title: Cloning and characterization of type II interleukin-1 receptor cDNA from Japanese flounder (Paralichthys olivaceus).
abstract: The type II interleukin-1 receptor (IL-1RII) cDNA was cloned from Japanese flounder (Paralichthys olivaceus) by mRNA differential display (DD-PCR) and rapid amplification of cDNA ends (RACE). The full-length cDNA is 1793 bp in length, including a 100 bp 5'-terminal untranslated region (UTR), a 430 bp 3'-terminal UTR, and a 1263 bp open reading frame (ORF). The ORF encodes 420 amino acid residues with an estimated molecular mass of 46.65 kDa. The protein possesses signature features of the IL-R family, consisting of one N-terminal signal peptide, one transmembrane (TM) domain, two Ig-like domains in its extracellular region, one short cytoplasmic tail of 17 amino acids and four conserved proline residue sites. The predicted amino acid sequence has 65.3%, 52.5% and 51.6% identity with gilthead seabream, rainbow trout and Atlantic salmon IL-1RII, respectively. Phylogenetic analysis supported a close relation to mammalian IL-1RII. Reverse Transcription Polymerase Chain Reaction (RT-PCR) analysis indicated that the IL-1RII gene expression of Japanese flounder was weakly up-regulated and reached the peak expression in the kidney, spleen, and gill at 6 h after infection with Vibrio anguillarum, at 1.9, 2.0 and 1.5 times relative to the uninfected fish, respectively. These results suggest that IL-1RII has a signal transduction function and possibly plays a minor role in immune regulation against bacterial(s) infection in Japanese flounder.
authors.affiliation: Key Laboratory of Marine Genetics and Breeding (College of Marine Life Science, Ocean University of China) Ministry of Education, 5 Yushan Road, Qingdao 266003, PR China.
authors.forename: Yuding
authors.initials: Y
authors.lastname: Fan
authors.forename: Shuo
authors.initials: S
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Qi
authors.forename: Lingbing
authors.initials: L
authors.lastname: Zeng
authors.forename: Qiwang
authors.initials: Q
authors.lastname: Zhong
authors.forename: Quanqi
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics*; D005432:Flounder / Q000235:genetics* / Q000276:immunology; D005786:Gene Expression Regulation; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D010802:Phylogeny; D053574:Receptors, Interleukin-1 Type II / Q000737:chemistry / Q000145:classification / Q000235:genetics* / Q000276:immunology; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D018076:DNA, Complementary; D053574:Receptors, Interleukin-1 Type II