Probing the dioxygen route in Melanocarpus albomyces laccase with pressurized xenon gas

J. P. Kallio, J. Rouvinen, Kristiina Kruus, N. Hakulinen (Corresponding Author)

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    Laccases catalyze the oxidation of phenolic substrates and the concominant reduction of dioxygen to water. We used xenon as an oxygen probe in search of routes for the entry of dioxygen into the catalytic center. Two xenon-pressurized crystal structures of recombinant Melanocarpus albomyces laccase were determined, showing three hydrophobic Xe-binding sites located in domain C. The analysis of hydrophobic cavities in other laccase structures further suggested the preference of domain C for binding of hydrophobic species such as dioxygen, thus suggesting that the hydrophobic core of domain C could function as a channel through which dioxygen can enter the trinuclear copper center.
    Original languageEnglish
    Pages (from-to)4396-4398
    Number of pages3
    JournalBiochemistry
    Volume50
    Issue number21
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed

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