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园艺学报 ›› 2006, Vol. 33 ›› Issue (4): 721-724.

• 研究论文 • 上一篇    下一篇

桃叶片β- 半乳糖苷酶基因全长cDNA克隆及原核表达

卞伟华1, 4;江昌俊2*;王朝霞3   

  1. (1 安徽农业大学茶叶生物化学与生物技术重点实验室, 安徽合肥230036; 2 安徽农业大学生物技术中心, 安徽合肥230036; 3 安徽教育学院生物系, 安徽合肥230061; 4 山东滨州医学院生化教研室, 山东滨州256603)
  • 收稿日期:2005-06-18 修回日期:2005-10-11 出版日期:2006-08-25 发布日期:2006-08-25

Cloning and Expression of β-galactosidase Gene cDNA in Peach

Bian Weihua1, 4;Jiang Changjun2*;Wang Zhaoxia3   

  1. ( 1 Key Laboratory of Tea Biochemistry & Biotechnology, Anhui Agricultural University, Hefei, Anhui 230036, China;2Biotechnology Center, Anhui Agricultural University, Hefei, Anhui 230036, China; 3Department of Biology, Anhui Institute of education, Hefei, Anhui 230061, China; 4Department of Biochemistry, Binzhou Medical College, Binzhou, Shandong 256603, China)
  • Received:2005-06-18 Revised:2005-10-11 Online:2006-08-25 Published:2006-08-25

摘要: 利用RT-PCR和RACE技术, 从蟠桃(Amygdalus persica var. compressa Bean) 中克隆出3 285 bp的β - 半乳糖苷酶基因cDNA全长, GenBank登录号为AY874412。该cDNA 2 559 bp, 编码853个氨基酸。将其插入到大肠杆菌表达载体pET-32a ( + ) 中, 转化BL21 trxB (DE3) , 筛选重组菌株。经IPTG诱导表达后, SDS-PAGE呈现约115 kDa特异表达条带。并通过体外酶促反应分析表达的融合蛋白的生物活性。

关键词: 桃, β - 半乳糖苷酶, cDNA末端快速扩增, cDNA克隆, 原核表达

Abstract: A 3 285 bp cDNA encoding β-galactosidase was cloned from compress peach by the methods of RT-PCR and rapid amplification of cDNA ends (RACE). The accession number is AY874412, which contains 2 559 bp, encoding a 853 residue polypeptide. The cDNA was constructed into the vector pET-32a( + ) designed for recombinant strain. After IPTG induction, it was observed there was a special band about 115 kDa on SDS-PAGE. The activity of the fusion protein was analyzed by in vitro enzymatic reaction.

Key words: Peach, β-galactosidase, Rapid amplification of cDNA ends, cDNA cloning, Prokaryotic expression