基础医学与临床 ›› 2012, Vol. 32 ›› Issue (1): 56-60.

• 研究论文 • 上一篇    下一篇

引入易错PCR和DNA-shuffling技术构建单链抗体库

杨浩1,杨青平2,2,查成喜2,2,韩跃武1   

  1. 1. 兰州大学
    2.
  • 收稿日期:2011-01-07 修回日期:2011-08-22 出版日期:2012-01-05 发布日期:2011-12-28
  • 通讯作者: 韩跃武 E-mail:hanyuewu730000@163.com

The introduction of error-prone PCR and DNA-shuffling technology to build single-chain antibody library

  • Received:2011-01-07 Revised:2011-08-22 Online:2012-01-05 Published:2011-12-28
  • Contact: HAN yuewu E-mail:hanyuewu730000@163.com

摘要: 摘要:目的 引入易错PCR和DNA -shuffling技术构建库容量高的单链抗体库,为后续筛选得到高亲和力抗体奠定基础。方法 收集不同年龄组、不同性别、不同健康状态的人的静脉血各5ml提取单个核细胞总RNA,反转录,PCR扩增VH和VL基因,应用易错PCR对VH和VL基因进行突变,同时用DNA-shuffling技术对全长单链抗体进行体外改组,获得的分子与T载体连接转化E.coli DH5α后,采用菌落PCR鉴定重组率,酶切鉴定抗体库多样性。结果 引入易错PCR和DNA-shuffling技术后,成功构建了单链抗体库,经酶切鉴定,初步判断抗体库多样性良好、库容量高。结论 构建单链抗体库的过程中,引入易错PCR和DNA-shuffling技术,有利于提高基因的多样性,利于构建高库容量的单链抗体库。

关键词: 关键词:易错PCR, DNA-shuffling, 单链抗体库

Abstract: Abstract:Objective The high-storage capacity single-chain antibody (ScFv) library was constructed for selecting high-affinity antibodies using error-prone PCR and DNA-shuffling. Methods Collected 5ml blood from different age groups, gender and healthy people, mononuclear cells RNA were extracted, reverse transcription. VH and VL genes were amplified by PCR, and then VH and VL gene mutation amplified error-prone PCR. The full-length ScFv fragments were recombinated with the DNA-shuffling technology in vitro, and then transfer E.coli DH5α. The recombination rate was identified by colony PCR, antibody library diversity identified by restriction enzyme digestion. Results The single-chain antibody library was constructed by error-prone PCR and DNA-shuffling techniques. Analyzed by restriction enzyme digestion, the diversity of antibody library was good, the capacity was high storage. Conclusion The introduction of error-prone PCR and DNA-shuffling technology can help improve the genetic diversity, which will help build high-storage capacity of the single chain antibody library.

Key words: Keywords:Error-prone PCR, DNA-shuffling, ScFv library

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