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Position: Home > Articles > Cloning and Expression of Ferritin Gene in Bluntnose Black Bream Megalobrama amblycephala Chinese Journal of Fisheries 2015 (3) 1-8

团头鲂铁蛋白基因的克隆及其在嗜水气单胞菌感染下的表达

作  者:
孙盛明;戈贤平;朱健;张成锋;缪凌鸿
单  位:
中国水产科学研究院淡水渔业研究中心
关键词:
团头鲂;铁蛋白;基因表达;嗜水气单胞菌
摘  要:
利用cDNA末端快速扩增法(RACE)克隆团头鲂Megalobrama amblycephala铁蛋白基因c DNA全长序列;同时研究经嗜水气单胞菌Aeromonas hydrophila攻毒后团头鲂肝组织中铁蛋白表达的变化,了解铁蛋白基因在团头鲂免疫应答中的作用。结果表明:团头鲂铁蛋白c DNA全长序列包括150bp的5’末端序列(untranslated region,UTR),270bp的3’UTR,以及522bp编码174个氨基酸的开放阅读框(open reading frame,ORF)。这些氨基酸序列同其他鱼类铁蛋白M链氨基酸序列同源性较高。团头鲂铁蛋白基因在5’非编码区核甘酸序列124~154的位置有个特殊的结构,即铁反应元件(iron response element,IRE)。荧光定量PCR分析表明:铁蛋白基因在团头鲂肌肉、心脏、鳃、肝胰脏、脑和肾脏等组织器官中都有表达,在肝胰脏的表达量最高,脑组织表达量最低。经嗜水气单胞菌急性感染后,团头鲂肝胰脏组织中铁蛋白基因表达量显著上调。上述结果表明:团头鲂铁蛋白M亚基在团头鲂免疫应答过程中起重要作用。
译  名:
Cloning and Expression of Ferritin Gene in Bluntnose Black Bream Megalobrama amblycephala
作  者:
SUN Sheng-ming;GE Xian-ping;ZHU Jian;ZHANG Cheng-feng;Miao Ling-hong;Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences;
关键词:
Megalobrama amblycephala;;ferritin;;gene expression;;Aeromonas hydrophila
摘  要:
A ferritin middle-chain(M)subunit, Ma Fer M, was cloned from blunt snout bream Megalobrama amblycephala by rapid amplification of DNA ends(RACE). It was found that the full-length c DNA of Ma Fer M was 942 bp consisting of a 5'-untranslated region(UTR)of 150 bp, an open reading frame(ORF)of 522 bp and a 3'-UTR of 270 bp. The ORF encoded a putative protein of 174 amino acids, which shared extensive sequence identities with the M ferritins of several fish species. The putative iron-response elements(IREs)were observe at the nucleotide sequence of 124~154 position in the 5'-UTR of ferritin. Fluorescence quantitative real-time reverse transcription polymerase chain reaction analysis indicated that the maximal Ma Fer M expression was found in the hepatopancreas and the minimal in the brain and responded positively to experimental challenges with Aeromonas hydrophila. The findings indicate that Ma Fer M is a functional M ferritin and is likely to play a role in protection against microbial infection.

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