title: Molecular cloning and characterization of a peroxiredoxin from Phanerochaete chrysosporium.
abstract: Peroxiredoxins (Prxs) are a ubiquitous family of peroxidases widely distributed among prokaryotes and eukaryotes. Here, we report on the cloning and functional characterization of a cDNA designated PcPrx-1, encoding peroxiredoxin from the white-rot fungus Phanerochaete chrysosporium. The full-length PcPrx-1 cDNA (932 bp) contains an open reading frame of 200 amino acid residues with a molecular mass of 22.1 kDa. The deduced primary structure of PcPrx-1 polypeptide shows a high level of sequence identity to other recently identified 2-cys peroxiredoxins. The recombinant PcPrx-1 protein was expressed as a histidine fusion protein in Escherichia coli and purified with a Ni2+-column. The purified protein was shown to have a protective effect against plasmid DNA cleavage by reactive oxygen species. The PcPrx-1 protein displays the ability to remove H2O2 in a ferrithiocyanate system. The results of this study suggest that PcPrx-1 may play a protective role against oxidative stress in P. chrysosporium.
authors.affiliation: College of Life Sciences, Sichuan University, Sichuan Key Laboratory of Molecular Biology and Biotechnology, Chengdu 610064, P.R. China. jiangquan@blazemail.com
authors.forename: Quan
authors.initials: Q
authors.lastname: Jiang
authors.forename: Yong-Hong
authors.initials: YH
authors.lastname: Yan
authors.forename: Guo-Ku
authors.initials: GK
authors.lastname: Hu
authors.forename: Yi-Zheng
authors.initials: YZ
authors.lastname: Zhang
mesh_terms: D000595:Amino Acid Sequence; D000975:Antioxidants; D001483:Base Sequence; D001681:Biological Assay; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004271:DNA, Fungal; D004926:Escherichia coli; D006861:Hydrogen Peroxide / Q000494:pharmacology; D008969:Molecular Sequence Data; D010084:Oxidation-Reduction; D010544:Peroxidases / Q000737:chemistry / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D054464:Peroxiredoxins; D020075:Phanerochaete / Q000201:enzymology* / Q000235:genetics*; D011994:Recombinant Proteins / Q000378:metabolism; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D000975:Antioxidants; D018076:DNA, Complementary; D004271:DNA, Fungal; D011994:Recombinant Proteins; D006861:Hydrogen Peroxide; D010544:Peroxidases; D054464:Peroxiredoxins