Late-stage modification of peptides and proteins at cysteine with diaryliodonium salts.

ABSTRACT: The modification of peptides and proteins has emerged as a powerful means to efficiently prepare high value bioconjugates for a range of applications in chemical biology and for the development of next-generation therapeutics. Herein, we report a novel method for the chemoselective late-stage modification of peptides and proteins at cysteine in aqueous buffer with suitably functionalised diaryliodonium salts, furnishing stable thioether-linked synthetic conjugates. The power of this new platform is showcased through the late-stage modification of the affibody zEGFR and the histone protein H2A.

SUBMITTER: Byrne SA 

PROVIDER: S-EPMC8565360 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature