Calcium in PDB 7dad: Epd in Complex with Tubulin

The structure of Epd in Complex with Tubulin, PDB code: 7dad was solved by Y.Wang, C.Wu, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	49.91 / 2.85
Space group	P 21 21 21
Cell size a, b, c (Å), α, β, γ (°)	105.163, 158.506, 181.605, 90, 90, 90
R / Rfree (%)	17.9 / 22.6

The structure of Epd in Complex with Tubulin also contains other interesting chemical elements:

Chlorine	(Cl)	1 atom
Magnesium	(Mg)	5 atoms

The binding sites of Calcium atom in the Epd in Complex with Tubulin (pdb code 7dad). This binding sites where shown within 5.0 Angstroms radius around Calcium atom.
In total 4 binding sites of Calcium where determined in the Epd in Complex with Tubulin, PDB code: 7dad:
Jump to Calcium binding site number: 1; 2; 3; 4;

Calcium binding site 1 out of 4 in the Epd in Complex with Tubulin


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 1 of Epd in Complex with Tubulin within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca503 b:71.5 occ:1.00 OD2 A:ASP39 2.2 59.6 1.0 OE2 A:GLU55 2.3 60.5 1.0 OG1 A:THR41 2.4 84.6 1.0 O A:THR41 2.4 72.0 1.0 O A:GLY44 2.4 51.8 1.0 OE1 A:GLU55 2.5 65.3 1.0 OD1 A:ASP39 2.6 61.8 1.0 CG A:ASP39 2.7 56.7 1.0 CD A:GLU55 2.7 63.0 1.0 C A:THR41 3.5 70.4 1.0 C A:GLY44 3.5 54.2 1.0 CB A:THR41 3.6 69.3 1.0 CA A:THR41 4.0 75.3 1.0 CB A:ASP39 4.2 52.5 1.0 CG A:GLU55 4.2 48.1 1.0 OD2 A:ASP47 4.3 65.1 1.0 N A:GLY44 4.3 57.8 1.0 N A:GLY45 4.3 46.7 1.0 CA A:GLY44 4.4 67.6 1.0 N A:THR41 4.4 65.4 1.0 CA A:GLY45 4.5 67.4 1.0 CZ A:PHE49 4.5 62.5 1.0 OD1 A:ASN50 4.6 58.3 1.0 N A:ILE42 4.6 50.5 1.0 NE2 A:HIS61 4.6 64.7 1.0 ND2 A:ASN50 4.7 53.2 1.0 CG2 A:THR41 4.7 64.4 1.0 CA A:ILE42 4.9 57.6 1.0

Calcium binding site 2 out of 4 in the Epd in Complex with Tubulin


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 2 of Epd in Complex with Tubulin within 5.0Å range: probe atom residue distance (Å) B Occ A:Ca505 b:88.9 occ:1.00 OD2 E:ASP44 4.0 105.4 1.0 O A:GLU196 4.1 52.2 1.0 OD1 E:ASP44 4.2 60.4 1.0 NZ A:LYS166 4.4 65.1 1.0 OG A:SER158 4.4 46.5 1.0 CG E:ASP44 4.5 82.3 1.0 OD1 A:ASP199 4.6 30.8 1.0 CB A:SER158 4.8 38.8 1.0 O A:GLY162 4.8 56.8 1.0 O A:HIS197 4.8 41.8 1.0 CA A:HIS197 4.9 36.0 1.0 C A:HIS197 5.0 38.3 1.0

Calcium binding site 3 out of 4 in the Epd in Complex with Tubulin


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 3 of Epd in Complex with Tubulin within 5.0Å range: probe atom residue distance (Å) B Occ B:Ca503 b:82.5 occ:1.00 OE2 B:GLU111 2.6 84.8 1.0 OE1 B:GLU111 3.1 72.5 1.0 CD B:GLU111 3.2 77.3 1.0 OE1 B:GLU108 4.4 36.1 1.0 CG B:GLU111 4.7 38.4 1.0

Calcium binding site 4 out of 4 in the Epd in Complex with Tubulin


Mono view


Stereo pair view

A full contact list of Calcium with other atoms in the Ca binding site number 4 of Epd in Complex with Tubulin within 5.0Å range: probe atom residue distance (Å) B Occ C:Ca503 b:47.9 occ:1.00 OG1 C:THR41 2.1 69.7 1.0 OD1 C:ASP39 2.4 38.7 1.0 OE2 C:GLU55 2.4 49.3 1.0 OD2 C:ASP39 2.4 44.1 1.0 O C:THR41 2.4 53.0 1.0 O C:GLY44 2.5 60.4 1.0 OE1 C:GLU55 2.6 40.6 1.0 CG C:ASP39 2.7 33.9 1.0 CD C:GLU55 2.8 49.2 1.0 CB C:THR41 3.3 59.0 1.0 C C:THR41 3.4 46.4 1.0 C C:GLY44 3.7 51.2 1.0 CA C:THR41 3.8 46.9 1.0 OD2 C:ASP47 4.1 66.9 1.0 N C:THR41 4.1 45.0 1.0 CB C:ASP39 4.2 43.4 1.0 OD1 C:ASN50 4.3 55.4 1.0 CG C:GLU55 4.3 28.6 1.0 CZ C:PHE49 4.4 35.9 1.0 CA C:GLY45 4.4 47.1 1.0 N C:GLY45 4.5 55.6 1.0 CG2 C:THR41 4.5 29.5 1.0 N C:GLY44 4.6 51.3 1.0 CA C:GLY44 4.6 48.6 1.0 NE2 C:HIS61 4.6 30.6 1.0 N C:ILE42 4.7 39.2 1.0 CE1 C:PHE49 4.8 23.9 1.0 CA C:ASP39 5.0 46.1 1.0

Q.Xiao, T.Xue, W.Shuai, C.Wu, Z.Zhang, T.Zhang, S.Zeng, B.Sun, Y.Wang. High-Resolution X-Ray Structure of Three Microtubule-Stabilizing Agents in Complex with Tubulin Provide A Rationale For Drug Design. Biochem.Biophys.Res.Commun. V. 534 330 2021.
ISSN: ESSN 1090-2104
PubMed: 33272565
DOI: 10.1016/J.BBRC.2020.11.082