title: Evolution of structure and function of Class I peroxidases.
abstract: The phylogenetics of Class I of the heme peroxidase-catalase superfamily currently representing over 940 known sequences in all available genomes of prokaryotes and eukaryotes has been analysed. The robust reconstructed tree for 193 Class I peroxidases with 6 selected Class II representatives reveals all main trends of molecular evolution. It suggests how the ancestral peroxidase gene might have been transferred from prokaryotic into eukaryotic genomes. Besides well known families of catalase-peroxidases, cytochrome c peroxidases and ascorbate peroxidases, the phylogenetic analysis shows for the first time the presence of two new well separated clades of hybrid-type peroxidases that might represent evolutionary bridges between catalase-peroxidases and cytochrome c peroxidases (type A) as well as between ascorbate peroxidases and Class II peroxidases (type B). Established structure-function relationships are summarized. Presented data give useful hints on the origin and evolution of catalytic promiscuity and specificity and will be a valuable basis for future functional analysis of Class I enzymes as well as for de novo design.
authors.affiliation: Metalloprotein Research Group, Division of Biochemistry, Department of Chemistry, BOKU-University of Natural Resources and Applied Life Sciences, Muthgasse 18, A-1190 Vienna, Austria. marcel.zamocky@boku.ac.at
authors.forename: Marcel
authors.initials: M
authors.lastname: Zámocký
authors.forename: Paul G
authors.initials: PG
authors.lastname: Furtmüller
authors.forename: Christian
authors.initials: C
authors.lastname: Obinger
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D002374:Catalase / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D019143:Evolution, Molecular; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D006418:Heme / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010544:Peroxidases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment
chemical_list: D001426:Bacterial Proteins; D005656:Fungal Proteins; D010940:Plant Proteins; D006418:Heme; D010544:Peroxidases; D002374:Catalase