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Figure 1.
Overall structure of the PII·NAGK complex.A and B, top
and bottom views, respectively, along the molecular 3-fold
rotational axis; C, side view along the 2-fold axis bisecting
interface A; D, side view along the 2-fold axis bisecting
interface B. In A and B, the views taken in C and D are marked
with gray letters beside the respective 2-fold rotational axes.
In C and D, the views taken in A and B are marked with gray
letters beside the 3-fold rotational axis. PII is colored dark
gray; ATP bound to PII and ADP bound to NAGK are colored
magenta. NAGK protomers are colored yellow and green;
N-acetylglutamate (NAG) is colored red, and arginine is colored
blue. Figs. 1, 2, 3, 4 were prepared using PyMOL (38).
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