期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 30, 页码 8665-8668出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201502607
关键词
bioconjugation; macrocyclization; oxime ligation; peptides; protein labeling
资金
- National Institutes of Health [F32 GM103162, R01 GM098871]
Macrocyclization is a broadly applied approach for overcoming the intrinsically disordered nature of linear peptides. Herein, it is shown that dichloroacetone (DCA) enhances helical secondary structures when introduced between peptide nucleophiles, such as thiols, to yield an acetone-linked bridge (ACE). Aside from stabilizing helical structures, the ketone moiety embedded in the linker can be modified with diverse molecular tags by oxime ligation. Insights into the structure of the tether were obtained through co-crystallization of a constrained S-peptide in complex with RNAseS. The scope of the acetone-linked peptides was further explored through the generation of N-terminus to side chain macrocycles and a new approach for generating fused macrocycles (bicycles). Together, these studies suggest that acetone linking is generally applicable to peptide macrocycles with a specific utility in the synthesis of stabilized helices that incorporate functional tags.
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