Cited by 141Chemical Synthesis and AnalysisCell death mechanisms and regulationSupramolecular Self-Assembly in Materials

Stabilizing the Pro-Apoptotic BimBH3 Helix (BimSAHB) Does Not Necessarily Enhance Affinity or Biological Activity

Okamoto, Toru, Zobel, Kerry, Fedorova, Anna, Quan, Clifford, Yang, Hong, Fairbrother, Wayne J., Huang, David C. S., Smith, Brian J. +2 more·2013·ACS Chemical Biology

Abstract

An attractive approach for developing therapeutic peptides is to enhance binding to their targets by stabilizing their α-helical conformation, for example, stabilized BimBH3 peptides (BimSAHB) designed to induce apoptosis. Unexpectedly, we found that such modified peptides have reduced affinity for their targets, the pro-survival Bcl-2 proteins. We attribute this loss in affinity to disruption of a network of stabilizing intramolecular interactions present in the bound state of the native peptide. Altering this network may compromise binding affinity, as in the case of the BimBH3 stapled peptide studied here. Moreover, cells exposed to these peptides do not readily undergo apoptosis, strongly indicating that BimSAHB is not inherently cell permeable.

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Crossref · 10.1021/cb3005403

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Authors
Okamoto, T., Zobel, K., Fedorova, A., Quan, C., Yang, H., Fairbrother, W. J., Huang, D. C. S., Smith, B. J., Deshayes, K., & Czabotar, P. E.
Affiliations
  • The University of Melbourne (AU)
  • Genentech (US)
Corresponding author
  • Smith, Brian J.
  • Deshayes, Kurt
  • Czabotar, Peter E.
Venue
ACS Chemical Biology
Published
2012-12-10
Volume
8
Issue
2
Pages
297-302
ISSN
  • 1554-8929 (ISSN-L)
  • 1554-8937
OpenAlex
W2007141443
Cited by
136
References
27
Citations by year
2026: 1 · 2025: 3 · 2024: 6 · 2023: 4 · 2022: 4 · 2021: 9 · 2020: 8 · 2019: 12 · 2018: 4 · 2017: 9 · 2016: 19 · 2015: 19 · 2014: 22 · 2013: 14
FWCI
7.20
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Chemical Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Physical Sciences › Materials Science › Biomaterials › Supramolecular Self-Assembly in Materials
Keywords
peptide stabilization, alpha-helical conformation, Bcl-2 family proteins, binding affinity, intramolecular interactions, stapled peptides, apoptosis induction, membrane permeability, peptide therapeutics
MeSH terms
Animals, Humans, Models, Molecular, Peptide Fragments, Proto-Oncogene Proteins, Apoptosis, Protein Structure, Secondary, Mice

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