, Volume 56, Issue 4, pp 435-445

Evolution of Bacterial and Archaeal Multicomponent Monooxygenases

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Abstract

We report the results of a comparative analysis of the sequences of multicomponent monooxygenases, a family of enzymes of great interest for bioremediation of contaminated soil. We show that their function, in terms of substrate specificity, can be deduced from their subunit organization and composition, that rearrangements of subunits as well as recruitments of new ones can be used to explain their different properties and functionalities, and that the observed pattern can be rationalized invoking a number of evolutionary events, including horizontal gene transfer. Our analysis highlights the plasticity and modularity of this family of enzymes, which might very well be the reason underlying the extremely rapid emergence of new bacterial strains able to grow on contaminated soils.