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Stitched α-Helical Peptides via Bis Ring-Closing Metathesis

Hilinski, Gerard J., Kim, Young-Woo, Hong, Jooyeon, Kutchukian, Peter S., Crenshaw, Charisse M., Berkovitch, Shaunna S., Chang, Andrew, Ham, Sihyun, Verdine, Gregory L.·2014·Journal of the American Chemical Society

Abstract

Conformationally stabilized α-helical peptides are capable of inhibiting disease-relevant intracellular or extracellular protein-protein interactions in vivo. We have previously reported that the employment of ring-closing metathesis to introduce a single all-hydrocarbon staple along one face of an α-helical peptide greatly increases α-helical content, binding affinity to a target protein, cell penetration through active transport, and resistance to proteolytic degradation. In an effort to improve upon this technology for stabilizing a peptide in a bioactive α-helical conformation, we report the discovery of an efficient and selective bis ring-closing metathesis reaction leading to peptides bearing multiple contiguous staples connected by a central spiro ring junction. Circular dichroism spectroscopy, NMR, and computational analyses have been used to investigate the conformation of these "stitched" peptides, which are shown to exhibit remarkable thermal stabilities. Likewise, trypsin proteolysis assays confirm the achievement of a structural rigidity unmatched by peptides bearing a single staple. Furthermore, fluorescence-activated cell sorting (FACS) and confocal microscopy assays demonstrate that stitched peptides display superior cell penetrating ability compared to their stapled counterparts, suggesting that this technology may be useful not only in the context of enhancing the drug-like properties of α-helical peptides but also in producing potent agents for the intracellular delivery of proteins and oligonucleotides.

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Metadata

Authors
Hilinski, G. J., Kim, Y.-W., Hong, J., Kutchukian, P. S., Crenshaw, C. M., Berkovitch, S. S., Chang, A., Ham, S., & Verdine, G. L.
Venue
Journal of the American Chemical Society
Published
2014-08-21
Volume
136
Issue
35
Pages
12314-12322
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2312496963
Cited by
164
References
9
FWCI
5.60
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Stitched α-Helical Peptides via Bis Ring-Closing Metathesis. https://app.cochat.ai/papers/10.1021/ja505141j
The paper
Hilinski, G. J., Kim, Y.-W., Hong, J., Kutchukian, P. S., Crenshaw, C. M., Berkovitch, S. S., Chang, A., Ham, S., & Verdine, G. L. (2014). Stitched α-Helical Peptides via Bis Ring-Closing Metathesis. Journal of the American Chemical Society. https://doi.org/10.1021/ja505141j

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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