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Träfflista för sökning "WFRF:(Andersson Em) srt2:(2000-2004)"

Sökning: WFRF:(Andersson Em) > (2000-2004)

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2.
  • Styring, Stenbjörn, et al. (författare)
  • Biogenesis, assembly and turnover of photosystem II units - Discussion
  • 2002
  • Ingår i: Philosophical Transactions of the Royal Society B: Biological Sciences. - : The Royal Society. - 1471-2970. ; 357:1426, s. 1459-1460
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Assembly of photosystem II, a multiprotein complex embedded in the thylakoid membrane, requires stoichiometric production of over 20 protein subunits. Since part of the protein subunits are encoded in the chloroplast genome and part in the nucleus, a signalling network operates between the two genetic compartments in order to prevent wasteful production of proteins. Coordinated synthesis of proteins also takes place among the chloroplast–encoded subunits, thus establishing a hierarchy in the protein components that allows a stepwise building of the complex. In addition to this dependence on assembly partners, other factors such as the developmental stage of the plastid and various photosynthesis–related parameters exert a strict control on the accumulation, membrane targeting and assembly of the PSII subunits. Here, we briefly review recent results on this field obtained with three major approaches: biogenesis of photosystem II during the development of chloroplasts from etioplasts, use of photosystem II–specific mutants and photosystem II turnover during its repair cycle.
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3.
  • Yang, DH, et al. (författare)
  • The redox state of the plastoquinone pool controls the level of the light-harvesting chlorophyll a/b binding protein complex II (LHC II) during photoacclimation - Cytochrome b(6)f deficient Lemna perpusilla plants are locked in a state of high-light acclimation
  • 2001
  • Ingår i: Photosynthesis Research. - 0166-8595 .- 1573-5079. ; 68:2, s. 163-174
  • Tidskriftsartikel (refereegranskat)abstract
    • A cytochrome bf deficient mutant of Lemna perpusilla maintains a constant and lower level of the light-harvesting chl a/b-binding protein complex II (LHC II) as compared to the wild type plants at low-light intensities. Inhibition of the plastoquinone pool reduction increases the LHC II content of the mutant at both low- and high-light intensities but only at high-light intensity in the wild type plants Proteolytic activity against LHC II appears during high-light photoacclimation of wild type plants. However, the acclimative protease is present in the mutant at both light intensities. These and additional results suggest that the plastoquinone redox state serves as the major signal-transducing component in the photoacclimation process affecting both, synthesis and degradation of LHC II and appearance of acclimative LHC II proteolysis. The plastoquinol pool cannot be oxidized by linear electron flow in the mutant plants which are locked in a `high light acclimation state. The cytochrome bf complex may be involved indirectly in the regulation of photoacclimation via 1) regulation of the plastoquinone redox state; 2) regulation of the redox-controlled thylakoid protein kinase allowing exposure of the dephosphorylated LHC II to acclimative proteolysis
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