Cooperation of plasma and thylakoid membranes for the biosynthesis of chlorophyll in cyanobacteria: the role of the thylakoid centers
作者： Barbara Hinterstoisser , Margit Cichna , Otto Kuntner , Günter A. Peschek
DOI: 10.1016/S0176-1617(11)81245-9
关键词: Thylakoid 、 Protochlorophyllide 、 Protochlorophyllide reductase 、 Light-harvesting complexes of green plants 、 Quantasome 、 Light-dependent reactions 、 Biochemistry 、 F-ATPase 、 Photosystem 、 Biology 、 Agronomy and Crop Science 、 Plant science 、 Physiology
摘要: Summary Discontinuous sucrose density gradient centrifugation was used to isolate four distinct membrane fractions from cell-free extracts of Synechocystis PCC 6803, viz. two chlorophyll-free plasma fractions, a dark-green thylakoid fraction and light-green with buoyant densities 1.066, 1.092, 1.208 1.162g·cm −3 , respectively. The types membranes could not be further resolved by recentrifugation on continuous gradients; each them had its genuine complement cytochrome c oxidase, NADPH-protochlorophyllide reductase, P700, protochlorophyllide chlorophyllide, which explained superposition (mixture) different fractions. Due the high concentration (activity) NADPHprotochlorophyllide chlorophyllide in it is tempting suggest that these are derived centers appear represent contact sites between cytoplasmic (plasma) intracytoplasmic (thylakoid) where synthesized esterified phytol chlorophyll transferred membranes. Our findings will discussed respect long-standing question continuity cyanobacteria.
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