Figure 3.

Comparison of the Known Structures of PMEs.

(A) Overlay of the Cα trace of PME from tomato (green) and PME from carrot (orange). Structures are almost completely superimposable, with a RMSD value of 0.7 Å, calculated on all Cα.

(B) Superimposition of PME from tomato (green) and PME from E. chrysanthemi (violet). The RMSD value, calculated on 284 out of 317 Cα, is 1.8 Å. Although the β-helices are completely superimposable, main differences are located in the length of the turns protruding out from the β-helix in proximity of the putative active site cleft.