Calcium in PDB 1iqi: Human Coagulation Factor Xa in Complex with M55125

All present enzymatic activity of Human Coagulation Factor Xa in Complex with M55125:
3.4.21.6;

The structure of Human Coagulation Factor Xa in Complex with M55125, PDB code: 1iqi 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 / 2.90
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	72.360, 78.230, 56.320, 90.00, 90.00, 90.00
R / Rfree (%)	n/a / n/a

The structure of Human Coagulation Factor Xa in Complex with M55125 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 M55125 (pdb code 1iqi). 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 M55125, PDB code: 1iqi:

Calcium binding site 1 out of 1 in the Human Coagulation Factor Xa in Complex with M55125


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 M55125 within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca301 b:34.4 occ:1.00 O A:ASN72 2.9 51.0 1.0 OE2 A:GLU80 3.0 41.8 1.0 OD1 A:ASP70 3.2 54.5 1.0 OE2 A:GLU77 3.2 59.4 1.0 OD2 A:ASP70 3.2 41.9 1.0 CG A:ASP70 3.3 42.6 1.0 CD A:GLU80 3.3 42.5 1.0 N A:GLU77 3.4 67.5 1.0 CG A:GLU77 3.4 64.2 1.0 CG A:GLU80 3.5 42.0 1.0 O A:GLN75 3.5 70.4 1.0 CD A:GLU77 3.8 62.4 1.0 CA A:GLU76 3.9 67.6 1.0 C A:ASN72 4.0 46.0 1.0 OE2 A:GLU76 4.0 85.6 1.0 CB A:GLU77 4.1 66.7 1.0 C A:GLN75 4.1 68.0 1.0 OE1 A:GLU80 4.1 48.0 1.0 C A:GLU76 4.2 66.2 1.0 N A:GLU76 4.3 68.9 1.0 CB A:ASP70 4.3 33.9 1.0 CA A:GLU77 4.4 65.6 1.0 N A:ASN72 4.4 33.7 1.0 CA A:ASP70 4.5 26.7 1.0 CA A:ASN72 4.6 42.5 1.0 N A:ARG71 4.7 28.8 1.0 CB A:ASN72 4.7 44.4 1.0 CD A:GLU76 4.9 81.2 1.0 N A:THR73 4.9 44.5 1.0 CB A:GLU80 5.0 37.5 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.