Molecular Cloning and Heterologous Expression of an Acid-Stable Endoxylanase Gene from Penicillium oxalicum in Trichoderma reesei

	Molecular Cloning and Heterologous Expression of an Acid-Stable Endoxylanase Gene from Penicillium oxalicum in Trichoderma reesei
	Wang Juan; Mai Guoqin; Liu Gang; Yu Shaowen
刊名	JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
	2013
英文摘要	An endoxylanase gene (PoxynA) that belongs to the glycoside hydrolase (GH) family 11 was cloned from a xylanolytic strain, Penicillium oxalicum B3-11(2). PoxynA was overexpressed in Trichoderma reesei QM9414 by using a constitutive strong promoter of the encoding pyruvate decarboxylase (pdc). The high extracellular xylanase activities in the fermentation liquid of the transformants were maintained 29~35-fold higher compared with the wild strain. The recombinant POXYNA was purified to homogeneity, and its characters were analyzed. Its optimal temperature and pH value were 50oC and 5.0, respectively. The enzyme was stable at a pH range of 2.0 to 7.0. Using beechwood as the substrate, POXYNA had a high specific activity of 1,856 ± 53.5 IU/mg. In the presence of metal ions, such as Cu2+, and Mg2+, the activity of the enzyme increased. However, strong inhibition of the enzyme activity was observed in the presence of Mn2+ and Fe2+. The recombinant POXYNA hydrolyzed birchwood xylan, beechwood xylan, and oat spelt xylan to produce short-chain xylooligosaccharides, xylopentaose, xylotriose, and xylobiose as the main products. This is the first report on the expression properties of a recombinant endoxylanase gene from Penicillium oxalicum. The properties of this endoxylanase make it promising for applications in the food and feed industries.
收录类别	SCI
原文出处	http://www.jmb.or.kr/journal/viewJournal.html?year=2013&vol=23&num=2&page=251
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/4847]
专题	深圳先进技术研究院_医工所
作者单位	JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY
推荐引用方式 GB/T 7714	Wang Juan,Mai Guoqin,Liu Gang,et al. Molecular Cloning and Heterologous Expression of an Acid-Stable Endoxylanase Gene from Penicillium oxalicum in Trichoderma reesei[J]. JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY,2013.
APA	Wang Juan,Mai Guoqin,Liu Gang,&Yu Shaowen.(2013).Molecular Cloning and Heterologous Expression of an Acid-Stable Endoxylanase Gene from Penicillium oxalicum in Trichoderma reesei.JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY.
MLA	Wang Juan,et al."Molecular Cloning and Heterologous Expression of an Acid-Stable Endoxylanase Gene from Penicillium oxalicum in Trichoderma reesei".JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY (2013).