Calcium in PDB 1iqk: Human Coagulation Factor Xa in Complex with M55113

All present enzymatic activity of Human Coagulation Factor Xa in Complex with M55113:
3.4.21.6;

The structure of Human Coagulation Factor Xa in Complex with M55113, PDB code: 1iqk was solved by I.Shiromizu, T.Matsusue, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	8.00 / 3.20
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	71.960, 78.920, 56.140, 90.00, 90.00, 90.00
R / Rfree (%)	n/a / n/a

The structure of Human Coagulation Factor Xa in Complex with M55113 also contains other interesting chemical elements:

Chlorine

(Cl)

1 atom

The binding sites of Calcium atom in the Human Coagulation Factor Xa in Complex with M55113 (pdb code 1iqk). 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 Human Coagulation Factor Xa in Complex with M55113, PDB code: 1iqk:

Calcium binding site 1 out of 1 in the Human Coagulation Factor Xa in Complex with M55113


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Human Coagulation Factor Xa in Complex with M55113 within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca301 b:2.0 occ:1.00 OE1 A:GLU80 2.7 10.9 1.0 OD1 A:ASP70 2.8 16.4 1.0 O A:ASN72 2.8 16.4 1.0 OE1 A:GLU77 2.9 31.0 1.0 OE2 A:GLU77 3.1 31.3 1.0 CG A:ASP70 3.2 13.2 1.0 OD2 A:ASP70 3.3 10.6 1.0 CD A:GLU77 3.4 33.0 1.0 CD A:GLU80 3.5 11.9 1.0 C A:ASN72 3.6 14.5 1.0 CG A:GLU80 3.7 10.2 1.0 O A:GLN75 3.9 36.5 1.0 OE1 A:GLU76 4.1 47.0 1.0 N A:ASN72 4.1 6.3 1.0 C A:GLN75 4.1 36.9 1.0 CA A:GLU76 4.2 38.4 1.0 N A:GLU76 4.3 38.0 1.0 CB A:ASP70 4.3 10.2 1.0 N A:THR73 4.4 17.6 1.0 CA A:ASN72 4.4 10.6 1.0 N A:GLU77 4.4 35.8 1.0 CA A:THR73 4.5 19.2 1.0 N A:GLN75 4.6 31.0 1.0 N A:ARG71 4.6 4.8 1.0 CD A:GLU76 4.6 47.8 1.0 CA A:ASP70 4.7 6.2 1.0 N A:GLU74 4.7 23.4 1.0 OE2 A:GLU80 4.7 9.7 1.0 CB A:ASN72 4.7 10.1 1.0 OE2 A:GLU76 4.8 47.3 1.0 CG A:GLU77 4.9 32.5 1.0 C A:GLU76 4.9 36.5 1.0 CA A:GLN75 4.9 35.4 1.0

T.Matsusue, I.Shiromizu, A.Okamoto, K.Nakayama, H.Nishida, T.Mukaihira, Y.Miyazaki, F.Saitou, H.Morishita, S.Ohnishi, H.Mochizuki. Factor Xa Specific Inhibitor That Induces the Novel Binding Model in Complex with Human Fxa To Be Published.