遗传 ›› 2006, Vol. 28 ›› Issue (12): 1532-1532~1540.doi: 10.1360/yc-006-1532

• 研究报告 • 上一篇    下一篇

Tenebrio molitor抗冻蛋白基因家族cDNA片段的克隆、序列分析及原核表达

刘忠渊, 王 芸, 吕国栋, 王贤磊, 张富春, 马 纪   

  1. (新疆大学生命科学与技术学院分子生物学重点实验室, 新疆生物资源基因工程重点实验室, 乌鲁木齐 830046)

  • 收稿日期:2006-04-25 修回日期:2006-07-31 出版日期:2006-12-10 发布日期:2006-12-10
  • 通讯作者: 马 纪

Cloning, Sequencing and Prokaryotic Expression of cDNAs for the Antifreeze Protein Family from the Beetle Tenebrio molitor

LIU Zhong-Yuan, WANG Yun, LÜ Guo-Dong, WANG Xian-Lei, ZHANG Fu-Chun, MA Ji

  

  1. (Key Laboratory of Molecular Biology, College of Life Science and Technology, Xinjiang University Xinjiang Key Laboratory
    of Biological Resources and Genetic Engineering, Urumqi
    830046, China)
  • Received:2006-04-25 Revised:2006-07-31 Online:2006-12-10 Published:2006-12-10
  • Contact: MA Ji

摘要:

利用反转录-多聚酶链式反应(RT-PCR)的方法, 克隆黄粉甲虫(Tenebrio molitor)抗冻蛋白基因cDNA片段并进行序列分析和原核表达。同源性分析表明, 获得9条新cDNA片段, 与黄粉甲虫抗冻蛋白基因家族的其他基因序列具有较高的同源性。重组质粒pGEX-4T-1-tmafp-XJ430, 转化E.coli BL21进行原核表达, SDS-PAGE分析结果表明, 抗冻蛋白基因以可溶性融合蛋白表达, 相对分子量为38 kDa。构建真核表达载体pCDNA3-tmafp-XJ430, 免疫小鼠, 获得的抗血清滴度为1:2 000。Western blotting 结果为单一的条带, 证明该抗血清具有针对抗冻蛋白TmAFP-XJ430抗原的专一性。

关键词: 原核表达, 抗冻蛋白, 黄粉甲虫, 序列分析, cDNA片段

Abstract:

The partial cDNA sequence coding for the antifreeze proteins in the Tenebrio molitor was obtained by RT-PCR. Sequence analysis revealed nine putative cDNAs with a high degree of homology to Tenebrio molitor antifreeze proteins. The recombinant pGEX-4T-1-tmafp-XJ430 was introduced into E. coli BL21 to induce a GST fusion protein by IPTG. SDS-PAGE of the fusion protein demonstrated that the antifreeze protein migrated at a size of 38 kDa. The immunization was performed by intra-muscular injection of pCDNA3- tmafp-XJ430, and then antiserum was detected by ELISA.The titer of the antibody was 1:2 000. Western blotting analysis showed the antiserum was specific against the antifreeze protein. This finding could lead to further investigation of the properties and function of antifreeze proteins.

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