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Showing 1–7 of 7 results
Advanced filters: Author: Patrick E. Konold Clear advanced filters

  • Photosystem II subunit S (PsbS) senses thylakoid lumen acidification when plants are exposed to excess light. Here the authors use NMR and IR spectroscopy to show that low pH causes repositioning of an amphipathic helix and folding of a loop involving critical pH sensing glutamate residues in PsbS.

    • Maithili Krishnan-Schmieden
    • Patrick E. Konold
    • Anjali Pandit
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-11

  • 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

  • Rhizoclosmatium globosum contains three rhodopsin-guanylyl cyclases (RGCs) predicted to enable visual orientation of zoospores. Here authors show that RGC1 and 2 function as light-activated cyclases only upon heterodimerization with RGC3 (NeoR), a near-infrared absorbing, highly fluorescent rhodopsin.

    • Matthias Broser
    • Anika Spreen
    • Peter Hegemann
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-10

  • The authors present an in-depth investigation of excited state dynamics and molecular mechanism of the voltage sensing in microbial rhodopsins. Using a combination of spectroscopic investigations and molecular dynamics simulations, the study proposes the voltage-modulated deprotonation of the chromophore as the key event in the voltage sensing. Thus, molecular constraints that may further improve the fluorescence quantum yield and the voltage sensitivity are presented.

    • Arita Silapetere
    • Songhwan Hwang
    • Peter Hegemann
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-20