Figure 2 - full size

 

Figure 2.
Fig. 2. Detailed view of the ester bond and the oxy-anion hole. A, stereo representation illustrating the degree of pyramidal distortion of the ester bond. The transparent plane passes through the carbonyl oxygen of the ester bond, the C[ ]of Ile-7, and O[ ]of Ser-195. The displacement of the carbonyl carbon of the ester bond from this plane is 0.05 Å. B, ball-and-stick representation of the enzymatic ester bond within the oxy-anion hole. The naming convention in Table III is used to identify atoms. C, ball-and-stick representation of the ethyl-acetate structure, providing an example of a small molecular ester.

The above figure is reprinted by permission from the ASBMB: J Biol Chem (2002, 277, 21962-21970) copyright 2002.