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 journalArticleScientificpeer-review

13 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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