- Visible-light-induced photodimerization of a photoactive yellow protein (PYP) chromophore model in a single crystal
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The chromophore of the photoactive yellow protein (PYP), the photoreceptor in the photomotility of the bacterium Halorhodospira halophila, is a deprotonated para-coumaric thioester linked to the side residue of a cysteine residue. The photophysics of the
- Nath, Naba K.,Manoj, Kochunnoonny,Gaz, Andrei ?erban,Naumov, Pan?e
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p. 8094 - 8099
(2013/07/27)
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- Development of protein-labeling probes with a redesigned fluorogenic switch based on intramolecular association for no-wash live-cell imaging
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Turn on the switch: Fluorogenic probes for protein labeling based on the photoactive yellow protein (PYP) tag were developed. The fluorescence of the probes is turned off by intramolecular association and switched on by the reversal of this interaction up
- Hori, Yuichiro,Nakaki, Kyohei,Sato, Motoki,Mizukami, Shin,Kikuchi, Kazuya
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supporting information; experimental part
p. 5611 - 5614
(2012/07/28)
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- Photochemical reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state
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We have studied the photochromic reaction of p-hydroxycinnamic-thiophenyl ester in the microcrystalline state. We attributed the fluorescence spectral evolution of the mierocrystal, under UV irradiation, to the photoinduced trans-to-cis isomerization, The photocyclic behavior of the chromophore was demonstrated by cis-to-trans back reaction under a subsequent visible light irradiation. In addition, the [2 + 2] topochemical photocyclodimer was observed as another photoproduct. It is considered that the cooperative photoisomerization is initiated at the local lattice distortion and free spaces around the [2 + 2] cyclodimer near the crystal surface, and the photoisomerization induces larger lattice deformation and further photoisomerization in the interior of the crystal.
- Usman, Anwar,Asahi, Tsuyoshi,Sugiyama, Teruki,Masuhara, Hiroshi,Tohnai, Norimitsu,Miyata, Mikiji
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body text
p. 14233 - 14240
(2011/05/06)
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- Synthesis and evaluation of a novel series of pseudo-cinnamic derivatives as antituberculosis agents
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In an effort to develop potent new antituberculous drugs effective against Mycobacterium tuberculosis, we have prepared series of cinnamic derivatives (thioesters and amides) with 4-hydroxy and 4-alkoxy groups and investigated the in vitro activities of these compounds. Among them some displayed a good in vitro antibacterial activity, such as (E)-N-(2-acetamidoethyl)-3-{4-[(E)-3,7-dimethylocta-2,6-dienyloxy]phenyl}acrylamide 4b that showed a minimum inhibitory concentration of 0.1 μg/mL (0.26 μM) against M. tuberculosis H37Rv.
- Yoya, Georges Koumba,Bedos-Belval, Florence,Constant, Patricia,Duran, Hubert,Daffe, Mamadou,Baltas, Michel
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scheme or table
p. 341 - 343
(2011/02/26)
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- Color regulation and stabilization of chromophore by Cys69 in photoactive yellow protein active center
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Model compounds of PYP chromophore were synthesized and characterized to investigate the role of the Cys69 residue in the active center, which has the intramolecular NH...OC hydrogen bond to the conjugated carbonyl oxygen and thioester linkage of the chro
- Okamoto, Kentaro,Hamada, Norio,Okamura, Taka-Aki,Ueyama, Norikazu,Yamamoto, Hitoshi
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experimental part
p. 3782 - 3791
(2009/10/23)
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- Excited-state relation dynamics of a PYP chromophore model in solution: Influence of the thioester group
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Cis-trans photoisomerization of a photoactive yellow protein chromophore model, the deprotonated trans S-phenyl thio-p-hydroxycinnamate, is studied in aqueous solution by subpicosecond transient absorption and gain spectroscopy. The excited-state deactiva
- Changenet-Barret, Pascale,Espagne, Agathe,Katsonis, Nathalie,Charier, Sandrine,Baudin, Jean-Bernard,Jullien, Ludovic,Plaza, Pascal,Martin, Monique M.
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p. 285 - 291
(2007/10/03)
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- SYNTHESE DE PARAHYDROXYTHIOCINNAMATES DE S-PHENYLE PRECURSEURS D'ESTERS DE S-COA
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S-phenyl 4-hydroxycinnamates are synthesized in good yield from the corresponding acids activated by iminium or pyridinium salts.Prior protection of the phenolic group is unnecessary; competitive Michael addition are generally unobserved.By exchange reaction with CoASH, S-phenyl esters give S-CoA cinnamoylesters which are involved in lignin biosynthesis process.
- Duran,Elisabeth,Duran, Hubert,Cazaux, Louis,Gorrichon, Liliane,Tisnes, Pierre,Sarni, Farid
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p. 143 - 148
(2007/10/02)
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