›› 2018, Vol. 30 ›› Issue (5): 771-777.DOI: 10.3969/j.issn.1004-1524.2018.05.14

• Horticulture Science • Previous Articles     Next Articles

Cloning and prokaryotic expression of 1-deoxy-D-xylulose-5-phosphate synthase encoding gene (BaDXS1) in Brassica alboglabra

XUE Shengling1, JIANG Min1, CHANG Jiaqi2, LIU Yang1, WEI Lin1, ZHOU Jiankun1, ZHANG Fen1, SUN Bo1,*   

  1. 1. College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China;
    2. Department of Horticulture, Zhejiang University, Hangzhou 310058, China
  • Received:2017-08-27 Online:2018-05-20 Published:2018-05-23

Abstract: The 1-deoxy-D-xylulose-5-phosphate synthase (DXS) encoding gene BaDXS1 was isolated from Chinese kale (Brassica alboglabra) leaves by using homologous cloning method. BaDXS1 contained an open reading frame of 2 139 bp in length, encoding 712 amino acids. Physical and chemical properties analysis indicated that the molecular weight of BaDXS1 protein is 77.21 ku, and the isoelectric point pI is 8.59. There was no transmembrane region, and BaDXS1 is located in chloroplast of plant cell. Amino acid sequences comparison results showed that the identities of BaDXS1 and those in Brassica oleracea, Arabidopsis thaliana, tobacco, tomato were all over 79%. Phylogenetic tree analysis showed that it had close relation with BoDXS. The prokaryotic expression vector pEASY-Blunt E1-BaDXS1 was constructed, and the protein was successfully expressed in the form of inclusion bodies in Escherichia coli.

Key words: Chinese kale, 1-deoxy-D-xylulose-5-phosphate synthase, gene cloning, prokaryotic expression

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