title: A peroxiredoxin from kuruma shrimp, Marsupenaeus japonicus, inhibited by peptidoglycan.
abstract: Crustaceans rely on both the cellular and humoral responses of their innate immune system for protection against invading pathogens. Peroxiredoxins (Prx) are a family of anti-oxidant proteins that protect aerobic organisms against oxidative damage by reactive oxygen species (ROS). Although it is ubiquitously found in all organisms, it has not been studied thoroughly in crustaceans. Here, we report a Prx from the crustacean kuruma shrimp, Marsupenaeus japonicus (mjPrx). This crustacean Prx has a full-length cDNA of 659 bp encoding for 198 putative amino acids. It has no signal peptide and is composed of 4 cysteine residues. Based on the conservation of these residues, particularly the N- and C-terminal cysteines, conserved protein domains and on phylogenetic analysis, mjPrx was found to belong to the 2-Cys Prx subgroup. The mjPrx gene is constitutively expressed in heart, hemocyte and lymphoid tissues, and is down-regulated in heart and lymphoid tissues by peptidoglycan (PG) treatment.
authors.affiliation: Laboratory of Genome Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Minato, Tokyo 108-8477, Japan.
authors.forename: Mary Beth
authors.initials: MB
authors.lastname: Bacano Maningas
authors.forename: Takashi
authors.initials: T
authors.lastname: Koyama
authors.forename: Hidehiro
authors.initials: H
authors.lastname: Kondo
authors.forename: Ikuo
authors.initials: I
authors.lastname: Hirono
authors.forename: Takashi
authors.initials: T
authors.lastname: Aoki
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics; D015870:Gene Expression / Q000187:drug effects; D006321:Heart / Q000187:drug effects; D006434:Hemocytes / Q000187:drug effects / Q000378:metabolism; D008221:Lymphoid Tissue / Q000187:drug effects / Q000378:metabolism; D008969:Molecular Sequence Data; D009206:Myocardium / Q000378:metabolism; D033561:Penaeidae / Q000145:classification / Q000235:genetics*; D010457:Peptidoglycan / Q000494:pharmacology*; D054464:Peroxiredoxins / Q000235:genetics*; D010802:Phylogeny; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D018076:DNA, Complementary; D010457:Peptidoglycan; D054464:Peroxiredoxins