Signal transduction in the photoactive yellow protein. I. Photon absorption and the isomerization of the chromophore

Groenhof, G., Lensink, M. F., Berendsen, H. J. C., Snijders, J. G. and Mark, A. E. (2002) Signal transduction in the photoactive yellow protein. I. Photon absorption and the isomerization of the chromophore. Proteins-structure Function And Genetics, 48 2: 202-211. doi:10.1002/prot.10136


Author Groenhof, G.
Lensink, M. F.
Berendsen, H. J. C.
Snijders, J. G.
Mark, A. E.
Title Signal transduction in the photoactive yellow protein. I. Photon absorption and the isomerization of the chromophore
Journal name Proteins-structure Function And Genetics   Check publisher's open access policy
ISSN 0887-3585
Publication date 2002-01-01
Sub-type Article (original research)
DOI 10.1002/prot.10136
Volume 48
Issue 2
Start page 202
End page 211
Total pages 10
Place of publication New York
Publisher Wiley-liss
Language eng
Abstract Molecular dynamics simulation techniques together with time-dependent density functional theory calculations have been used to investigate the effect of photon absorption by a 4-hydroxy-cinnamic acid chromophore on the structural properties of the photoactive yellow protein (PYP) from Ectothiorodospira halophila. The calculations suggest that the protein not only modifies the absorption spectrum of the chromophore but also regulates the subsequent isomerization of the chromophore by stabilizing the isomerization transition state. Although signaling from PYP is thought to involve partial unfolding of the protein, the mechanical effects accompanying isomerization do not appear to directly destabilize the protein. (C) 2002 Wiley-Liss, Inc.
Keyword Biochemistry & Molecular Biology
Biophysics
photoactive yellow protein
signal transduction
photon absorption
photoisomerization
molecular dynamics
time-dependent DFT
Molecular-dynamics
Photocycle Intermediate
Semiempirical Methods
Fold
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Chemistry and Molecular Biosciences
 
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Created: Thu, 20 Sep 2007, 01:26:31 EST