Subunit Structure of Chloroplast Photosystem I Reaction Center
نویسندگان
چکیده
منابع مشابه
Subunit structure of chloroplast photosystem I reaction center.
Purified Photosystem I reaction center preparation catalyzed a plastocyanin-dependent cytochrome f photooxidation. Euglena cytochrome 552 replaced plastocyanin in all photochemical reactions catalyzed by the purified reaction center and was also photooxidized. A reaction center preparation lacking Subunit III was obtained by means of Triton X-100 treatment and DEAEcellulose chromatography or su...
متن کاملSubunit stoichiometry of the chloroplast photosystem I complex.
A native photosystem I (PS I) complex and a PS I core complex depleted of antenna subunits has been isolated from the uniformly 14C-labeled aquatic higher plant, Lemna. These complexes have been analyzed for their subunit stoichiometry by quantitative sodium dodecyl sulfate-polyacrylamide gel electrophoresis methods. The results for both preparations indicate that one copy of each high molecula...
متن کاملPrimary photochemistry of the reaction center of photosystem I.
The earliest primary photochemical reaction of green plant photosynthesis has, thus far, remained unexplored as reaction center chlorophyll a (Chl a) complexes have not yet been isolated [l] . In contrast, primary photochemical steps have been successfully studied, with picosecond (ps) absorption spectroscopy [2,3] in isolated bacteriochlorophyll (B Chl)-reaction center complexes from photosynt...
متن کاملRegulation of synthesis of the photosystem I reaction center
The in vivo biosynthesis of the P700 chlorophyll a-apoprotein was examined to determine whether this process is light regulated and to determine its relationship to chlorophyll accumulation during light-induced chloroplast development in barley (Hordeum vulgare L.). Rabbit antibodies to the 58,000-62,000-mol-wt apoprotein were used to measure relative synthesis rates by immunoprecipitation of i...
متن کاملPhosphatidylglycerol is essential for oligomerization of photosystem I reaction center.
Our earlier studies with the pgsA mutant of Synechocystis PCC6803 demonstrated the important role of phosphatidylglycerol (PG) in PSII dimer formation and in electron transport between the primary and secondary electron-accepting plastoquinones of PSII. Using a long-term depletion of PG from pgsA mutant cells, we could induce a decrease not only in PSII but also in PSI activity. Simultaneously ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1977
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)40199-2