Mandarin fish p53: Genomic structure, alternatively spliced variant and its mRNA expression after virus challenge

文献类型： 外文期刊

第一作者： Guo, Huizhi

作者： Guo, Huizhi;Su, Jianguo;Guo, Huizhi;Fu, Xiaozhe;Lin, Qiang;Liu, Lihui;Liang, Hongru;Huang, Zhibin;Li, Ningqiu

作者机构：

关键词： Siniperca chuatsi;Genomic organization;Sc-p53I6;Antiviral responses

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）

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收录情况： SCI

摘要： AbstractA number of size variants of the p53 protein have been described in mammal, but little is known about alternative splicing of p53 expression and function in the fish. In our previous study, the immune defense and antiviral responses of p53 had been determined in mandarin fish (Siniperca chuatsi). However, the role of its splicing variants remains unknown. In the present study, the organization of mandarin fish p53 (Sc-p53) genome sequence was determined and a novel splice variant was characterized. The Sc-p53 genomic sequence was composed of 5543 bp, containing 11 exons and 10 introns, which was similar to other species. Then, a 1106 bp full-length cDNA of a novel splice variant p53 from mandarin fish (designed as Sc-p53I6) was cloned and characterized. Quantitative real-time PCR assays revealed that Sc-p53I6 was expressed in all tissues examined, and it was most abundant in the gill, hemocyte and hind kidney. Western blotting analysis revealed that Sc-p53I6 protein was abundant in liver, trunk kidney, hind kidney, stomach and heart. In addition, the regulation of Sc-p53I6 gene expression after virus infection was determined and characterized. The results showed twice rise expression pattern of Sc-p53I6 in CPB cells and spleen of mandarin fish in response to infectious kidney and spleen necrosis virus (ISKNV). However, a different expression pattern, once rise, of Sc-p53I6 in response toSiniperca chuatsirhabdovirus (SCRV) infection was found. The mRNA expression of Sc-p53I6 was significantly up-regulated in CPB at 4?h and spleen of mandarin fish at 12?h post-infection. These results will shed a new light on antiviral response mechanisms of p53 in mandarin fish.Highlights?The genome of mandarin fish p53 was cloned and analyzed.?A novel isoform splice variant of mandarin fish 53 (designed as Sc-p53I6) was cloned and characterized.?The tissue distribution of Sc-p53I6 in mandarin fish was determined by qRT-PCR.?The mRNA expression patterns of Sc-p53I6 were determined in CPB cell line and mandarin fish following virus challenge.]]>

分类号： S9

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