title: Molecular characterization and expression pattern of tumor suppressor protein p53 in mandarin fish, Siniperca chuatsi following virus challenge.
abstract: In recent years, the tumor suppressor protein p53, which is crucial for cellular defense against tumor development, has also been implicated in host antiviral defense. In the present study, a 1555 bp full-length cDNA of p53 from mandarin fish (Siniperca chuatsi) (Sc-p53) was cloned and characterized. Quantitative real-time PCR assays revealed that Sc-p53 was expressed in all tissues examined, and it was most abundant in the gill and kidney. Recombinant Sc-p53 fused with a His·Tag was expressed in Escherichia coli BL21 (DE3) cells and a rabbit polyclonal antibody was raised against recombinant Sc-p53. In addition, the regulation of Sc-p53 gene expression after experimental viral infection was determined and characterized. The mRNA and protein expression of Sc-p53 were significantly up-regulated in the Chinese perch brain (CPB) cell line and mandarin fish after infection with infectious kidney and spleen necrosis virus (ISKNV). The results showed a biphasic expression pattern of Sc-p53 protein in CPB. However, a different expression pattern of Sc-p53 in response to S. chuatsi rhabdovirus (SCRV) infection was found. The mRNA expression of Sc-p53 was significantly up-regulated in CPB at 6 h and spleen of mandarin fish at 24 h post-infection. The protein expression of Sc-p53 was significantly up-regulated in CPB at 1 h, remained elevated at 4 h, and then decreased to control level at 8 h post-infection by SCRV. All of these data suggested that Sc-p53 plays a critical role in immune defense and antiviral responses.
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
authors.forename: Huizhi
authors.initials: H
authors.lastname: Guo
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
authors.forename: Xiaozhe
authors.initials: X
authors.lastname: Fu
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China. Electronic address: nqli@prfri.ac.cn.
authors.forename: Ningqiu
authors.initials: N
authors.lastname: Li
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Lin
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Liu
authors.affiliation: Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Provinces, Guangzhou 510380, China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, Wuhan 430070, China.
authors.forename: Shuqin
authors.initials: S
authors.lastname: Wu
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D003001:Cloning, Molecular; D004266:DNA Virus Infections / Q000235:genetics* / Q000662:veterinary; D005393:Fish Diseases / Q000235:genetics*; D029941:Fish Proteins / Q000235:genetics*; D005399:Fishes / Q000235:genetics*; D007497:Iridoviridae; D012333:RNA, Messenger / Q000378:metabolism; D012209:Rhabdoviridae; D018353:Rhabdoviridae Infections / Q000235:genetics* / Q000662:veterinary; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D029941:Fish Proteins; D012333:RNA, Messenger; D016159:Tumor Suppressor Protein p53
keywords: Antiviral responses; ISKNV; SCRV; Siniperca chuatsi; p53