Chloroplast photorelocation movement mediated by phototropin family proteins in green plants
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Abstract
Chloroplasts gather in areas irradiated with weak light to maximize photosynthesis (the accumulation response). They move away from areas irradiated with strong light to minimize damage of the photosynthetic apparatus (the avoidance response). The processes underlying these chloroplast movements can be divided into three parts: photoperception, signal transduction, and chloroplast movement. Photoreceptors for chloroplast movement have been identified recently in various plant species. A blue light receptor phototropin (phot) mediates chloroplast photorelocation movement in the seed plant Arabidopsis thaliana, the fern Adiantum capillus-veneris, the moss Physcomitrella patens and possibly the green alga Mougeotia scalaris. A chimeric photoreceptor between phytochrome and phototropin, neochrome (neo), was found in some advanced ferns and in the green alga M. scalaris. While the mechanism of chloroplast movement is not well understood, it is known that actin filaments play an important role in this process. To understand the molecular mechanisms associated with chloroplast movement, several mutants were isolated in A.thaliana (jac1 and chup1) and the corresponding genes were cloned. In this review, recent progress in photoreceptor research into chloroplast movement in various plant species and the possible factors functioning in signal transduction or the regulation of actin filaments identified in A. thaliana is discussed.
©2007 by Walter de Gruyter Berlin New York
Artikel in diesem Heft
- To our authors, readers and subscribers ‘Just Accepted’ feature at http://www.atypon-link.com/WDG/loi/bchm
- Paper of the Year 2006: Award to Pamela Hamill
- The endosymbiotic origin of organelles: an ancient process still very much in fashion
- Solute channels of the outer membrane: from bacteria to chloroplasts
- Diverse mechanisms and machineries for import of mitochondrial proteins
- Transport of nuclear-encoded proteins into secondarily evolved plastids
- Mechanisms of protein import into thylakoids of chloroplasts
- Molecular machinery of mitochondrial dynamics in yeast
- Chloroplast photorelocation movement mediated by phototropin family proteins in green plants
- Plastid division in an evolutionary context
- Variability of the mitochondrial genome in mammals at the inter-species/intra-species boundary
- Diversity of proteasomal missions: fine tuning of the immune response
- Cellular expression of plasma prekallikrein in human tissues
- Sumoylation of the zinc finger protein ZXDC enhances the function of its transcriptional activation domain
- Josephin domain-containing proteins from a variety of species are active de-ubiquitination enzymes
- Cysteine protease inhibitors reduce brain β-amyloid and β-secretase activity in vivo and are potential Alzheimer's disease therapeutics
Artikel in diesem Heft
- To our authors, readers and subscribers ‘Just Accepted’ feature at http://www.atypon-link.com/WDG/loi/bchm
- Paper of the Year 2006: Award to Pamela Hamill
- The endosymbiotic origin of organelles: an ancient process still very much in fashion
- Solute channels of the outer membrane: from bacteria to chloroplasts
- Diverse mechanisms and machineries for import of mitochondrial proteins
- Transport of nuclear-encoded proteins into secondarily evolved plastids
- Mechanisms of protein import into thylakoids of chloroplasts
- Molecular machinery of mitochondrial dynamics in yeast
- Chloroplast photorelocation movement mediated by phototropin family proteins in green plants
- Plastid division in an evolutionary context
- Variability of the mitochondrial genome in mammals at the inter-species/intra-species boundary
- Diversity of proteasomal missions: fine tuning of the immune response
- Cellular expression of plasma prekallikrein in human tissues
- Sumoylation of the zinc finger protein ZXDC enhances the function of its transcriptional activation domain
- Josephin domain-containing proteins from a variety of species are active de-ubiquitination enzymes
- Cysteine protease inhibitors reduce brain β-amyloid and β-secretase activity in vivo and are potential Alzheimer's disease therapeutics
