Abstract: The invention refers to a replicable genetic package displaying a peptide having at least one intramolecular cyclic bond between two heteroatoms of amino acid side chains, a method of preparing a replicable genetic package, a method of producing a library and a library of replicable genetic package.

Abstract: The invention provides a replicable genetic package displaying a cyclic peptide having at least one intramolecular bond between amino acid side chains. Also provided are a method of preparing such a genetic package displaying cyclic peptides having at least one intramolecular bond. Further provided is a library of replicable genetic packages displaying cyclic peptides each having at least one intramolecular cyclic bond between amino acid side chains; and a method of producing such a library.

Abstract: The invention provides a replicable genetic package displaying a cyclic peptide having at least one intramolecular bond between amino acid side chains. Also provided are a method of preparing such a genetic package displaying cyclic peptides having at least one intramolecular bond. Further provided is a library of replicable genetic packages displaying cyclic peptides each having at least one intramolecular cyclic bond between amino acid side chains; and a method of producing such a library.

Abstract: The invention provides a method of biosynthesis of a cyclic peptide by enzymatically transforming a substrate peptide into the cyclic peptide, wherein the substrate peptide is expressed by a displaying genetic package and comprises at least one Ser or Thr residue and at least one Cys residue, and the enzyme is a post-translationally modifying enzyme (PTME) which is a bifunctional thioether bridge forming dehydratase and cyclase, thereby obtaining the displaying genetic package carrying the cyclic peptide comprising a thioether bridge crosslinking the at least one Ser or Thr to Cys; and further a library of immobilised cyclic peptides, each with a length of at least 10 amino acids, comprising a variety of at least 106 library members, which variety comprises at least one of a) a different position of the thioether bridge forming a loop within the substrate peptide; or b) a different number of loops within the substrate peptide.

Abstract: The invention provides a replicable genetic package displaying a cyclic peptide having at least one intramolecular bond between amino acid side chains. Also provided are a method of preparing such a genetic package displaying cyclic peptides having at least one intramolecular bond. Further provided is a library of replicable genetic packages displaying cyclic peptides each having at least one intramolecular cyclic bond between amino acid side chains; and a method of producing such a library.

Abstract: The invention provides a replicable genetic package displaying a cyclic peptide having at least one intramolecular bond between amino acid side chains. Also provided are a method of preparing such a genetic package displaying cyclic peptides having at least one intramolecular bond. Further provided is a library of replicable genetic packages displaying cyclic peptides each having at least one intramolecular cyclic bond between amino acid side chains; and a method of producing such a library.

Abstract: The invention provides a replicable genetic package displaying a cyclic peptide having at least one intramolecular bond between amino acid side chains. Also provided are a method of preparing such a genetic package displaying cyclic peptides having at least one intramolecular bond. Further provided is a library of replicable genetic packages displaying cyclic peptides each having at least one intramolecular cyclic bond between amino acid side chains; and a method of producing such a library.