title: Controlled coupling of peptides at their C-termini.
abstract: Fusion of two proteins has become an important tool in biotechnology. Whereas biotechnological methods easily can produce C-terminal to N-terminal fused compounds, methods to couple two proteins to each of their C-termini are not easily accessible. Herein, peptides are used as models for larger proteins. A method is described exploiting the possibility to attach different reactive handles to their C-termini using a reaction catalyzed by the enzyme carboxypeptidase Y (CPY). It is possible to attach pairs of reaction handles which can react with each other to each of the peptides to be coupled. In a second step, the two modified peptides can be linked together by a chemical reaction, such as an oxime-forming reaction or a copper(I) catalyzed [2+3]-cycloaddition reaction of an azide with an alkyne.
authors.affiliation: Biopharm Chemistry, Maaloev, Denmark. bpes@novonordisk.com
authors.forename: Bernd
authors.initials: B
authors.lastname: Peschke
authors.forename: Sonja
authors.initials: S
authors.lastname: Bak
mesh_terms: D043402:Cathepsin A / Q000737:chemistry / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D010455:Peptides / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010455:Peptides; D043402:Cathepsin A