PMID: 16593332Jul 1, 1983

Photosynthetic electron transport from water to NADP driven by photosystem II in inside-out chloroplast vesicles

Proceedings of the National Academy of Sciences of the United States of America
P A AlbertssonD I Arnon


It is now widely held that the light-induced noncyclic (linear) electron transport from water to NADP(+) requires the collaboration in series of the two photosystems that operate in oxygen-evolving cells: photosystem II (PSII) photooxidizes water and transfers electrons to photosystem I (PSI); PSI photoreduces ferredoxin, which in turn reduces NADP(+) (the Z scheme). However, a recently described alternative scheme envisions that PSII drives the noncyclic electron transport from water to ferredoxin and NADP(+) without the collaboration of PSI, whose role is limited to cyclic electron transport [Arnon, D. I., Tsujimoto, H. Y. & Tang, G. M.-S. (1981) Proc. Natl. Acad. Sci. USA 78, 2942-2946]. Reported here are findings at variance with the Z scheme and consistent with the alternative scheme. Thylakoid membrane vesicles were isolated from spinach chloroplasts by the two-phase aqueous polymer partition method. Vesicles, originating mainly from appressed chloroplast membranes that are greatly enriched in PSII, were turned inside-out with respect to the original sidedness of the membrane. With added plastocyanin, ferredoxin, and ferredoxin-NADP(+) reductase, the inside-out vesicles enriched in PSII gave a significant photoreduction o...Continue Reading


Dec 1, 1975·Proceedings of the National Academy of Sciences of the United States of America·D I Arnon, R K Chain
Sep 7, 1978·Biochimica Et Biophysica Acta·B Andersson, H E Akerlund
Dec 6, 1976·Biochimica Et Biophysica Acta·H E AkerlundP A Albertsson
Nov 1, 1968·Proceedings of the National Academy of Sciences of the United States of America·B D MCSWAIN, D I Arnon
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Dec 31, 1981·Biochemical and Biophysical Research Communications·R P Cox, B Andersson
Aug 28, 1954·Nature·D I ArnonF R Whatley
Sep 1, 1963·Proceedings of the National Academy of Sciences of the United States of America·K TAGAWAD I Arnon
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Feb 1, 1983·Proceedings of the National Academy of Sciences of the United States of America·J M Anderson, A Melis
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Sep 1, 1982·Proceedings of the National Academy of Sciences of the United States of America·E Lam, R Malkin


Nov 1, 1995·Photosynthesis Research·B B Buchanan, K Tagawa
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