Magnesium in PDB 2a5g: Cholera Toxin A1 Subunit Bound to ARF6(Q67L)

All present enzymatic activity of Cholera Toxin A1 Subunit Bound to ARF6(Q67L):
2.4.2.36;

The structure of Cholera Toxin A1 Subunit Bound to ARF6(Q67L), PDB code: 2a5g was solved by C.J.O'neal, M.G.Jobling, R.K.Holmes, W.G.J.Hol, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	18.52 / 2.66
Space group	P 1
Cell size a, b, c (Å), α, β, γ (°)	38.067, 44.484, 56.045, 107.38, 101.72, 102.94
R / Rfree (%)	19.9 / 26.5

The structure of Cholera Toxin A1 Subunit Bound to ARF6(Q67L) also contains other interesting chemical elements:

Sodium

(Na)

1 atom

The binding sites of Magnesium atom in the Cholera Toxin A1 Subunit Bound to ARF6(Q67L) (pdb code 2a5g). This binding sites where shown within 5.0 Angstroms radius around Magnesium atom.
In total only one binding site of Magnesium was determined in the Cholera Toxin A1 Subunit Bound to ARF6(Q67L), PDB code: 2a5g:

Magnesium binding site 1 out of 1 in the Cholera Toxin A1 Subunit Bound to ARF6(Q67L)


Mono view


Stereo pair view

A full contact list of Magnesium with other atoms in the Mg binding site number 1 of Cholera Toxin A1 Subunit Bound to ARF6(Q67L) within 5.0Å range: probe atom residue distance (Å) B Occ A:Mg231 b:21.4 occ:1.00 O2B A:GTP230 2.0 26.8 1.0 OG1 A:THR44 2.1 2.0 1.0 O A:HOH235 2.1 15.3 1.0 O2G A:GTP230 2.1 27.4 1.0 OG1 A:THR27 2.2 2.0 1.0 PB A:GTP230 3.2 26.8 1.0 CB A:THR27 3.2 2.0 1.0 CB A:THR44 3.3 2.0 1.0 PG A:GTP230 3.3 27.3 1.0 O3B A:GTP230 3.4 27.0 1.0 N A:THR44 3.6 2.0 1.0 O2A A:GTP230 3.6 26.8 1.0 O A:ILE42 3.8 2.0 1.0 O A:HOH264 3.9 14.2 1.0 OD2 A:ASP63 4.0 3.1 1.0 O3G A:GTP230 4.0 27.4 1.0 CA A:THR44 4.0 2.0 1.0 N A:THR27 4.1 2.0 1.0 O3A A:GTP230 4.2 26.8 1.0 PA A:GTP230 4.2 26.7 1.0 CG2 A:THR27 4.2 2.0 1.0 CA A:THR27 4.3 2.0 1.0 O1A A:GTP230 4.3 26.8 1.0 O1B A:GTP230 4.3 26.9 1.0 CG2 A:THR44 4.4 2.0 1.0 O1G A:GTP230 4.4 27.3 1.0 OD1 A:ASP63 4.4 3.2 1.0 C A:PRO43 4.6 2.0 1.0 CG A:ASP63 4.7 3.0 1.0 CA A:PRO43 4.8 2.0 1.0 OD1 A:ASN48 4.8 2.4 1.0 C A:ILE42 4.9 2.0 1.0

C.J.O'neal, M.G.Jobling, R.K.Holmes, W.G.Hol. Structural Basis For the Activation of Cholera Toxin By Human ARF6-Gtp. Science V. 309 1093 2005.
ISSN: ISSN 0036-8075
PubMed: 16099990
DOI: 10.1126/SCIENCE.1113398