Redox regulation of helical structures in short peptides with an intramolecular ferrocenyl cross-linking agent |
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Authors: | Fujimoto Kazuhisa Kawai Hirokazu Amano Miwo Inouye Masahiko |
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Institution: | Graduate School of Pharmaceutical Sciences, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan. fujimoto@pha.u-toyama.ac.jp |
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Abstract: | We redox-regulated alpha-helicity of short peptides intramolecularly cross-linked with a ferrocenyl linker between amino acid side chains. The helical content of the cross-linked peptide was estimated to be 56% in the neutral state of the ferrocene core at 25 degrees C. The addition of an oxidant to the solution of the cross-linked peptide enhanced the helicity up to 75%. The increased helical content returned to the same level as that in the previous ferrocene state by further addition of a reductant. |
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