Advanced search

Filter By:

Journal Check one or more journals to show results from those journals only.

Choose more journals

Article type Check one or more article types to show results from those article types only.
Subject Check one or more subjects to show results from those subjects only.
Date Choose a date option to show results from those dates only.

Custom date range

Clear all filters
Sort by:
Showing 1–6 of 6 results
Advanced filters: Author: Ivo H M van Stokkum Clear advanced filters

  • The chlorophyll biosynthetic enzyme NADPH:protochlorophyllide oxidoreductase, which catalyses a light-driven reaction involving hydride and proton transfers is examined. It is determined that prior excitation of the enzyme–substrate complex with a laser pulse induces a more favourable conformation of the active site and increases the catalytic efficiency of the coupled hydride and proton transfer reactions. Spectral changes in the mid-infrared after the absorption of one photon reveal significant conformational changes in the enzyme.

    • Olga A. Sytina
    • Derren J. Heyes
    • Marie Louise Groot
    Research
    Nature
    Volume: 456, P: 1001-1004

  • LHCII, the main light-harvesting complex in photosynthesis, has an inbuilt capability to undergo transformation into a dissipative state by conformational change, but it was not known if such events occur in vivo or how energy is dissipated in this state. The transition into the dissipative state is associated with a twist in the configuration of the LHCII-bound carotenoid neoxanthin identified using resonance Raman spectroscopy. Applying this technique to study isolated chloroplasts and whole leaves, this paper shows that the same change in neoxanthin configuration occurs in vivo, to an extent consistent with the magnitude of energy dissipation.

    • Alexander V. Ruban
    • Rudi Berera
    • Rienk van Grondelle
    Research
    Nature
    Volume: 450, P: 575-578

  • Protein structural dynamics can be studied by time-resolved crystallography (TRC) and ultrafast transient spectroscopic methods. Here, the authors perform electronic and vibrational transient absorption measurements to characterise the full photocycle of Photoactive Yellow Protein (PYP) both in the crystalline and solution state and find that the photocycle kinetics and structural intermediates of PYP deviate in the crystalline state, which must be taken into consideration when planning TRC experiments.

    • Patrick E. Konold
    • Enis Arik
    • Marie Louise Groot
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-12

  • Carotenoids can dissipate excess energy captured by photosynthetic light-harvesting complexes to prevent photodamage. Here, via spectroscopic and in silico approaches, Liguori et al. resolve different carotenoid dark states and propose conformational changes that permit them to act as either energy donors or quenchers.

    • Nicoletta Liguori
    • Pengqi Xu
    • Roberta Croce
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9