title: Deciphering of the Dual oxidase (Nox family) gene from kuruma shrimp, Marsupenaeus japonicus: full-length cDNA cloning and characterization.
abstract: In many physiological processes, including the innate immune system, free radicals such as nitric oxide (NO) and reactive oxygen species (ROS) play significant roles. In humans, 2 homologs of Dual oxidases (Duox) generate hydrogen peroxide (H(2)O(2)), which is a type of ROS. Here, we report the identification and characterization of a Duox from kuruma shrimp, Marsupenaeus japonicus. The full-length cDNA sequence of the M. japonicus Dual oxidase (MjDuox) gene contains 4695 bp and was generated using reverse transcriptase-polymerase chain reaction (RT-PCR) and random amplification of cDNA ends (RACE). The open reading frame of MjDuox encodes a protein of 1498 amino acids with an estimated mass of 173 kDa. In a homology analysis using amino acid sequences, MjDuox exhibited 69.3% sequence homology with the Duox of the red flour beetle, Tribolium castaneum. A transcriptional analysis revealed that the MjDuox mRNA is highly expressed in the gills of healthy kuruma shrimp. In the gills, MjDuox expression reached its peak 60 h after injection with WSSV and decreased to its normal level at 72 h. In gene knockdown experiments of free radical-generating enzymes, the survival rates decreased during the early stages of a white spot syndrome virus (WSSV) infection following the knockdown of the NADPH oxidase (MjNox) or MjDuox genes. In the present study, the identification, cloning and gene knockdown of the kuruma shrimp MjDuox are reported. Duoxes have been identified in vertebrates and some insects; however, few reports have investigated Duoxes in crustaceans. This study is the first to identify and clone a Dual oxidase from a crustacean species.
authors.affiliation: Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, Miyazaki, Japan.
authors.forename: Mari
authors.initials: M
authors.lastname: Inada
authors.forename: Keisuke
authors.initials: K
authors.lastname: Kihara
authors.forename: Tomoya
authors.initials: T
authors.lastname: Kono
authors.forename: Raja
authors.initials: R
authors.lastname: Sudhakaran
authors.forename: Tohru
authors.initials: T
authors.lastname: Mekata
authors.forename: Masahiro
authors.initials: M
authors.lastname: Sakai
authors.forename: Terutoyo
authors.initials: T
authors.lastname: Yoshida
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Itami
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D017931:DNA Primers / Q000235:genetics; D018076:DNA, Complementary / Q000235:genetics; D020869:Gene Expression Profiling; D055785:Gene Knockdown Techniques; D005880:Gills / Q000378:metabolism; D007564:Japan; D008969:Molecular Sequence Data; D019255:NADPH Oxidases / Q000235:genetics* / Q000378:metabolism; D016366:Open Reading Frames / Q000235:genetics; D033561:Penaeidae / Q000235:genetics* / Q000821:virology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D017385:Sequence Homology; D013045:Species Specificity; D016019:Survival Analysis; D013997:Time Factors; D046848:White spot syndrome virus 1
chemical_list: D017931:DNA Primers; D018076:DNA, Complementary; D019255:NADPH Oxidases