大鲵热应激同源蛋白70基因cDNA克隆及表达分析
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中央级科研院所基本科研业务费(2013JBFZ02)


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    摘要:

    结合同源克隆和RACE技术克隆大鲵热应激同源蛋白70基因(hsc70) cDNA序列全长,通过半定量PCR方法分析其在大鲵肾脏、脑、肺、皮肤、肝脏、肾脏、脾脏、心脏、肌肉和垂体组织的表达特点。结果表明:大鲵hsc70基因cDNA全长为2 284 bp(GenBank登录号为HM998289),其中3′端和5′端非翻译区分别为87 bp(1~87)和253 bp(2 032~2 284),中间序列即编码区长为1 944 bp(88~2 031),编码647个氨基酸(AA);其核苷酸序列与其他物种相似性最高达83.5%,而编码的氨基酸序列则相对保守,与钝口螈的相似性达94%;根据其编码的AA序列构建进化树,结果大鲵hsc70首先与两栖类物种聚为一类,不同来源的hsc70基因与分类地位相似的物种分别聚类;半定量PCR结果表明,hsc70基因在大鲵的10种组织中都以较高的水平表达,但存在组织差异,在肾脏、脑、肺、皮肤、肝脏、胃、脾脏中表达量相对较高,在心脏中表达量次之,在肌肉和垂体中表达较低。

    Abstract:

    Combined the homology-based cloning and rapid-amplification of cDNA ends (RACE) method, the complete cDNA sequence of the heat shock cognate 70 gene was obtained. The semi-quantitative RT–PCR was used to detect the gene expression in 10 tissues of Chinese giant salamander. The results showed that the full-length cDNA of heat shock cognate 70 gene was 2 284 bp(GenBank accession number HM998289), which contained 87 bp 3′–untranslated region and 253 bp 5′–untranslated region. The open reading frame (ORF), encoded 647 amino acids was 1 944 bp in length. The sequence similarity of nucleocides is 83.5% with other species, but the amino acid is conserved relatively, which showed similarity of 94% with Ambystoma mexicatnum. The phylogeny genetic analysis was constructed based on the amino acid of heat shock cognate 70 gene. The results showed the hsc70 gene of Chinese giant salamander clustered with other amphibians firstly. And it indicated the gene evolution is corresponding with their status of the species origin. According to the analysis of semi-quantitative RT–PCR, although high expression of this gene could detect in 10 tissues, there is different expression quantity among them. The expression in kidney, brain, lung, skin, liver, stomach and spleen is relatively high, followed by heart, and the expression in muscle and pituitarium was low.

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孟彦,肖汉兵,田海峰,胡乔木.大鲵热应激同源蛋白70基因cDNA克隆及表达分析[J].湖南农业大学学报:自然科学版,2014,40(5):.

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  • 最后修改日期:2014-10-01
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  • 在线发布日期: 2014-10-30
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