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Showing 1–12 of 12 results
Advanced filters: Author: Marc M. Nowaczyk Clear advanced filters

  • Photosystems need auxiliary proteins to assist their assembly. Cryo-electron microscopy of a cyanobacterial photosystem II assembly intermediate at 2.94 Å reveals mechanisms protecting against photodamage during vulnerable stages of biogenesis.

    • Jure Zabret
    • Stefan Bohn
    • Marc M. Nowaczyk
    Research
    Nature Plants
    Volume: 7, P: 524-538

  • Cyanobacteria evolved carbon-concentration mechanisms to enhance the efficiency of photosynthetic CO2 fixation, but the molecular principles have remained unknown. Here authors use cryo-EM to reveal how modular adaptations enabled the photosynthetic complex I from the cyanobacterium Thermosynechococcus elongatus to concentrate CO2.

    • Jan M. Schuller
    • Patricia Saura
    • Ville R. I. Kaila
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-7

  • Photosynthetic Complex I (PS-CI) is proposed to couple ferredoxin oxidation and plastoquinone reduction to proton pumping across thylakoid membranes. Here the authors determine the reduction potentials of the iron-sulphur clusters of PS-CI and thus the bioenergetics of the electron transfer relay.

    • Katherine H. Richardson
    • John J. Wright
    • Maxie M. Roessler
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-8

  • Semi-artificial photosynthetic systems combine natural and synthetic features to overcome limitations of each approach to produce solar fuels. Sokol et al. integrate a dye-sensitized TiO2 photoanode with the natural machineries, photosystem II and hydrogenase, to split water without additional applied bias.

    • Katarzyna P. Sokol
    • William E. Robinson
    • Erwin Reisner
    Research
    Nature Energy
    Volume: 3, P: 944-951

  • By using in vivo ultrafast TA spectroscopy, extraction of electrons directly from photoexcited PSI and PSII in cyanobacterial cells using exogenous electron mediators is demonstrated.

    • Tomi K. Baikie
    • Laura T. Wey
    • Jenny Z. Zhang
    Research
    Nature
    Volume: 615, P: 836-840

  • Interfacing photosynthetic proteins and electrodes for investigating light-induced charge separation remains challenging. The discovery of a competing charge transfer pathway through the light-harvesting antenna defines new design requirements for electrode modification.

    • Marc M Nowaczyk
    • Nicolas Plumeré
    News & Views
    Nature Chemical Biology
    Volume: 12, P: 990-991

  • Photobiodevices use photosynthetic proteins such as those of the photosystem 1 (PS1) to enable light-induced charge separation, but they suffer from limited long-term stability. Here authors employ scanning photoelectrochemical microscopy on a PS1 biocathode and find that several pathways generate oxygen radicals.

    • Fangyuan Zhao
    • Steffen Hardt
    • Felipe Conzuelo
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-9

  • Photosystem I (PSI) mediates light-driven electron transfer to the protein ferredoxin (Fd). The trimeric PSI–Fd complex from a cyanobacterium has one Fd more tightly bound than the other two, suggesting a mechanism for fast electron transfer.

    • Hisako Kubota-Kawai
    • Risa Mutoh
    • Genji Kurisu
    Research
    Nature Plants
    Volume: 4, P: 218-224

  • Çoruh, Frank et al. report the structure of monomeric Photosystem I from cyanobacteria Thermosynechoccocus elongatus BP-1. They assign monomerization-induced loss of red chlorophylls to a cluster of chlorophylls adjacent to PsaX. This study suggests a role of PsaX in the stabilization of red chlorophylls.

    • Orkun Çoruh
    • Anna Frank
    • Genji Kurisu
    ResearchOpen Access
    Communications Biology
    Volume: 4, P: 1-16

  • Extensive records exist with which to assess the relationship between external climate forcings — such as changes in insolation — and climate variability for middle and high latitudes, but records from equatorial regions are relatively few, especially from regions experiencing the passage of the Intertropical Convergence Zone. A continuous and well-resolved climate-proxy record of hydrological variability during the past 25,000 years from equatorial East Africa is now presented and analysed.

    • Dirk Verschuren
    • Jaap S. Sinninghe Damsté
    • Norbert R. Nowaczyk
    Research
    Nature
    Volume: 462, P: 637-641