Trans-cis photoisomerization of a photoactive yellow protein model chromophore in crystalline phase

Anwar Usman*, Hiroshi Masuhara, Tsuyoshi Asahi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

We have studied the photoinduced trans/cis isomerization of the protonated form of p-hydroxycinnamic thiophenyl ester, a model chromophore of the photoactive yellow protein (PYP), in crystalline phase, by both fluorescence and infrared spectroscopies. The conversion from trans to cis configuration is revealed by a shift of the fluorescence peak and by inspection of the infrared maker bands. The crystal packing apparently stabilizes the cis photoproduct, suggesting different environmental effects from the solvent molecules for this model chromophore in liquid solutions or from the amino acid residues for the PYP chromophore.

Original languageEnglish
Pages (from-to)20085-20088
Number of pages4
JournalJournal of Physical Chemistry B
Volume110
Issue number41
DOIs
StatePublished - 19 Oct 2006

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