| 中国林蛙Onconase样核糖核酸酶的基因克隆和表达 |
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| 引用本文： | 徐宏博,王天航,董安康,陶凤云,赵伟.中国林蛙Onconase样核糖核酸酶的基因克隆和表达[J].生物技术通报,2011(10). |
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| 作者姓名： | 徐宏博 王天航 董安康 陶凤云 赵伟 |
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| 作者单位： | 北京联合大学生物化学工程学院,北京,100023 |
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| 基金项目： | 北京市教育委员会科技发展计划面上项目(KM200411417014) |
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| 摘 要： | Onconase是从美洲豹蛙卵中提取的一种核糖核酸酶,由于其抗肿瘤活性而具有潜在的临床应用价值.以中国林蛙基因组为模板,克隆了一个新的RNase基因,并由此推导出了成熟林蛙RNase的氨基酸顺序.该酶是由103个氨基酸残基组成的,它保留了RNaseA家族成员酶催化活性必须的组氨酸和赖氨酸残基,以及CKXXNTF的序列特征,与Onconase具有73％的氨基酸顺序的相似性.林蛙酶比Onconue少一个氨基酸,成为选今为止发现的RNaseA家族中的最小成员；并且,林蛙酶拥有的精氨酸和酪氨酸残基比Onconase多3个.此外,在利用原核表达系统对林蛙RNase基因进行表达的过程中,表达产物对宿主显示出一定的细胞毒性.
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| 关 键 词： | 中国林蛙 核糖核酸酶 基因克隆和表达 |
The Cloning and Expression of RNase from Rana dybowskii |
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| Xu Hongbo,Wang Tianhang,Dong Ankang,Tao Fengyun,Zhao Wei.The Cloning and Expression of RNase from Rana dybowskii[J].Biotechnology Bulletin,2011(10). |
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| Authors: | Xu Hongbo Wang Tianhang Dong Ankang Tao Fengyun Zhao Wei |
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| Institution: | Xu Hongbo Wang Tianhang Dong Ankang Tao Fengyun Zhao Wei(Biochemical Engineering College of Beijing Union University,Beijing 100023) |
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| Abstract: | Onconase,a member of ribonuclease A superfamily,was isolated from oocytes of Rana pipiens,which showed perspective of application in clinic due to its antitumor activity.In this study,a novel ribonuclease gene from the genomic DNA of Rana dybowskii was isolated.The sequence analysis demonstrated that it consists of 103 amino acid residues in mature enzyme,and shows 73% amino acid identity to Onconase,but one less amino acid residue than Onconase,which makes it the smallest member found in the superfamily.Th... |
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| Keywords: | Rana dybowskii Ribonuclease Gene clone and expression |
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