Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (2): 153-159.doi: 10.13560/j.cnki.biotech.bull.1985.2015.02.023

• Research Report • Previous Articles     Next Articles

Cloning,Expression and Characterization of Acetyl Xylan Esterase from Streptomyces griseus

Liu Weina, Liang Di, Wang Xiaoyu, Yu Wangning, Hou Lingyu, Jin Yi, Xie Xiangming   

  1. College of Biological Sciences and Technology,Beijing Forestry University, Beijing 100083
  • Received:2014-08-12 Online:2015-02-05 Published:2015-02-06

Abstract: Primers were designed by putative axe annotated from the whole genome sequence of Streptomyces griseus. The axe gene was firstly cloned and linked to the prokaryotic expression vector, expressed recombinant protein induced with IPTG and purified with the Ni-NTA affinity chromatography. The results showed the cloned gene axe contained an open reading frame of 1 008 bp encoding 336 amino acid residues. The transformant harboring pET28a-Sgraxe was expressed with a protein molecular weight of 37 kD by SDS-PAGE analysis. The results indicated that the purified recombinant enzyme exhibited optimum activity at pH8.0 and 50℃, high thermal stability and strong alkali resistance range. Metal ions on recombinant enzyme activity was inhibited especially Zn2+. The analysis of recombinant enzymatic properties reveals potential application in industry.

Key words: Streptomyces griseus, acetyl xylan esterase, prokaryotic expression, purification, enzymatic properties