Amylin Pharmaceuticals, Inc.

Sonia Manganiello

Paolo Botti

Hubert Gaertner

Matteo Villain

The invention provides a method of assembling oligopeptide intermediates in a native chemical ligation reaction that eliminates self-ligation of bi-functional intermediates. An important aspect of the invention is a bi-functional intermediate with an N-terminal heterocyclic protecting group which effectively prevents self-ligation in the chemical assembly process. The present invention is useful in methods for convergent synthesis of polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where three or more peptide fragments are used to assemble a polypeptide or protein product.

Chemical peptide ligation with three or more components

The present invention provides a method and compositions for synthesizing an oligopeptide or polypeptide by convergent assembly of a plurality of pairs of oligopeptides in chemical ligation reactions. An important aspect of the present invention is an oligopeptide having a C-terminal disulfide-protected carboxythioester group that can be deprotected to spontaneously generate a free C-terminal thioester moiety. This allows a single precursor to participate in a succession of chemical ligation reactions, thereby making the convergent synthesis approach possible. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins, and improves the efficiency of native chemical ligation reactions, particularly where four or more peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.

Post-cleavage sulfur deprotection for convergent protein synthesis by chemical ligation

The present invention provides methods of assembling oligopeptides or polypeptides in a native chemical ligation reaction that eliminates the formation of unwanted side products resulting from the presence of an unprotected acidic C-terminal oligopeptide thioester. An important aspect of the present invention is providing side chain protected acidic C-terminal oligopeptide thioesters. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where aspartyl or glutamyl peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.

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Geneva, Switzerland

Sonia Manganiello