- Beta Sheets with a Twist: The Conformation of Helical Polyisocyanopeptides Determined by Using Vibrational Circular Dichroism
- Chemistry - A European Journal
- Volume | Issue number
- 19 | 39
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Van 't Hoff Institute for Molecular Sciences (HIMS)
Detailed information on the architecture of polyisocyanopeptides based on vibrational circular dichroism (VCD) spectroscopy in combination with DFT calculations is presented. It is demonstrated that the screw sense of the helical polyisocyanides can be determined directly from the CN-stretch vibrational region of the VCD spectrum. Analysis of the VCD signals associated with the amideI and amideII modes provides detailed information on the peptide side-chain arrangement in the polymer and indicates the presence of a helical -sheet architecture, in which the dihedral angles are slightly different to those of natural -sheet helices.
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