Magnesium in PDB 9fsq: Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc)

All present enzymatic activity of Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc):
2.7.7.6;

The structure of Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc) also contains other interesting chemical elements:

Iron	(Fe)	4 atoms
Zinc	(Zn)	9 atoms

The binding sites of Magnesium atom in the Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc) (pdb code 9fsq). 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 Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc), PDB code: 9fsq:

Magnesium binding site 1 out of 1 in the Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc)


Mono view


Stereo pair view

A full contact list of Magnesium with other atoms in the Mg binding site number 1 of Rna Polymerase III Class III Melting Pre-Initiation Complex (Mc) within 5.0Å range: probe atom residue distance (Å) B Occ A:Mg1403 b:67.6 occ:1.00 OD1 A:ASP503 1.9 37.3 1.0 OD2 A:ASP499 1.9 46.4 1.0 OD1 A:ASP499 2.0 46.4 1.0 CG A:ASP499 2.2 46.4 1.0 OD1 A:ASP501 2.3 45.4 1.0 CG A:ASP503 2.5 37.3 1.0 OD2 A:ASP503 2.7 37.3 1.0 CG A:ASP501 3.2 45.4 1.0 OD2 A:ASP501 3.4 45.4 1.0 CB A:ASP499 3.7 46.4 1.0 CB A:ASP503 3.9 37.3 1.0 N A:ASP503 4.4 37.3 1.0 CA A:ASP503 4.5 37.3 1.0 N A:ASP501 4.5 45.4 1.0 CB A:ASP501 4.5 45.4 1.0 CA A:ASP499 4.5 46.4 1.0 N A:ASP499 4.6 46.4 1.0 O A:ASP501 4.6 45.4 1.0 C A:ASP501 4.6 45.4 1.0 C A:ASP499 4.7 46.4 1.0 CA A:ASP501 4.8 45.4 1.0 NH2 A:ARG464 4.8 39.2 1.0 N A:PHE500 5.0 34.2 1.0

S.Z.Shah, T.N.Perry, A.Graziadei, V.Cecatiello, T.Kaliyappan, A.D.Misiaszek, C.W.Muller, E.P.Ramsay, A.Vannini. Structural Insights Into Distinct Mechanisms of Rna Polymerase II and III Recruitment to Snrna Promoters. Nat Commun V. 16 141 2025.
ISSN: ESSN 2041-1723
PubMed: 39747245
DOI: 10.1038/S41467-024-55553-8