| 摘要: |
| 目的:克隆人胚生殖系细胞多能性调节基因Oct4,并使其在大肠杆菌中表达.方法:取4～6周人胚胎分离生殖嵴和背侧肠系膜,利用RT-PCR技术扩增编码Oct4的全长cDNA,并插入到原核表达载体pGEX5T中,构建成 pGEX5T-Oct4重组质粒.β硫代半乳糖苷(IPTG)诱导使该基因在k802菌中表达.结果:用PCR方法扩增获得大小约1.1 kb条带;全自动测序与GenBank中登录的序列97％同源.获得了pGEX5T-Oct4 重组子并在k802菌中获得了表达,SDS-PAGE分析有一特异性的62 000条带.结论:扩增和克隆了人胚生殖系细胞多能性调节蛋白Oct4 全长cDNA并在大肠杆菌中获得表达,为进一步研究人胚生殖系细胞多能性调节与分化奠定了基础. |
| 关键词: 生殖嵴干细胞、Oct4、基因克隆、基因表达 |
| DOI： |
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| Cloning of human embryonic germ cell pluripotency regulation gene Oct4 and its expression in E.coli |
| 刘善荣,王庆敏,杨玲,汤淑萍,惠宁,蒋正,戚中田,刘厚奇 |
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| Abstract: |
| Objective: To clone the gene encoding Oct4 protein regulating human embryonic germ cell pluripotency and to express it in E.coli(k802). Methods: Total RNA was extracted from gonadal ridges and mesenteries of 4- to 6-week-old human embryos and cDNA amplification was performed by Reverse Transcription-Polymerase Chain Reaction (RT-PCR). The full-length Oct4 cDNA was cloned into prokaryotic expressing vector-pGEX5T and the product was sequenced. PGEXT-oct4 was then expressed in k802 E.coli. Results: One specific band of 1.1 kb was obtained and had 97％ affinity to that reported in GenBank. The protein was successfully expressed,exhibiting a 62 000 band by SDS-PAGE analysis. Conclusion: The full-length Oct4 cDNA has been amplified and cloned,and Oct4 protein is expressed successfully in k802 E.coli. This may be helpful in future studies on pluripotency and differentiation of human embryonic germ cells. |
| Key words: embryonic germ cell Oct4 gene clone gene expression |
