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Position: Home > Articles > Construction of Chlorophyll Degradation Engineering Bacteria Journal of Henan Agricultural Sciences 2017 (6) 39-42

叶绿素降解工程菌株的构建

作  者:
杨宗灿;张展;彭玉富;侯佩;聂聪;马宇平
单  位:
河南中烟工业有限责任公司技术中心;郑州轻工业学院食品与生物工程学院
关键词:
烟叶;工程菌株;叶绿素酶基因;重组蛋白;叶绿素降解
摘  要:
为特异、高效地降解烟叶中的叶绿素,从模式植物拟南芥中克隆获得了叶绿素酶基因At CLH1片段,大小为975 bp。通过构建表达载体p ET28a-At CLH1,并转化大肠杆菌BL21,获得了重组工程菌株。该菌株在30℃下,经0.5 mmol/L IPTG诱导培养22 h,可较好地表达重组蛋白At CLH1,蛋白质电泳图谱显示其大小约为35 ku。该菌株的叶绿素酶活力可达24.9 U/m L,能够明显降解烟叶提取物中的叶绿素,在提升低次烟叶品质方面具有很好的应用前景。
译  名:
Construction of Chlorophyll Degradation Engineering Bacteria
作  者:
YANG Zongcan;ZHANG Zhan;PENG Yufu;HOU Pei;NIE Cong;MA Yuping;Technology Center,China Tobacco Henan Industrial Co.,Ltd.;College of Food and Biological Engineering,Zhengzhou University of Light Industry;
关键词:
tobacco leaf;;engineering bacteria;;chlorophyllase gene;;recombinant protein;;chlorophyll degradation
摘  要:
For the specific and efficient degradation of chlorophyll in tobacco leaves,the chlorophyllase gene At CLH1 containing a full coding region of 975 bp was cloned from Arabidopsis thaliana. At CLH1 gene was cloned into vector p ET28 a,and the vector was then transformed into E. coli BL21 cells,finally the recombinant engineering bacterium was obtained. After culturing under 30 ℃ for 22 h,the protein At CLH1 could express well with 0. 5 mmol/L IPTG( isopropy-β-D-thioga Iactopyranoside) as inducer. Sodium dodecyl sulfate( SDS) fingerprint results showed that the molecular mass of At CLH1 was 35 ku. The activity of At CLH1 was 24. 9 U/m L,which could degrade the chlorophyll in tobacco extract and had a good application prospect in improving the quality of low quality tobacco.

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