ABSTRACT
Synthetic genes for avian pancreatic polypeptide (aPP) and for the miniature DNA binding protein PPBR4 were cloned and expressed on the surface of M13 bacteriophage. We anticipate that these constructs will have utility optimizing the properties of miniature proteins based on aPP that result from our previously described protein grafting procedure.
Subject(s)
Pancreatic Polypeptide/chemistry , Peptide Fragments/chemistry , Peptide Library , Animals , Bacteriophage M13/metabolism , Cloning, Molecular , DNA-Binding Proteins/chemical synthesis , Drug Design , Methods , Protein Structure, Secondary , Structure-Activity RelationshipABSTRACT
Here, the synthesis of a bowl-shaped molecule is described and evidence of its reversible dimerization by means of hydrogen bonds is presented. The dimer features a flattened spherical cavity of peculiar symmetry and acts as a host for the encapsulation of guest molecules of complementary shape. Encapsulation of aromatic guests in chloroform solution and of cyclohexane in p-xylene solution was demonstrated by nuclear magnetic resonance experiments. The passage of guests into and out of the cavity is slow and occurs on a time scale of hours. The system was used to explore the effects of size, shape, and solvation on molecular recognition coupled with assembly.