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Vibrational circular dichroism of polypeptides, V. A study of 310-helical-octapeptides

✍ Scribed by Sritana C. Yasui; Timothy A. Keiderling; Gian Maria Bonora; Claudio Toniolo

Publisher
Wiley (John Wiley & Sons)
Year
1986
Tongue
English
Weight
597 KB
Volume
25
Category
Article
ISSN
0006-3525

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✦ Synopsis

We have measured vibrational CD spectra in the 3600-1250 cm-I region of two monodisperse, protected octapeptides, which form right-handed 3,,-helices in CDC13 solution.

The spectra are similar in sign pattern to those obtained for right-handed a-helices in solution but are smaller in magnitude and, additionally, provide evidence of some lineshape differences. The delineation of this type of ordered conformation was accomplished by means of 'H-nmr. Such a solution structure is consistent with the x-ray crystal structure of one of these molecules.

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