Calcium in PDB 1aqh: Alpha-Amylase From Alteromonas Haloplanctis

All present enzymatic activity of Alpha-Amylase From Alteromonas Haloplanctis:
3.2.1.1;

The structure of Alpha-Amylase From Alteromonas Haloplanctis, PDB code: 1aqh was solved by N.Aghajari, R.Haser, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	43.00 / 2.00
Space group	C 2 2 21
Cell size a, b, c (Å), α, β, γ (°)	71.400, 138.700, 115.700, 90.00, 90.00, 90.00
R / Rfree (%)	15.7 / 20.4

The structure of Alpha-Amylase From Alteromonas Haloplanctis also contains other interesting chemical elements:

Chlorine

(Cl)

1 atom

The binding sites of Calcium atom in the Alpha-Amylase From Alteromonas Haloplanctis (pdb code 1aqh). 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 Alpha-Amylase From Alteromonas Haloplanctis, PDB code: 1aqh:

Calcium binding site 1 out of 1 in the Alpha-Amylase From Alteromonas Haloplanctis


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Alpha-Amylase From Alteromonas Haloplanctis within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca800 b:17.6 occ:1.00 H2 A:HOH1107 1.8 15.0 1.0 H2 A:HOH1108 2.2 15.0 1.0 H2 A:HOH1091 2.4 15.0 1.0 O A:HIS178 2.4 13.9 1.0 O A:HOH1091 2.4 11.1 1.0 OD1 A:ASN88 2.5 14.1 1.0 O A:HOH1108 2.5 10.7 1.0 OD2 A:ASP144 2.6 12.8 1.0 OD1 A:ASP144 2.6 19.0 1.0 O A:HOH1107 2.7 11.9 1.0 O A:GLN135 2.7 18.0 1.0 CG A:ASP144 2.9 14.2 1.0 H1 A:HOH1107 3.1 15.0 1.0 H1 A:HOH1108 3.3 15.0 1.0 H1 A:HOH1091 3.3 15.0 1.0 C A:HIS178 3.6 11.5 1.0 C A:GLN135 3.6 16.3 1.0 CG A:ASN88 3.6 14.5 1.0 HD21 A:ASN88 3.8 0.0 1.0 HD1 A:HIS117 3.9 15.0 1.0 ND2 A:ASN88 4.2 12.2 1.0 CA A:GLN135 4.2 14.3 1.0 CB A:HIS178 4.2 10.4 1.0 CB A:ASP144 4.4 14.1 1.0 CA A:HIS178 4.4 12.8 1.0 O A:ASN88 4.4 15.8 1.0 CE1 A:HIS117 4.4 18.1 1.0 CG2 A:VAL179 4.5 8.5 1.0 N A:ASN136 4.5 12.2 1.0 ND1 A:HIS117 4.5 14.6 1.0 N A:VAL179 4.5 13.5 1.0 O A:LEU145 4.6 15.9 1.0 CA A:VAL179 4.6 12.4 1.0 O A:CYS137 4.7 11.5 1.0 CA A:ASN136 4.7 14.2 1.0 CB A:ASN88 4.8 12.6 1.0 HG1 A:THR147 4.8 15.0 1.0 O A:VAL134 4.8 13.3 1.0 H1 A:HOH1017 4.9 15.0 1.0 O A:HOH1144 4.9 13.5 1.0 CB A:GLN135 5.0 11.5 1.0

N.Aghajari, G.Feller, C.Gerday, R.Haser. Crystal Structures of the Psychrophilic Alpha-Amylase From Alteromonas Haloplanctis in Its Native Form and Complexed with An Inhibitor. Protein Sci. V. 7 564 1998.
ISSN: ISSN 0961-8368
PubMed: 9541387