Figure 4From: Molecular basis for the distinct divalent cation requirement in the uridylylation of the signal transduction proteins GlnJ and GlnB from Rhodospirillum rubrumCartoon representation of the structural model for GlnJ, constructed based on the determined structure of A. brasilense GlnZ, with ligands (PDB 3MHY). ATP is shown in gray, Magnesium ion in yellow, 2-OG in red and the residues K85 and Q42 are highlighted in blue and green respectively.Back to article page