Structure models of wild type and mutant (I148M) PNPLA3. The
domain structure of PNPLA3, showing the patatin-like domain (black) and
locations of the catalytic dyad (Ser47 and Asp166) and the I148M substitution
associated with increased hepatic triglyceride content, is shown. Structure
models of normal (Ile148) and mutant (Met148) PNPLA3 are shown in the
left and right panels, respectively. Protein traces are rainbow-colored from N to
C terminus (blue to red) with side chains of catalytic dyad residues (positions
47 and 166) shown. The dots indicate a space-filling model corresponding to
van der Waals atomic radii. Oxygen and sulfur atoms are colored red and
yellow, respectively.