Revisiting the Non-Animal Peroxidase Superfamily.

Peroxidases reduce peroxide through substrate oxidation in order to alleviate oxidative stress in aerobic organisms. Since the initial description of the non-animal peroxidase superfamily, great effort has been made to characterize this large and heterogeneous group of proteins. Next generation sequencing data have permitted an in-depth study of the molecular evolution of this superfamily and allowed us to perform a phylogenetic reconstruction. Through this analysis, we identified two additional class I members and, here, we discuss the similarities and differences among members of this class. Our results provide new insights into the organization of these antioxidant enzymes, allowing us to propose a new model for the emergence and evolution of this superfamily.

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