Synthesis and Characterization of Chiral N−O Turns Induced by α-Aminoxy Acids
摘要:
Chiral alpha -aminoxy acids of various side chains were synthesized with high optical purity starting from chiral alpha -amino acids. The conformations of diamides 13a-e, 15, and 16 were probed by using NMR, FT-IR, and CD spectroscopic methods as well as X-ray crystallography. The right-handed turns with eight-membered-ring intramolecular hydrogen bonds between adjacent residues (called the N-O turns) were found to be preferred for D-aminoxy acid residues, and they were independent of the side chains. The rigid chiral N-O turns should have great potential in molecular design.
Provided herein are methods of modulating membrane potential of a cell membrane using self-assembling compounds. Also provided herein are methods of regulating a natural voltage-dependent ion channel in a cell membrane using the self-assembling compounds disclosed herein. Further provided herein are methods of treating, preventing and/or managing a disease that is related to the abnormal membrane potential responses by using the self-assembling compounds disclosed herein.
α-Aminoxy Oligopeptides: Synthesis, Secondary Structure, and Cytotoxicity of a New Class of Anticancer Foldamers
作者:Daniela Diedrich、Ana J. Rodrigues Moita、Anja Rüther、Benedikt Frieg、Guido J. Reiss、Astrid Hoeppner、Thomas Kurz、Holger Gohlke、Steffen Lüdeke、Matthias U. Kassack、Finn K. Hansen
DOI:10.1002/chem.201602521
日期:2016.12.5
secondary structure with increasing pH. The most cytotoxic α‐aminoxy peptides have an increased propensity to take up a 28‐helical conformation in the presence of a model membrane. This indicates a correlation between the 28‐helical conformation and the membranolytic activity observed in mode of action studies, thereby providing novel insights in the folding properties and the biological activity of α‐aminoxy
Hybrid Peptides Based on α‐Aminoxy Acids as Antimicrobial and Anticancer Foldamers
作者:Laura Sinatra、Lisa Kolano、Maik Icker、Stefan R. Fritzsche、Daniela Volke、Ines Gockel、René Thieme、Ralf Hoffmann、Finn K. Hansen
DOI:10.1002/cplu.202000812
日期:2021.6
α-Aminoxy peptides represent an interesting group of peptidomimetics with high proteolyticstability and the ability to fold into specific, predictable secondary structures. Here, we present a series of hybrid peptides consisting of α-aminoxy acids and α-amino acids with cationic and aromatic, hydrophobic side chains in an alternating manner synthesized using an efficient protocol that combines solution-
Structure–activity relationships of novel endomorphin-2 analogues with N–O turns induced by α-aminoxy acids
作者:Jie Wei、Xuan Shao、Maozhen Gong、Beibei Zhu、Yuxin Cui、Yanfeng Gao、Rui Wang
DOI:10.1016/j.bmcl.2005.04.050
日期:2005.6
Endomorphin-2 (H-Tyr-Pro-Phe-Phe-NH2, EM-2) is a putative endogenous mu-opioid receptor ligand. To study the structure-activity relationship against its receptor, we introduced N-O turns into EM-2 and got the analogues with potent affinities for p-opioid receptor. Our results indicated that N-O turn structures at the PrO2-aminoxy-Phe(3) position of EM-2 analogues played important roles for their affinities. These novel analogues with N-O turns provided a new approach to develop potent analgesics related to EM-2. (c) 2005 Elsevier Ltd. All rights reserved.