A high-potential redox component located within cyanobacterial Photosystem II

Piccioni, Richard G.; Mauzerall, D.

doi:10.1016/0005-2728(78)90062-2

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1978

1987

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Cited by 15 publications

(1 citation statement)

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“…The activity of cell-free preparations from cyanobacteria is specifically dependent on a rather high (10-2 M) concentration of calcium (Piccioni and Mauzerall, 1978a). These preparations are also of interest because they are resistant to the pervasive inhibitor of O 2 evolution, DCMU, and specifically require a high potential (Eo> 0.45 V) Hill oxidant (Piccioni and Mauzerall, (1978b). The calcium does not seem to be required to ensure a proton or ion gradient or to activate the Hill oxident.…”

Section: Requirementsmentioning

confidence: 99%

Photosynthetic Oxygen Production

Mauzerall¹,

Piccioni²

1981

Topics in Environmental Physiology and Medicine

Self Cite

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Section: Requirementsmentioning

confidence: 99%

Photosynthetic Oxygen Production

Mauzerall¹,

Piccioni²

1981

Topics in Environmental Physiology and Medicine

Self Cite

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Stimulation and Inhibition of Photosystem II Electron Transport in Cyanobacteria by Ions Interacting With the Cytoplasmic Face of Thylakoids

Sotiropoulou¹,

Papageorgiou²

1987

Excitation Energy and Electron Transfer in Photosynthesis

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Stimulation and inhibition of photosystem II electron transport in cyanobacteria by ions interacting with the cytoplasmic face of thylakoids

Sotiropoulou

Papageorgiou

1986

Photosynth Res

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The mechanism by which suspension medium ions regulate the rate of photoinduced electron transport across photosystem II was investigated with ion permeabilized cells of the cyanobacterium Anacystis nidulans. Electron transport was measured as the reduction of the electroneutral acceptor dichlorophenol indophenol, whose surface concentration is independent of electrostatic membrane potential. Potassium salts stimulate photoinduced electron transport at low concentrations and inhibit it at higher concentrations. No inhibition is observed when an antichaotropic anion is associated with potassium, while the inhibition is more severe the stronger the chaotropic character of the anion. Neutralization of the surface charge by potassium ions ligated to negatively charged membrane sites at the cytoplasmic side is a prerequisite for the expression of the chaotropic inhibition of photosystem II electron transport.

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A high-potential redox component located within cyanobacterial Photosystem II

Cited by 15 publications

References 19 publications

Photosynthetic Oxygen Production

Photosynthetic Oxygen Production

Stimulation and Inhibition of Photosystem II Electron Transport in Cyanobacteria by Ions Interacting With the Cytoplasmic Face of Thylakoids

Stimulation and inhibition of photosystem II electron transport in cyanobacteria by ions interacting with the cytoplasmic face of thylakoids

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