Mechanistic Pathways for the Photoisomerization Reaction of the Anchored, Tethered Chromophore of the Photoactive Yellow Protein and its Mutants¶

Yasushi Imamoto; Mikio Kataoka; Robert S. H. Liu

doi:10.1562/0031-8655(2002)076<0584:MPFTPR>2.0.CO;2

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1 December 2002 Mechanistic Pathways for the Photoisomerization Reaction of the Anchored, Tethered Chromophore of the Photoactive Yellow Protein and its Mutants

Yasushi Imamoto, Mikio Kataoka, Robert S. H. Liu

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Yasushi Imamoto,¹ Mikio Kataoka,¹ Robert S. H. Liu^2,*

¹aGraduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan
²bUniversity of Hawaii, Department of Chemistry, Honolulu, HI

^**To whom correspondence should be addressed at: Department of Chemistry, University of Hawaii, 2545 The Mall, Honolulu, HI 96822, USA. Fax: 808-956-5908; rliu@gold.chem.hawaii.edu

Photochemistry and Photobiology, 76(6):584-589 (2002). https://doi.org/10.1562/0031-8655(2002)076<0584:MPFTPR>2.0.CO;2

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Abstract

We show by way of physical organic reasoning that the currently known photochemical results of the chromophore of photoactive yellow protein (PYP) are consistent with that expected of a least volume-demanding process for an anchored, tethered chromophore. The primary photoreaction, interestingly, does not appear to involve a hula-twist process. However, the latter might be involved during subsequent transition of dark intermediates. Absorption data of intermediates obtained from a microsecond time-resolved spectroscopic study of three PYP mutants (E46Q, T50V and R52Q) are consistent with the above analyses.

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Yasushi Imamoto, Mikio Kataoka, and Robert S. H. Liu "Mechanistic Pathways for the Photoisomerization Reaction of the Anchored, Tethered Chromophore of the Photoactive Yellow Protein and its Mutants," Photochemistry and Photobiology 76(6), 584-589, (1 December 2002). https://doi.org/10.1562/0031-8655(2002)076<0584:MPFTPR>2.0.CO;2

Received: 30 May 2002; Accepted: 1 September 2002; Published: 1 December 2002

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Photochemistry and Photobiology

Photochemistry and Photobiology
Vol. 76 • No. 6
December 2002

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Yasushi Imamoto, Mikio Kataoka, Robert S. H. Liu "Mechanistic Pathways for the Photoisomerization Reaction of the Anchored, Tethered Chromophore of the Photoactive Yellow Protein and its Mutants," Photochemistry and Photobiology, 76(6), 584-589, (1 December 2002)

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