Banerjee Hirendra Nath, Krauss Christopher, Smith Valerie, Mahaffey Kelly, Boston Ava
Department of Natural Pharmacy and Health Sciences, Elizabeth City State University, University of North Carolina, Elizabeth City, NC-27909, USA.
J Bioprocess Biotech. 2016 Jun;6(6). doi: 10.4172/2155-9821.1000285. Epub 2016 Jun 30.
In order to meet the Renewable Fuels Standard demands for 30 billion gallons of biofuels by the end of 2020, new technologies for generation of cellulosic ethanol must be exploited. Breaking down cellulose by cellulase enzyme is very important for this purpose but this is not thermostable and degrades at higher temperatures in bioreactors. Towards creation of a more ecologically friendly method of rendering bioethanol from cellulosic waste, we attempted to produce recombinant higher temperature resistant cellulases for use in bioreactors. The project involved molecular cloning of genes for cellulose-degrading enzymes based on bacterial source, expressing the recombinant proteins in and optimizing enzymatic activity. We were able to generate bacterial expression systems to produce recombinant His-tag purified protein which showed cellulase like activity.
为了满足到2020年底可再生燃料标准中300亿加仑生物燃料的需求,必须开发用于生产纤维素乙醇的新技术。为此,利用纤维素酶分解纤维素非常重要,但这种酶不耐热,在生物反应器中较高温度下会降解。为了创造一种更生态友好的从纤维素废料中生产生物乙醇的方法,我们试图生产用于生物反应器的重组耐高温纤维素酶。该项目涉及基于细菌来源对纤维素降解酶基因进行分子克隆,在[具体表达系统]中表达重组蛋白并优化酶活性。我们能够构建细菌表达系统来生产重组His标签纯化蛋白,该蛋白显示出类似纤维素酶的活性。