Photochemically-enabled, post-translational production of C-terminal amides

David Hymel, Felix Wojcik, Kim S. Halskov, Wouter F. J. Hogendorf, Sydnee C. Wong, Ben M. Williams, Asmus R. Mortensen, Nick Cox, Ayesha Misquith, Nanna B. Holländer, Finn Matthiesen, Suneet Mehrotra and Michael R. Harris ()
Additional contact information
David Hymel: Inc.
Felix Wojcik: Novo Nordisk A/S
Kim S. Halskov: Novo Nordisk A/S
Wouter F. J. Hogendorf: Novo Nordisk A/S
Sydnee C. Wong: Inc.
Ben M. Williams: Novo Nordisk A/S
Asmus R. Mortensen: Novo Nordisk A/S
Nick Cox: Inc.
Ayesha Misquith: Inc.
Nanna B. Holländer: Novo Nordisk A/S
Finn Matthiesen: Novo Nordisk A/S
Suneet Mehrotra: Inc.
Michael R. Harris: Inc.

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract C-terminal α-amidated peptides are attractive therapeutic targets, but preparative methods to access amidated pharmaceuticals are limited both on lab and manufacturing-scale. Here we report a straightforward and scalable approach to the C-terminal α-amidation of peptides and proteins from cysteine-extended polypeptide precursors. This amidation protocol consists of three highly efficient steps: 1) selective cysteine thiol substitution with a photolabel, 2) photoinduced decarboxylative elimination and 3) enamide cleavage by simple acidolysis or inverse electron demand Diels-Alder reaction. We provide a blueprint for applying this protocol to the semi-recombinant production of therapeutically relevant targets where gram scale C-terminal α-amidation is achieved in a photoflow reactor on a recombinantly prepared peptide YY analogue and a GLP-1/amylin co-agonist precursor peptide. Robust performance of this reaction cascade in flow highlights the potential of this chemistry to enable amidated drug leads to enter development that would not be viable on commercial scale using existing technology.

Date: 2024
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DOI: 10.1038/s41467-024-51005-5

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