Calcium in PDB 5xiw: Crystal Structure of T2R-Ttl-Colchicine Complex

The structure of Crystal Structure of T2R-Ttl-Colchicine Complex, PDB code: 5xiw was solved by Y.Wang, J.Yang, T.Wang, L.Chen, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	119.72 / 2.90
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	105.491, 159.148, 181.702, 90.00, 90.00, 90.00
R / Rfree (%)	20.4 / 25.3

The structure of Crystal Structure of T2R-Ttl-Colchicine Complex also contains other interesting chemical elements:

Magnesium

(Mg)

4 atoms

The binding sites of Calcium atom in the Crystal Structure of T2R-Ttl-Colchicine Complex (pdb code 5xiw). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 2 binding sites of Calcium where determined in the Crystal Structure of T2R-Ttl-Colchicine Complex, PDB code: 5xiw:
Jump to Calcium binding site number: 1; 2;

Calcium binding site 1 out of 2 in the Crystal Structure of T2R-Ttl-Colchicine Complex


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 T2R-Ttl-Colchicine Complex within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca503 b:0.7 occ:1.00 O A:GLY44 2.4 93.8 1.0 OE2 A:GLU55 2.7 91.6 1.0 OG1 A:THR41 2.7 0.2 1.0 OD1 A:ASP39 2.8 88.2 1.0 OD2 A:ASP39 2.9 83.3 1.0 O A:THR41 2.9 0.0 1.0 OE1 A:GLU55 3.1 97.0 1.0 CG A:ASP39 3.2 88.5 1.0 CD A:GLU55 3.3 95.0 1.0 C A:GLY44 3.5 94.7 1.0 OD2 A:ASP47 3.6 91.7 1.0 CB A:THR41 3.8 0.3 1.0 OD1 A:ASN50 3.8 91.1 1.0 CA A:GLY45 3.9 97.0 1.0 C A:THR41 3.9 0.4 1.0 CZ A:PHE49 4.1 87.8 1.0 N A:GLY45 4.1 93.8 1.0 CA A:THR41 4.3 0.3 1.0 CE1 A:PHE49 4.6 87.9 1.0 N A:THR41 4.6 0.9 1.0 C A:GLY45 4.6 99.0 1.0 CG A:ASN50 4.7 85.8 1.0 CA A:GLY44 4.7 95.6 1.0 CB A:ASP39 4.7 93.1 1.0 CG A:ASP47 4.7 90.0 1.0 ND2 A:ASN50 4.7 85.0 1.0 CG A:GLU55 4.8 94.2 1.0 N A:GLY44 4.8 94.6 1.0 NE2 A:HIS61 4.9 0.0 1.0 O A:GLY45 4.9 0.5 1.0

Calcium binding site 2 out of 2 in the Crystal Structure of T2R-Ttl-Colchicine Complex


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Crystal Structure of T2R-Ttl-Colchicine Complex within 5.0Å range: probe atom residue distance (Å) B Occ C:Ca503 b:84.3 occ:1.00 OE2 C:GLU55 2.5 73.0 1.0 O C:GLY44 2.7 84.1 1.0 OD1 C:ASP39 2.7 81.4 1.0 O C:THR41 2.7 85.8 1.0 OG1 C:THR41 2.8 89.0 1.0 OD2 C:ASP39 2.8 75.8 1.0 OE1 C:GLU55 3.2 77.3 1.0 CG C:ASP39 3.2 79.3 1.0 CD C:GLU55 3.2 73.8 1.0 OD2 C:ASP47 3.3 84.6 1.0 C C:GLY44 3.5 83.5 1.0 C C:THR41 3.8 84.1 1.0 CB C:THR41 3.8 88.0 1.0 CA C:GLY45 3.8 86.3 1.0 OD1 C:ASN50 3.9 82.1 1.0 N C:GLY45 4.0 84.8 1.0 CA C:THR41 4.2 85.5 1.0 N C:THR41 4.5 85.4 1.0 CG C:ASP47 4.5 83.5 1.0 CZ C:PHE49 4.5 77.6 1.0 CA C:GLY44 4.6 82.5 1.0 CE1 C:PHE49 4.7 77.6 1.0 CB C:ASP39 4.7 82.8 1.0 CG C:GLU55 4.7 69.0 1.0 N C:GLY44 4.8 82.2 1.0 CG C:ASN50 4.8 77.0 1.0 C C:GLY45 4.9 90.2 1.0 ND2 C:ASN50 4.9 79.1 1.0 N C:ILE42 5.0 83.0 1.0

Y.Jianhong, Y.Wei, Y.Yamei, W.Yuxi, Y.Tao, X.Linlin, Y.Xue, L.Caofeng, L.Zuowei, C.Xiaoxin, H.Mengshi, Z.Li, Q.Qiang, P.Heying, L.Dan, W.Fang, B.Peng, W.Jiaolin, Y.Haoyu, C.Lijuan. The Compound Millepachine and Its Derivatives Inhibit Tubulin Polymerization By Irreversibly Binding to the Colchicine-Binding Site in Beta-Tubulin. J. Biol. Chem. 2018.
ISSN: ESSN 1083-351X
PubMed: 29691282
DOI: 10.1074/JBC.RA117.001658