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The relationship of the cyclic and non-cyclic electron transport pathways in chloroplasts
Biochimica Et Biophysica Acta - Bioenergetics, 1980Light-induced redox changes of plastocyanin, the Rieske iron-sulfur center, and P-700 have been studied in situ in spinach chloroplasts. Plastocyanin and the Rieske center behaved in an analogous manner in that their steady states were fully oxidized in the light in the presence or absence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea when an electron ...
Richard Malkin +2 more
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Cyclic Electron Transport Around Photosystem I: Genetic Approaches
Annual Review of Plant Biology, 2007The light reactions in photosynthesis convert light energy into chemical energy in the form of ATP and drive the production of NADPH from NADP+. The reactions involve two types of electron flow in the chloroplast. While linear electron transport generates both ATP and NADPH, photosystem I cyclic electron transport is exclusively involved in ATP ...
Toshiharu Shikanai
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The involvement of ferredoxin-NADP+ reductase in cyclic electron transport in chloroplasts
Biochimica Et Biophysica Acta - Bioenergetics, 1981The sites of action, in spinach thylakoid, of known inhibitors of electron transport at the reducing end of photosystem I have been more accurately located by parallel investigation of effects on three partial reactions: photo-reduction (from water) of added NADP+, photoreduction of added cytochrome c, and dark reduction of cyto-chrome c by added NADPH.
Yosepha Shahak +2 more
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Structural insights into photosynthetic cyclic electron transport
Molecular Plant, 2023During photosynthesis, light energy is utilized to drive sophisticated biochemical chains of electron transfers, converting solar energy into chemical energy that feeds most life on earth. Cyclic electron transfer/flow (CET/CEF) plays an essential role in efficient photosynthesis, as it balances the ATP/NADPH ratio required in various regulatory and ...
Shumeng Zhang +6 more
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Partial characterization of cyclic electron transport in intact chloroplasts
Archives of Biochemistry and Biophysics, 1980Turnover of the cyclic electron transfer chain around photosystem I in intact chloroplasts was induced by addition of sodium dithionite after poisoning with 3-(3,4-dichlorophenyl)-1,1-dimethylurea. A substantial permeability barrier to dithionite allowed redox poising to a level sufficiently negative to active, but not overreduce, the cycle.
D, Crowther, G, Hind
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Distinct contribution of two cyclic electron transport pathways to P700 oxidation
Plant Physiology, 2022Abstract Cyclic electron transport (CET) around Photosystem I (PSI) acidifies the thylakoid lumen and downregulates electron transport at the cytochrome b6f complex. This photosynthetic control is essential for oxidizing special pair chlorophylls (P700) of PSI for PSI photoprotection.
Qi Zhou +2 more
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Cytochrome function in the cyclic electron transport pathway of chloroplasts
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1979Flash excitation of isolated intact chloroplasts promoted absorbance transients corresponding to the electrochromic effect (P-518) and the alpha-bands of cytochrome b6 and cytochrome f. Under conditions supporting coupled cyclic electron flow, the oxidation of cytochrome b6 and the reduction of cytochrome f had relaxation half-times of 15 and 17 ms ...
R E, Slovacek, D, Crowther, G, Hind
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