Abstract
Long-range communication of stereochemical information is common in biological systems, particularly in enzyme-catalysed reactions. Here, we report the remote control of the dynamic chirality of metal centres, coordinated by 2,2′-bipyridine ligands bearing dynamic helical oligopeptides. The helical chirality of the oligopeptides is controlled by a stereocentre remote from the metal. We show that when a mixture of chiral and achiral peptide ligands is used, both the chirality of the metal centre and that of the achiral oligopeptide helices are significantly amplified. The amplification mechanism relies on several steps of chirality induction, first from a single chiral peptide to the helicity of an oligopeptide through the induction of propeller chirality at the metal centre, then on to induction of helical chirality in an achiral oligopeptide.
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Acknowledgements
This work was supported in part by a Grant-in-Aid for Scientific Research (S) from the Japan Society for the Promotion of Science (JSPS) (no. 20225006) and the Global COE Program ‘Elucidation and Design of Materials and Molecular Functions’ of the Ministry of Education, Culture, Sports, Science, and Technology, Japan. N.O. expresses thanks for a JSPS Postdoctoral Fellowship for Young Scientists (no. 2692). The authors thank K. Yoza and Y. Furusho for their help with X-ray crystallographic analysis.
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E.Y. designed and directed the project. N.O. conceived and designed the experiments. N.O., Y.T. and H.I. performed the experiments. E.Y. and N.O. analysed the data and co-wrote the paper.
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Ousaka, N., Takeyama, Y., Iida, H. et al. Chiral information harvesting in dendritic metallopeptides. Nature Chem 3, 856–861 (2011). https://doi.org/10.1038/nchem.1146
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DOI: https://doi.org/10.1038/nchem.1146
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