Thylakoid Terminal Oxidases Are Essential for the Cyanobacterium Synechocystis sp. PCC 6803 to Survive Rapidly Changing Light Intensities1[C][W][OA]
نویسندگان
چکیده
Department of Biochemistry, University of Cambridge, Cambridge, CB2 1QW United Kingdom (D.J.L-S., D.S.B, C.J.H.); Department of Plant Sciences, University of Cambridge, Cambridge, CB2 3EA United Kingdom (N.R., M.Z., A.G.S.); Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB2 3RA United Kingdom (N.R., J.S.D.); and Department of Engineering, University of Cambridge, Cambridge, CB2 1PZ United Kingdom (S.A.S.)
منابع مشابه
Thylakoid terminal oxidases are essential for the cyanobacterium Synechocystis sp. PCC 6803 to survive rapidly changing light intensities.
Cyanobacteria perform photosynthesis and respiration in the thylakoid membrane, suggesting that the two processes are interlinked. However, the role of the respiratory electron transfer chain under natural environmental conditions has not been established. Through targeted gene disruption, mutants of Synechocystis sp. PCC 6803 were generated that lacked combinations of the three terminal oxidas...
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Various oxygen-utilizing electron sinks, including the soluble flavodiiron proteins (Flv1/3), and the membrane-localized respiratory terminal oxidases (RTOs), cytochrome c oxidase (Cox) and cytochrome bd quinol oxidase (Cyd), are present in the photosynthetic electron transfer chain of Synechocystis sp. PCC 6803. However, the role of individual RTOs and their relative importance compared with o...
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Antibodies raised against NdhH and NdhB detected these proteins in the thylakoid membrane of Synechocystis sp. strain PCC 6803, but not in a purified cytoplasmic membrane. We conclude that NAD(P)H dehydrogenase is largely, if not exclusively, confined to the thylakoid membrane.
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Thylakoid membranes are typical and essential features of both chloroplasts and cyanobacteria. While they are crucial for phototrophic growth of cyanobacterial cells, biogenesis of thylakoid membranes is not well understood yet. Dark-grown Synechocystis sp. PCC 6803 cells contain only rudimentary thylakoid membranes but still a relatively high amount of phycobilisomes, inactive photosystem II a...
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Synechocystis sp. PCC 6803 is a model cyanobacterium extensively used to study photosynthesis. Here we reveal a novel high light-inducible carotenoid-binding protein complex (HLCC) in the thylakoid membranes of Synechocystis PCC 6803 cells exposed to high intensity light. Zeaxanthin and myxoxanthophyll accounted for 29.8% and 54.8%, respectively, of the carotenoids bound to the complex. Using B...
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