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Issue 1, 2014
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Molybdenum and tungsten oxygen transferases – structural and functional diversity within a common active site motif

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Abstract

Molybdenum and tungsten are the only second and third-row transition elements with a known function in living organisms. The molybdenum and tungsten enzymes show common structural features, with the metal being bound by a pyranopterin-dithiolene cofactor called molybdopterin. They catalyze a variety of oxygen transferase reactions coupled with two-electron redox chemistry in which the metal cycles between the +6 and +4 oxidation states usually with water, either product or substrate, providing the oxygen. The functional roles filled by the molybdenum and tungsten enzymes are diverse; for example, they play essential roles in microbial respiration, in the uptake of nitrogen in green plants, and in human health. Together, the enzymes form a superfamily which is among the most prevalent known, being found in all kingdoms of life. This review discusses what is known of the active site structures and the mechanisms, together with some recent insights into the evolution of these important enzyme systems.

Graphical abstract: Molybdenum and tungsten oxygen transferases – structural and functional diversity within a common active site motif

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Publication details

The article was received on 19 Jun 2013, accepted on 10 Sep 2013 and first published on 10 Sep 2013


Article type: Critical Review
DOI: 10.1039/C3MT00177F
Metallomics, 2014,6, 15-24

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    Molybdenum and tungsten oxygen transferases – structural and functional diversity within a common active site motif

    M. J. Pushie, J. J. Cotelesage and G. N. George, Metallomics, 2014, 6, 15
    DOI: 10.1039/C3MT00177F

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