›› 2009, Vol. 36 ›› Issue (6): 69-72.

• 遗传繁育 • 上一篇    下一篇

绵羊生殖道抗菌肽cDNA克隆及真核表达载体构建

库朝锋1,2,王新华2,薄新文2,张慧1,2,吕廷德1,2,李娜1,2   

  1. (1.石河子大学动物科技学院, 石河子 832003; 2.新疆兵团绵羊繁育生物技术重点实验室, 石河子 832000)
  • 收稿日期:2008-12-19 修回日期:1900-01-01 出版日期:2009-06-20 发布日期:2009-06-20
  • 通讯作者: 薄新文

cDNA Clone of Antimicrobial Peptide from the Reproductive Tract of Ovis aries and Construction of its Eukaryotic Expression Vector

KU Chao-feng1,2,WANG Xin-hua2,BO Xin-wen2,ZHANG Hui1,2,LV Ting-de1,2, LI Na1,2   

  1. (1.College of Animal Science & Technology, Shihezi University, Shihezi 832003, China; 2.The Breed and Biotechnology Key Laboratory of Sheep in Xinjiang Bingtuan, Shihezi 832000, China)
  • Received:2008-12-19 Revised:1900-01-01 Online:2009-06-20 Published:2009-06-20
  • Contact: BO Xin-wen

摘要: 绵羊生殖道抗菌肽(ORTAP40)是从中国美利奴绵羊生殖道分离的一种新型的阳离子抗菌肽,在绵羊发育早期的防御中起到了主要的作用。在本研究中,根据ORTAP40 N端氨基酸序列设计引物,利用3′RACE技术克隆了绵羊生殖道抗菌肽3′末端全长cDNA序列,并被GenBank收录,登录号为FJ514476,经过cDNA序列分析显示,ORTAP40是一个4.8 ku的小肽,与先期分离纯化的分子质量一致。作者随后参照巴斯德毕赤酵母(Pichia pastoris)密码子偏好性,设计并人工合成了ORTAP40成熟肽目的基因片段,所合成的ORTAP40基因全长120 bp,通过基因重组的方法将目的基因克隆到pPIC3.5K和pPICZαA表达载体上,成功构建了重组酵母胞内表达载体pPIC3.5K-ORTAP40和外泌表达载体pPICZαA-ORTAP40,为抗菌肽的开发和应用奠定了基础。

关键词: 绵羊生殖道; 抗菌肽; cDNA克隆; 表达载体

Abstract: ORTAP40 is an antimicrobial peptide which is isolated from the reproductive tract of Ovis aries Chinese Merino. It plays a central role in the early innate immune defense against infection. In this study, we cloned the 3′ end full-length cDNA of ORTAP40 from reproductive tract of Ovis aries, using rapid amplification of cDNA ends (RACE) and N-terminus amino acids sequence(FJ514476). The observed cDNA structure indicated that ORTAP40 theoretical average molecular weight for the peptide of 40 amino acid residues is 4.8 ku in agreement with reported. A mature peptide gene was synthesized according to the amino acid sequence of ORTAP40 and the biased codon usage of Pichia pastoris, the gene was 120 bp in length and was inserted into Pichia pastoris expression vector pPIC3.5K, pPICZαA by gene recombination and constructed expression plasmid pPIC3.5K-ORTAP40 and pPICZαA-ORTAP40.

Key words: reproductive tract of Ovis aries; antimicrobial peptide; cDNA clone; expression vector

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