Figure 3
Detailed view of the adenylylated T-loop region (residues 43–55) in (a) chain A (with C atoms colored gray), (b) chain B (colored green) and (c) chain E (colored orange) of the adGlnK hexamer (chains A–F). The 2mFo − DFc electron-density map is shown in blue within a radius of 1.5 Å of any displayed atoms and is contoured at 1σ. (d) Stereo representation of the immediate surroundings of the adenylylated Tyr51 in chain E. Residues from chains B, E and F are colored green, blue and orange, respectively. Potential hydrogen bonds are shown as dotted black lines. The π–π-stacking interaction between the tyrosyl moiety of adTyr51 and Phe11′′ is shown as a dotted red line. |