title: Cloning and expression of a novel serine protease from Japanese flounder, Paralichthys olivaceus.
abstract: Two different cDNA clones of Japanese flounder (types I-1 and I-2) with lengths of 1096 and 1572bp, respectively, were found to encode the same serine protease consisting of 244 identical amino acid residues with three putative N-glycosylation sites, an 18-amino acid signal peptide and a 2-amino acid activation peptide. The amino acid sequence of the Japanese flounder serine protease shares 39-44% identity to known hematopoietic serine proteases. Genomic analysis showed that two different clones were alternatively spliced from the same gene. A phylogenetic tree analysis showed that the Japanese flounder serine protease clustered with a hypothetical fugu protein and this cluster belonged to the neutrophil serine protease family cluster, which includes myeloblastin, N-elastase, and azurocidin. Expression of the Japanese flounder serine protease gene was observed to be up-regulated in head kidney cells after infection with Hirame rhabdovirus and LPS induction. In situ hybridization indicated that cells expressing Japanese flounder serine protease are different from CD8(+) and immunoglobulin(+) cells.
authors.affiliation: Laboratory of Genome Science, Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, Konan 4-5-7, Minato, Tokyo 108-8477, Japan.
authors.forename: Jee Youn
authors.initials: JY
authors.lastname: Hwang
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; D001483:Base Sequence; D003001:Cloning, Molecular; D005432:Flounder / Q000502:physiology*; D006801:Humans; D017403:In Situ Hybridization; D008969:Molecular Sequence Data; D010802:Phylogeny; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D012697:Serine Endopeptidases / Q000235:genetics* / Q000378:metabolism*
chemical_list: D012333:RNA, Messenger; D012697:Serine Endopeptidases