Figure 4 - full size

Figure 4.
Fig. 4. Two distinct conformations of glyphosate. Displayed are the electron densities, contoured at 3 , derived from 1F[o] – 1F[c] Fourier syntheses to 1.7-Å resolution, omitting the model of glyphosate during the refinement of the ternary complexes of CP4 EPSP synthase (Left) and Ala-100–Gly CP4 EPSP synthase (Right). (Right) The conformation of glyphosate upon interaction with the Ala-100–Gly CP4 EPSP synthase is identical to the one observed in the E. coli or Str. pneumoniae enzymes. (Left) With an Ala residue in position 100, the glyphosate molecule is 0.6 Å shorter, mainly because of a rotation around the C 4 N bond next to the carboxyl group.