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Proc Natl Acad Sci U S A. 2001 Sep 25;98(20):11254-8. Epub 2001 Sep 11.

Subpicosecond conformational dynamics of small peptides probed by two-dimensional vibrational spectroscopy.

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1
Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Strasse 2A, D-12489 Berlin, Germany.

Abstract

The observation of subpicosecond fluctuations in the conformation of a small peptide in water is demonstrated. We use an experimental method that is specifically sensitive to conformational dynamics taking place on an ultrafast time scale. Complementary molecular-dynamics simulations confirm that the conformational fluctuations exhibit a subpicosecond component, the time scale and amplitude of which agree well with those derived from the experiment.

PMID:
11553784
PMCID:
PMC58716
DOI:
10.1073/pnas.201169498
[Indexed for MEDLINE]
Free PMC Article
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