The crystal structure of an aminimide analog of a dipeptide inhibitor
of porcine pancreatic elastase bound to its target serine protease has
been solved. The peptidomimetic molecule binds in the same fashion as
the class of dipeptides from which it was derived, making similar int
eractions with the subsites on the elastase surface. Because aminimide
s are readily synthesized from a wide variety of starting materials, t
hey form the basis for a combinatorial chemistry approach to rational
drug design.