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  • The Dermacozines and Light:...
    Juhasz, Bertalan; Cuesta, Angel; Howe, R. F.; Jaspars, Marcel

    Organic & biomolecular chemistry, 2024
    Journal Article

    Dermacozines, the secondary metabolites of the Mariana Trench sediment bacterium, Dermacoccus abyssi MT1.1T were studied using Cyclic Voltammetry (CV), Electron Paramagnetic Resonance (EPR), furthermore literature and own experimental UV-Vis spectroscopic data. With those measurements, we determined experimentally the positions of the HOMO, which shifts towards to more positive potentials, and the constant LUMO in the Standard Hydrogen Electrode scale, whilst the HOMO-LUMO gap is getting deeper, respectively. The HOMO energies of dermacozines experimentally were proven to be water oxidising. EPR spectroscopy demonstrated the formation of semiquinone radicals in the case of dermacozines E, O upon irradiation with visible light corresponding to the absorption maxima (AM) of the chromophores. Our findings suggest, that the dermacozines may assist the strain by maintaining redox homeostasis through its respiratory chain.