Calcium in PDB 8aci: Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH

The structure of Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH, PDB code: 8aci was solved by H.G.Olesen, G.R.Andersen, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	44.16 / 1.85
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	71.59, 88.76, 144.78, 90, 90, 90
R / Rfree (%)	18.7 / 19.9

The structure of Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH also contains other interesting chemical elements:

Chlorine

(Cl)

1 atom

The binding sites of Calcium atom in the Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH (pdb code 8aci). 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 Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH, PDB code: 8aci:

Calcium binding site 1 out of 1 in the Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Structure of Arg-117 Fab in Complex with A Fragment of Complement C2, Neutral pH within 5.0Å range: probe atom residue distance (Å) B Occ H:Ca301 b:39.6 occ:1.00 OD1 H:ASP103 2.2 37.9 1.0 OE1 H:GLU99 2.2 37.2 1.0 O H:HOH447 2.4 37.3 1.0 O A:ARG103 2.4 32.8 1.0 O H:HOH432 2.5 39.3 1.0 OH L:TYR100 2.7 41.3 1.0 HH L:TYR100 2.8 49.8 1.0 HB3 H:GLU99 3.2 45.0 1.0 CG H:ASP103 3.3 42.4 1.0 HD22 H:ASN33 3.4 49.0 1.0 CD H:GLU99 3.4 39.0 1.0 HD23 A:LEU104 3.5 42.6 1.0 C A:ARG103 3.6 34.7 1.0 OD2 H:ASP103 3.6 41.4 1.0 CZ L:TYR100 3.6 44.9 1.0 HA A:LEU104 3.7 44.9 1.0 HE2 L:TYR100 3.8 54.1 1.0 HB2 H:GLU99 3.8 45.0 1.0 HB3 A:ARG103 3.8 45.7 1.0 CB H:GLU99 3.9 37.3 1.0 CE2 L:TYR100 4.1 44.9 1.0 HA H:ASP103 4.1 42.9 1.0 HB2 H:ASN33 4.2 44.8 1.0 HG2 A:ARG103 4.2 48.6 1.0 ND2 H:ASN33 4.2 40.7 1.0 CG H:GLU99 4.2 38.0 1.0 CD2 A:LEU104 4.4 35.3 1.0 OD2 H:ASP35 4.4 41.2 1.0 OE2 H:GLU99 4.4 37.7 1.0 OD1 H:ASP35 4.4 39.1 1.0 N A:LEU104 4.5 34.7 1.0 CA A:LEU104 4.5 37.3 1.0 O H:HOH435 4.5 47.4 1.0 CB A:ARG103 4.5 38.0 1.0 H A:ARG103 4.5 43.6 1.0 HD3 A:ARG103 4.6 54.2 1.0 CA A:ARG103 4.6 36.4 1.0 CB H:ASP103 4.6 36.9 1.0 HD22 A:LEU104 4.6 42.6 1.0 HD21 H:ASN33 4.6 49.0 1.0 O H:HOH414 4.7 41.2 1.0 CE1 L:TYR100 4.7 46.4 1.0 HG3 H:GLU99 4.8 45.8 1.0 CG A:ARG103 4.8 40.4 1.0 CG H:ASP35 4.8 37.0 1.0 HD21 A:LEU104 4.8 42.6 1.0 CA H:ASP103 4.8 36.4 1.0 HE1 L:TYR100 4.8 55.9 1.0 OD2 H:ASP50 4.9 45.2 1.0 HG2 H:GLU99 4.9 45.8 1.0 N A:ARG103 4.9 36.2 1.0 CB H:ASN33 5.0 37.1 1.0 HB2 H:ASP103 5.0 43.3 1.0

H.G.Olesen, G.R.Andersen. Structure-Function Analysis of Argx-117, A Calcium- and pH-Dependent Clinical Phase Complement C2 Blocking Antibody To Be Published.