食品科学 ›› 2008, Vol. 29 ›› Issue (6): 222-225.

• 生物工程 • 上一篇    下一篇

甘油脱氢酶基因(dhaD)与二羟丙酮激酶基因(dhaKL)共表达

 郑艳, 管艺飞, 刘长江   

  1. 沈阳农业大学食品学院; 辽宁省人民政府
  • 出版日期:2008-06-15 发布日期:2011-08-26

Coexpression of Glycerol Dehydrogenase Gene (dhaD) and Dihydroxyacetone Kinse Gene (dhaKL)

 ZHENG  Yan, GUAN  Yi-Fei, LIU  Chang-Jiang   

  1. 1.College of Food Science,Shenyang Agricultural University; 2.Government of Liaoning Province
  • Online:2008-06-15 Published:2011-08-26

摘要: 以肺炎克雷伯氏菌As1.1736的基因组为模板,通过PCR技术成功地扩增了dhaD基因,并构建了dhaD和dhaKL基因的共表达载体。序列分析结果表明:dhaD基因全长1104bp,编码367个氨基酸残基。SDS-PAGE电泳结果表明:dhaD和dhaKL基因均获得了有效表达;上清液中酶活性分别为甘油脱氢酶23.2U/ml,二羟丙酮激酶25.6U/ml。

关键词: dhaD, 克隆, dhaKL, 共表达

Abstract: The gene of dhaD encoding glycerol dehydrogenase was amplified by PCR from the genomic DNA of Klebsiella. pneumoniae As1.1736 and the expression vector pET-28a(+)/dhaKL-dhaD was constructed. Sequence analysis showed that dhaD gene is 1104 bp length and encodes 367 amino acid residues; SDS-PAGE showed that the dhaKL gene and dhaD are expressed, and the enzyme activities of glycerol dehydrogenase and dihydroxyacetone kinase are 23.2 U/ml 25.6 U/ml respectively in supernant.

Key words: dhaD gene, colone, dha Kl gene, coexpression