Relationship between the Stability of Antenna Chl a-Binding Proteins CP43/47 and the Accumulation of the Extrinsic 30-kDa Protein in PS II in Euglena
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概要
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The accumulation of the extrinsic 30-kDa protein of PS II in thylakoid membranes was studied in relation to the assembly of PS II antenna Chl-proteins CP43/47 and light-harvesting Chl a/b-protein (LHC) in greening cells of Euglena. We showed previously that the 30-kDa protein accumulates in the membrane later than the reaction center-binding D1 protein (Mizobuchi and Yamamoto 1989). In the present study, the rate of accumulation of the apoproteins of LHC and CP43/47 was shown to be similar to that of the D1 protein. By contrast, we found by non-denaturing lithium dodecyl sulfate-polyacrylamide gel electrophoresis that, at the early stages of greening, newly assembled antenna Chl a-binding proteins CP43 and CP47 were more susceptible to detergent than were the other Chl-protein complexes. Prolonged illumination was required for the stabilization of CP43 and CP47, and the time course of the light-dependent formation of stable CP43/47 paralleled that of the accumulation of the extrinsic 30-kDa protein. These results are discussed in terms of the relationship between the stabilization of CP43/47 and the accumulation of the 30-kDa protein in the thylakoid membrane and the roles of these two processes in the assembly of the oxygen-evolving system in Euglena are examined.
- 日本植物生理学会の論文
著者
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Mori Hiroki
Department Of Clinical Diagnosis Shujitsu University School Of Pharmacy
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Yamamoto Yasusi
Department Of Biology Faculty Of Science Okayama University
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Yamamoto Yasusi
Department Of Biology Faculty Of Science Kyushu University
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Hiramatsu Hiroyuki
Department of Biology, Faculty of Science Okayama University
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Mizobuchi Akihiro
Department of Biology, Faculty of Science Okayama University
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Hiramatsu Hiroyuki
Department Of Biology Faculty Of Science Okayama University
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Mori Hiroki
Department Of Applied Chemistry Graduate School Of Engineering Hiroshima University
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Mori Hiroki
Department Of Biology Faculty Of Science Okayama University
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Mizobuchi Akihiro
Department Of Biology Faculty Of Science Okayama University
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