来自Gibberella intermedia的Nitrilase GiNIT有效地降解了从油菜中提取的酸盐,即食用葡萄糖酸盐
Han-Zhi Li1, Ming-Yu Liu1, Yu-Yue Wang1
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning 530004, China.
研究人员从Gibberella intermedia中发现了一种新型的利酶酶,通过降解有毒利,有效地排毒了菜粉. 这种酶提供了一种有前途的解决方案,用于改善菜粉在动物料中的使用.
科学领域:
- 生物技术是生物技术.
- 酶学 是一种酶学.
- 动物营养 动物营养
背景情况:
- 麦粉含有像葡萄糖酸盐这样的抗营养化合物,在动物中降解为有毒的酸盐 (3-丁酸盐,4-丁酸盐).
- 关于能够降解这些特定的葡萄糖酸盐衍生烯酸的烯酸酶的研究是有限的.
研究的目的:
- 识别和表征一种新型的化酶,用于清除油菜粉的毒素.
- 为了评估该酶在降解菜粉中发现的有毒利的效率.
主要方法:
- 来自Escherichia coli中的Gibberella intermedia的亚酸酶基因 (GiNIT) 的过度表达.
- 重组亚酶 (rGiNIT) 的净化和表征.
- 酶活性测定使用3 - - 丁尼和4 - - 丁尼作为基质.
- 网站导向的突变发生和分子对接分析,以了解酶基质相互作用.
主要成果:
- 在最佳条件下 (pH 7.5,45 °C) 复合酸酶rGiNIT表现出高特异性活性 (134.48 U/mg为3-丁烯,122.16 U/mg为4-丁烯).
- 实现了高的转化率:81.89%的3-丁烯 (15分钟) 和80.23%的4-丁烯 (300分钟).
- 在基质结合口袋中确定了13种关键的氨基酸残留物,这些残留物对催化活性至关重要.
结论:
- 该研究提出了一种高效的化酶 (rGiNIT) 通过降解有毒化物来排毒菜粉.
- 提供一种潜在的酶资源,以改善牛油菜在动物料中的利用率.
- 为化酶的蛋白质工程提供理论见解.
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