N
Nir Keren
Researcher at Hebrew University of Jerusalem
Publications - 98
Citations - 3921
Nir Keren is an academic researcher from Hebrew University of Jerusalem. The author has contributed to research in topics: Photosystem II & Photosynthesis. The author has an hindex of 35, co-authored 92 publications receiving 3447 citations. Previous affiliations of Nir Keren include Washington University in St. Louis & Technion – Israel Institute of Technology.
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Mechanism of photosystem II photoinactivation and D1 protein degradation at low light: The role of back electron flow
TL;DR: It is demonstrated that charge recombination in active PSII is promoted by low rates of excitation and may account for a the high quantum efficiency of the rapid turnover of the D1 protein induced by limiting light.
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Homologs of plant PsbP and PsbQ proteins are necessary for regulation of photosystem ii activity in the cyanobacterium Synechocystis 6803.
Leeann E. Thornton,Hiroshi Ohkawa,Johnna L. Roose,Yasuhiro Kashino,Nir Keren,Himadri B. Pakrasi +5 more
TL;DR: Findings indicate that both PsbP and PsbQ proteins are regulators that are necessary for the biogenesis of optimally active PSII in Synechocystis 6803, and that five extrinsic PSII proteins are present in cyanobacteria, two of which have been lost during the evolution of green plants.
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Metal Homeostasis in Cyanobacteria and Chloroplasts. Balancing Benefits and Risks to the Photosynthetic Apparatus
Sigal Shcolnick,Nir Keren +1 more
TL;DR: Iron (Fe), manganese (Mn), magnesium (Mg), and copper (Cu) are essential cofactors for the operation of the oxygenic photosynthetic electron transfer apparatus.
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Critical roles of bacterioferritins in iron storage and proliferation of cyanobacteria.
TL;DR: Results support the presence of a heteromultimeric structure of Synechocystis bacterioferritin, in which one subunit ligates a di-iron center while the other accommodates heme binding, thus demonstrating a central role of bacterioFERritins in iron homeostasis in these photosynthetic organisms.
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Iron bioavailability to phytoplankton: an empirical approach.
TL;DR: Analysis of iron uptake from various Fe substrates by several species of phytoplankton grown under conditions of Fe limitation suggests that the uptake rate constant of Fe-limited phy toplankon has reached a universal upper limit and provides insight into the underlying uptake mechanism.