title: The JAK and STAT family members of the mandarin fish Siniperca chuatsi: molecular cloning, tissues distribution and immunobiological activity.
abstract: The JAK/STAT signal transduction pathway plays a critical role in host defence against viral and bacterial infections. In the present study, we report cDNA cloning and characterization of the JAK family (mJAK1-3 and mTYK2) and STAT family members (mSTAT1, mSTAT3-6) from the mandarin fish Siniperca chuatsi. To our knowledge, JAK2, TYK2 and STAT6 genes were cloned from fish for the first time. The mJAK family proteins consist of 1112-1177 residues with a FERM domain, an SH2 domain, a pseudokinase domain, and a tyrosine kinase domain. The mSTAT family members contain 716-786 residues with similar architecture, including an N-terminal domain, a coiled coil domain, a DNA binding domain, a linker domain, an SH2 domain, and a transcription activation domain. Multiple sequence alignments of mJAKs/mSTATs and phylogenetic analysis showed that mJAK1 was closed to mTYK2, and mJAK2 was closed to mJAK3. Quantitative real-time PCR results revealed that mJAK/mSTAT family members were expressed in most tissues examined except muscle. In mandarin fish fry cells, the expressions of IRF-1, Mx, SOCS1 and SOCS3 genes were significantly induced by poly(I:C) stimulation, indicating that the mJAK/mSTAT signal pathway is activated by poly(I:C). Furthermore, expressions of all four mJAKs and four mSTATs were all up-regulated after poly(I:C) stimulation, but expression of mSTAT5 was inhibited by poly(I:C). These results suggest that mandarin fish has the JAK/STAT signal transduction pathways similar to those in mammals, and these signalling pathways may play an important role in regulation of antiviral responses in fish.
authors.affiliation: State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-sen University, 135 Xingang Road West, Guangzhou 510275, PR China.
authors.forename: Chang-Jun
authors.initials: CJ
authors.lastname: Guo
authors.forename: Ying-Fen
authors.initials: YF
authors.lastname: Zhang
authors.forename: Li-Shi
authors.initials: LS
authors.lastname: Yang
authors.forename: Xiao-Bo
authors.initials: XB
authors.lastname: Yang
authors.forename: Yan-Yan
authors.initials: YY
authors.lastname: Wu
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.forename: Wei-Jian
authors.initials: WJ
authors.lastname: Chen
authors.forename: Shao-Ping
authors.initials: SP
authors.lastname: Weng
authors.forename: Xiao-Qiang
authors.initials: XQ
authors.lastname: Yu
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: He
mesh_terms: D000276:Adjuvants, Immunologic / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D003001:Cloning, Molecular; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000187:drug effects; D053614:Janus Kinase 2 / Q000235:genetics / Q000276:immunology; D053612:Janus Kinases / Q000737:chemistry / Q000235:genetics* / Q000276:immunology*; D008969:Molecular Sequence Data; D010473:Perciformes / Q000235:genetics* / Q000276:immunology*; D010802:Phylogeny; D011070:Poly I-C / Q000494:pharmacology; D050791:STAT Transcription Factors / Q000737:chemistry / Q000235:genetics* / Q000276:immunology*; D050800:STAT6 Transcription Factor / Q000235:genetics / Q000276:immunology; D016415:Sequence Alignment; D015398:Signal Transduction / Q000187:drug effects; D053634:TYK2 Kinase / Q000235:genetics / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D050791:STAT Transcription Factors; D050800:STAT6 Transcription Factor; D053614:Janus Kinase 2; D053612:Janus Kinases; D053634:TYK2 Kinase; D011070:Poly I-C