Calcium in PDB 1aks: Crystal Structure of the First Active Autolysate Form of the Porcine Alpha Trypsin

All present enzymatic activity of Crystal Structure of the First Active Autolysate Form of the Porcine Alpha Trypsin:
3.4.21.4;

The structure of Crystal Structure of the First Active Autolysate Form of the Porcine Alpha Trypsin, PDB code: 1aks was solved by A.Johnson, S.Krishnaswamy, P.V.Sundaram, V.Pattabhi, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	8.00 / 1.80
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	77.700, 53.820, 47.080, 90.00, 90.00, 90.00
R / Rfree (%)	20 / n/a

The binding sites of Calcium atom in the Crystal Structure of the First Active Autolysate Form of the Porcine Alpha Trypsin (pdb code 1aks). 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 the First Active Autolysate Form of the Porcine Alpha Trypsin, PDB code: 1aks:

Calcium binding site 1 out of 1 in the Crystal Structure of the First Active Autolysate Form of the Porcine Alpha Trypsin


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 the First Active Autolysate Form of the Porcine Alpha Trypsin within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca146 b:2.0 occ:1.00 O A:HOH197 1.6 14.4 1.0 OE2 A:GLU77 1.9 24.1 1.0 O A:ASN72 2.1 24.7 1.0 O A:VAL75 2.3 27.7 1.0 H1 A:HOH197 2.3 0.0 1.0 OE1 A:GLU70 2.3 19.2 1.0 OE2 A:GLU80 2.5 19.5 1.0 H2 A:HOH197 2.5 0.0 1.0 CD A:GLU77 2.8 27.8 1.0 H A:GLU77 3.2 0.0 1.0 C A:ASN72 3.3 20.1 1.0 CG A:GLU77 3.3 30.9 1.0 H A:HIS71 3.4 0.0 1.0 C A:VAL75 3.5 26.5 1.0 CD A:GLU70 3.5 19.4 1.0 H A:ASN72 3.6 0.0 1.0 CD A:GLU80 3.6 20.8 1.0 H A:VAL75 3.6 0.0 1.0 OE1 A:GLU77 3.8 32.4 1.0 N A:ASN72 3.9 17.2 1.0 N A:GLU77 4.0 35.4 1.0 CG A:GLU80 4.0 21.3 1.0 OE2 A:GLU70 4.0 16.0 1.0 CA A:ASN72 4.1 19.5 1.0 N A:ILE73 4.2 21.4 1.0 N A:VAL75 4.3 21.9 1.0 CB A:ASN72 4.3 19.1 1.0 CB A:GLU77 4.3 34.8 1.0 N A:HIS71 4.3 14.9 1.0 CA A:LEU76 4.3 34.5 1.0 N A:LEU76 4.3 29.8 1.0 CA A:ILE73 4.4 21.6 1.0 H1 A:HOH205 4.4 0.0 1.0 CA A:VAL75 4.5 21.9 1.0 OE1 A:GLU80 4.6 19.4 1.0 C A:ILE73 4.7 22.7 1.0 C A:LEU76 4.7 34.4 1.0 CA A:GLU70 4.7 17.3 1.0 CG A:GLU70 4.8 17.9 1.0 CA A:GLU77 4.8 32.5 1.0 C A:HIS71 4.8 16.7 1.0 CB A:GLU70 4.9 12.6 1.0 CB A:VAL75 5.0 23.9 1.0 N A:ASP74 5.0 25.3 1.0

A.Johnson, S.Krishnaswamy, P.V.Sundaram, V.Pattabhi. The First Structure at 1.8 A Resolution of An Active Autolysate Form of Porcine Alpha-Trysoin. Acta Crystallogr.,Sect.D V. 53 311 1997.
ISSN: ISSN 0907-4449
PubMed: 15299934
DOI: 10.1107/S0907444997000358