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  • Title: IR (vibrational) CD of peptide beta-turns: a theoretical and experimental study of cyclo-(-Gly-Pro-Gly-D-Ala-Pro-).
    Author: Wyssbrod HR, Diem M.
    Journal: Biopolymers; 1992 Sep; 32(9):1237-42. PubMed ID: 1420990.
    Abstract:
    IR vibrational CD (VCD) has been observed for the cyclic pentapeptide cyclo-(-Gly-Pro-Gly-D-Ala-Pro-) in solution in CDBr3. The observed VCD spectra do not resemble the VCD features of any of the previously reported peptide secondary structures, such as alpha-helical, "random coil," or sheet structures, and might be due to the beta-turn contained in this molecule. To shed light onto the origin of the observed spectra, VCD intensity calculations, based on the solution and solid-state structures of cyclo-(-Gly-Pro-Gly-D-Ala-Pro-), have been carried out. In addition, calculated VCD data for pure beta-turns are discussed.
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