.2 1.0 O A:HOH307 4.6 15.2 1.0 CA A:CYS27 4.6 14.5 1.0 O A:ILE29 4.6 31.9 1.0 CB A:TYR26 4.6 12.8 1.0 CA A:GLY31 4.8 26.7 1.0 O A:HOH311 4.8 20.1 1.0 O A:CYS43 4.8 11.0 1.0 CD2 A:TYR26 4.9 14.6 1.0

S.Hou, Y.Zhang, J.Xu, J.Bai, J.Liu, J.Xie, T.Xu. Residue ASN21 Acts As A Switch For Calcium Binding to Modulate the Enzymatic Activity of Human Phospholipase A2 Group Iie. Biochimie V. 176 117 2020.
ISSN: ISSN 0300-9084
PubMed: 32659444
DOI: 10.1016/J.BIOCHI.2020.07.003