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Cited by 327

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Theoretical CD studies of polypeptide helices: Examination of important electronic and geometric factors

Manning, Mark C., Woody, Robert W.·1991·Biopolymers

Abstract

An improved model for calculating the CD of polypeptides has been developed. Excited state wavefunctions were derived from CNDO/S (complete neglect of differential overlap, spectroscopic) calculations on N‐methylacetamide. Four discrete peptide‐localized transitions were employed: π 0 π*(NV 1), π+π* (NV 2), n π*, and n′π*. Inclusion of the π+π*transition (λ 0 = 140 nm) significantly improves the accuracy of the calculated CD spectra in the 180‐250‐nm region. Spectra were computed for various helical structures, including right‐handed α‐, α II‐, ω‐, π‐, 3 10‐, and poly(proline)I‐helices, and the left‐handed poly(proline)II‐helix. Sensitivity to changes in the peptide backbone geometry and chain length are examined. Electronic factors such as ground‐state charge distribution, hybridization effects, and basis set deorthogonalization have been investigated. The nonconservative nature of the poly (Pro) I and II CD spectra is reproduced, and the helix band present in earlier exciton calculations on the α‐helix has been diminished.

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Metadata

Authors
Manning, M. C., & Woody, R. W.
Venue
Biopolymers
Publisher
Wiley
Published
1991-04
Volume
31
Issue
5
Pages
569-586
ISSN
  • 0006-3525 (ISSN-L)
  • 1097-0282
OpenAlex
W1979528014
Cited by
327
References
24
FWCI
2.66
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Theoretical CD studies of polypeptide helices: Examination of important electronic and geometric factors. https://app.cochat.ai/papers/10.1002/bip.360310511
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Manning, M. C., & Woody, R. W. (1991). Theoretical CD studies of polypeptide helices: Examination of important electronic and geometric factors. Biopolymers. https://doi.org/10.1002/bip.360310511

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