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Elsevier, Chemical Physics Letters, 1-3(483), p. 133-137

DOI: 10.1016/j.cplett.2009.10.059

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Picosecond transient circular dichroism of the photoreceptor protein of the light-adapted form of Blepharisma japonicum

Journal article published in 2009 by Francois Hache, Mai-Thu Khuc, Johanna Brazard, Pascal Plaza, Monique M. Martin, Giovanni Checcucci, Francesco Lenci
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

We present a picosecond transient circular dichroism study of OBIP, the putative photoreceptor protein involved in the photophobic response of Blepharisma Japonicum. The probe wavelength was chosen at 230 nm. The results are compared to those of the isolated chromophore, OxyBP, in solution. The CD changes in OBIP and OxyBP do not show the same dynamics: OBIP's signal relaxes in a few ps whereas no such decay is obtained for OxyBP. This observation brings support to the formerly evoked existence of a fast photoinduced reaction in the chromoprotein, and demonstrates the implication of local geometrical changes that accompany this process.