Fast Photochemistry of Prototypical Phytochromes-A Species vs. Subunit Specific Comparison

Frontiers in Molecular Biosciences
Janne A IhalainenHeli Lehtivuori

Abstract

Phytochromes are multi-domain red light photosensor proteins, which convert red light photons to biological activity utilizing the multitude of structural and chemical reactions. The steady increase in structural information obtained from various bacteriophytochromes has increased understanding about the functional mechanism of the photochemical processes of the phytochromes. Furthermore, a number of spectroscopic studies have revealed kinetic information about the light-induced reactions. The spectroscopic changes are, however, challenging to connect with the structural changes of the chromophore and the protein environment, as the excited state properties of the chromophores are very sensitive to the small structural and chemical changes of their environment. In this article, we concentrate on the results of ultra-fast spectroscopic experiments which reveal information about the important initial steps of the photoreactions of the phytochromes. We survey the excited state properties obtained during the last few decades. The differences in kinetics between different research laboratories are traditionally related to the differences of the studied species. However, we notice that the variation in the excited state properties de...Continue Reading

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Citations

Jun 26, 2018·Physical Chemistry Chemical Physics : PCCP·Nils LenngrenJanne A Ihalainen
Aug 17, 2019·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Eleonora ConsiglieriAba Losi
Jul 31, 2019·International Journal of Molecular Sciences·Qian-Zhao XuChen Song
Apr 25, 2020·The Journal of Physical Chemistry. B·Francisco Velazquez EscobarPeter Hildebrandt

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Methods Mentioned

BETA
NMR
X-ray
circular dichroism

Software Mentioned

Ismatec

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