Volume 134, Issue 5 e202111388
Forschungsartikel

Site-Selective Itaconation of Complex Peptides by Photoredox Catalysis

Dr. Siyao Wang

Dr. Siyao Wang

Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai, 200240 China

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Dr. QingQing Zhou

Dr. QingQing Zhou

Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai, 200240 China

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Dr. Xiaheng Zhang

Dr. Xiaheng Zhang

School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024 China

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Prof. Ping Wang

Corresponding Author

Prof. Ping Wang

Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, No. 800, Dongchuan Rd, Shanghai, 200240 China

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First published: 29 November 2021

Abstract

Site-selective peptide functionalization provides a straightforward and cost-effective access to diversify peptides for biological studies. Among many existing non-invasive peptide conjugations methodologies, photoredox catalysis has emerged as one of the powerful approaches for site-specific manipulation on native peptides. Herein, we report a highly N-termini-specific method to rapidly access itaconated peptides and their derivatives through a combination of transamination and photoredox conditions. This strategy exploits the facile reactivity of peptidyl-dihydropyridine in the complex peptide settings, complementing existing approaches for bioconjugations with excellent selectivity under mild conditions. Distinct from conventional methods, this method utilizes the highly reactive carbamoyl radical derived from a peptidyl-dihydropyridine. In addition, this itaconated peptide can be further functionalized as a Michael acceptor to access the corresponding peptide-protein conjugate.

Conflict of interest

The authors declare no conflict of interest.

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