Influence of α-methylation in constructing stapled peptides with olefin metathesis
摘要:
Ring-closing metathesis is commonly utilized in peptide macro-cyclization. The influence of alpha-methylation of the amino acids bearing the olefin moieties has never been systematically studied. In this report, controlled reactions unambiguously indicate that alpha-methylation at the N-terminus of the metathesis sites is crucial for this reaction to occur. Also, we first elucidated that the E-isomers of stapled peptides are significantly more helical than the Z-isomers. (C) 2014 Elsevier Ltd. All rights reserved.
Constrained Peptides with Target-Adapted Cross-Links as Inhibitors of a Pathogenic Protein-Protein Interaction
作者:Adrian Glas、David Bier、Gernot Hahne、Christoph Rademacher、Christian Ottmann、Tom N. Grossmann
DOI:10.1002/anie.201310082
日期:2014.2.24
Bioactive conformations of peptides can be stabilized by macrocyclization, resulting in increased target affinity and activity. Such macrocyclic peptides proved useful as modulators of biological functions, in particular as inhibitors of protein–proteininteractions (PPI). However, most peptide‐derived PPI inhibitors involve stabilized α‐helices, leaving a large number of secondary structures unaddressed
Design of Cell-Permeable Stapled Peptides as HIV-1 Integrase Inhibitors
作者:Ya-Qiu Long、Shao-Xu Huang、Zahrah Zawahir、Zhong-Liang Xu、Huiyuan Li、Tino W. Sanchez、Ying Zhi、Stephanie De Houwer、Frauke Christ、Zeger Debyser、Nouri Neamati
DOI:10.1021/jm4006516
日期:2013.7.11
HIV-1 integrase (IN) catalyzes the integration of viral DNA into the host genome involving several interactions with the viral and cellular proteins. We have previously identified peptide IN inhibitors derived from the a-helical regions along the dimeric interface of HIV-1 IN. Herein, we show that appropriate hydrocarbon stapling of these peptides to stabilize their., helical structure remarkably improves the cell permeability, thus allowing inhibition of the HIV-1 replication in cell culture. Furthermore, the stabilized peptides inhibit the interaction of IN with the cellular cofactor LEDGF/p75. Cellular uptake of the stapled peptide was confirmed in four different cell lines using a fluorescein-labeled analogue. Given their enhanced potency and cell permeability, these stapled peptides can serve as not only lead IN inhibitors but also prototypical biochemical probes or "nanoneedles" for the elucidation of HIV-1 IN dimerization and host cofactor interactions within their native cellular environment.
An All-Hydrocarbon Cross-Linking System for Enhancing the Helicity and Metabolic Stability of Peptides
作者:Christian E. Schafmeister、Julia Po、Gregory L. Verdine
DOI:10.1021/ja000563a
日期:2000.6.1
Helix stabilization by stapled N-capping box
作者:Thanh K. Pham、Young-Woo Kim
DOI:10.1016/j.bioorg.2020.104024
日期:2020.8
The N-capping box is a distinct helix-stabilizing motif frequently found in proteins. In this study, we examined a ruthenium-mediated intramolecular backbone to side chain macrocyclization as a rigidified mimicry of the N-capping box. Experimental data indicate that the 15-membered macrocycle formed by a hept-4-enoyl staple, which directly tethers the alpha-amino group of N1 residue and the alpha-carbon of N3 residue, is highly effective in stabilizing helical structures of short peptides.