Calcium in PDB 1viw: Tenebrio Molitor Alpha-Amylase-Inhibitor Complex

All present enzymatic activity of Tenebrio Molitor Alpha-Amylase-Inhibitor Complex:
3.2.1.1;

The structure of Tenebrio Molitor Alpha-Amylase-Inhibitor Complex, PDB code: 1viw was solved by V.Nahoum, M.P.Egloff, F.Payan, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	10.00 / 3.00
Space group	C 1 2 1
Cell size a, b, c (Å), α, β, γ (°)	168.475, 75.911, 61.989, 90.00, 101.29, 90.00
R / Rfree (%)	23 / 29.1

The structure of Tenebrio Molitor Alpha-Amylase-Inhibitor Complex also contains other interesting chemical elements:

Chlorine

(Cl)

1 atom

The binding sites of Calcium atom in the Tenebrio Molitor Alpha-Amylase-Inhibitor Complex (pdb code 1viw). 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 Tenebrio Molitor Alpha-Amylase-Inhibitor Complex, PDB code: 1viw:

Calcium binding site 1 out of 1 in the Tenebrio Molitor Alpha-Amylase-Inhibitor Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Tenebrio Molitor Alpha-Amylase-Inhibitor Complex within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca500 b:33.4 occ:1.00 O A:ARG146 2.2 52.4 1.0 OD1 A:ASN98 2.3 54.7 1.0 OD2 A:ASP155 2.5 86.3 1.0 O A:HIS189 2.7 43.0 1.0 OD1 A:ASP155 2.7 87.0 1.0 CG A:ASP155 2.9 90.6 1.0 CG A:ASN98 3.4 57.9 1.0 C A:ARG146 3.4 28.8 1.0 ND2 A:ASN98 3.8 55.7 1.0 C A:HIS189 3.9 19.9 1.0 O A:LEU156 3.9 35.8 1.0 CE1 A:HIS131 4.0 49.8 1.0 ND1 A:HIS131 4.0 49.8 1.0 O A:ASN98 4.2 55.1 1.0 CB A:ASP155 4.3 88.1 1.0 CA A:ARG146 4.4 28.2 1.0 N A:ASN147 4.4 19.8 1.0 CA A:ASN147 4.5 19.8 1.0 CG A:MET190 4.5 32.0 1.0 CA A:MET190 4.5 64.4 1.0 O A:CYS148 4.7 43.9 1.0 N A:MET190 4.7 63.6 1.0 CB A:ASN98 4.7 53.5 1.0 CB A:HIS189 4.8 45.2 1.0 C A:ASN147 4.9 19.8 1.0 CA A:HIS189 4.9 19.9 1.0 CA A:ASP155 4.9 59.7 1.0

V.Nahoum, F.Farisei, V.Le-Berre-Anton, M.P.Egloff, P.Rouge, E.Poerio, F.Payan. A Plant-Seed Inhibitor of Two Classes of Alpha-Amylases: X-Ray Analysis of Tenebrio Molitor Larvae Alpha-Amylase in Complex with the Bean Phaseolus Vulgaris Inhibitor. Acta Crystallogr.,Sect.D V. 55 360 1999.
ISSN: ISSN 0907-4449
PubMed: 10089450
DOI: 10.1107/S0907444998010701