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DESIGN AND PHOTOFUNCTIONS OF DENDRIMER-ENCAPSULATED POLY(PHENYLENEETHYNYLENE)S

Chinese Journal of Polymer Science 2001年第2期19卷 161-166页

作者： Takafumi Sato Takuzo Aida Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 JapanDepartment of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

A series of dendrimer-encapsulated poly(phenyleneethynylene)s 4～6 were Synthesize d. The light-harvesting antenna functions of dendrimer frameworks together with the blue-light emitting activities of 4～6 were highli... 详细信息

关键词： Dendrimer Poly(phenyleneethynylene) Molecular wire light-harvesting antenna Energy transfer

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Integration of Carbon Assimilation Modes with Photosynthetic light Capture in the Green Alga Chlamydomonas reinhardtii

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Molecular Plant 2014年第10期7卷 1545-1559页

作者： Hanna Bergera Olga Blifernez-Klassen Matteo Ballottari Roberto Bassi Lutz Wobbe Olaf Kruse Bielefeld University Faculty of Biology Center for Biotechnology (CeBiTec) Universitatsstrasse 27 33615 Bielefeld Germany Universita degli Studi di Verona Department of Biotechnology strada Le Grazie 15 37134 Verona Italy

The unicellular green alga Chlamydomonas reinhardtii is capable of using organic and inorganic carbon sources simultaneously, which requires the adjustment of photosynthetic activity to the prevailing mode of carbon assimilation. We obtained novel insights into the regulation of light-harvesting at photosystem II （PSII） following altered carbon source avail- ability. In C. reinhardtii, synthesis of PSll-associated light-harvesting proteins （LHCBMs） is controlled by the cytosolic RNA- binding protein NAB1, which represses translation of particular LHCBM isoform transcripts. This mechanism is fine-tuned via regulation of the nuclear NAB1 promoter, which is activated when linear photosynthetic electron flow is restricted by CO2- limitation in a photoheterotrophic context. In the wild-type, accumulation of NAB1 reduces the functional PSII antenna size, thus preventing a harmful overexcited state of PSII, as observed in a NABl-less mutant. We further demonstrate that trans- lation control as a newly identified long-term response to prolonged CO2-1imitation replaces LHCII state transitions as a fast response to PSII over-excitation. Intriguingly, activation of the long-term response is perturbed in state transition mutant stt7, suggesting a regulatory link between the long- and short-term response. We depict a regulatory circuit operating on distinct timescales and in different cellular compartments to fine-tune light-harvesting in photoheterotrophic eukaryotes.

关键词： light-harvesting antenna translation control state transitions NAB1 carbon metabolism Chlamydomonasreinhardtii.

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