The role of different structural motifs in the ultrafast dynamics of second generation protein stains

Soumit Chatterjee, Peter Karuso, Agathe Boulangé, Philippe A. Peixoto, Xavier Franck, Anindya Datta

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Engineering the properties of fluorescent probes through modifications of the fluorophore structure has become a subject of interest in recent times. By doing this, the photophysical and photochemical properties of the modified fluorophore can be understood and this can guide the design and synthesis of better fluorophores for use in biotechnology. In this work, the electronic spectra and fluorescence decay kinetics of four analogues of the fluorescent natural product epicocconone were investigated. Epicocconone is unique in that the native state is weakly green fluorescent, whereas the enamine formed reversibly with proteins is highly emissive in the red. It was found that the ultrafast dynamics of the analogues depends profoundly on the H-bonding effect of solvents and solvent viscosity though solvent polarity also plays a role. Comparing the steady state and time-resolved data, the weak fluorescence of epicocconone in its native state is most likely due to the photoisomerization of the hydrocarbon side chain, while the keto enol moiety also has a role to play in determining the fluorescence quantum yield. This understanding is expected to aid the design of better protein stains from the same family.

LanguageEnglish
Pages14951-14959
Number of pages9
JournalJournal of Physical Chemistry B
Volume117
Issue number48
DOIs
Publication statusPublished - 5 Dec 2013

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Fluorophores
Coloring Agents
Fluorescence
proteins
Proteins
fluorescence
analogs
Photoisomerization
biotechnology
Quantum yield
Biotechnology
Hydrocarbons
Biological Products
Fluorescent Dyes
electronic spectra
polarity
hydrocarbons
engineering
Viscosity
viscosity

Cite this

Chatterjee, Soumit ; Karuso, Peter ; Boulangé, Agathe ; Peixoto, Philippe A. ; Franck, Xavier ; Datta, Anindya. / The role of different structural motifs in the ultrafast dynamics of second generation protein stains. In: Journal of Physical Chemistry B. 2013 ; Vol. 117, No. 48. pp. 14951-14959.
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The role of different structural motifs in the ultrafast dynamics of second generation protein stains. / Chatterjee, Soumit; Karuso, Peter; Boulangé, Agathe; Peixoto, Philippe A.; Franck, Xavier; Datta, Anindya.

In: Journal of Physical Chemistry B, Vol. 117, No. 48, 05.12.2013, p. 14951-14959.

Research output: Contribution to journalArticleResearchpeer-review

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