Polar surface area (PSA) calculated for the erythronolides
and
HCV NS3/4A protease inhibitors. For each compound, PSA has been calculated
for the conformation(s) adopted in the crystal structures and for
the conformational ensembles generated by MC (green), MOE (pink),
and OMEGA (yellow) in apolar and polar environments. PSA was calculated
on the basis of the surface area of the molecule that arises from
oxygen and nitrogen atoms, plus their attached hydrogen atoms, using
the Schrödinger software.37,38 Box plots
show minimum and maximum values as whiskers; the boxes span the 25th–75th
percentile range, and the MECs are indicated as black circles. Figure S3 shows these data plotted with a fixed
scale for PSA for all 10 compounds.