来自Trichoderma harzianum的多功能酶的表征及其在增强的酶性水解中的应用
Liang Liu1, Yu Zhang1, Yaru Huang1
1State Key Laboratory of Animal Biotech Breeding, and Key Laboratory of Soil Microbiology, Ministry of Agriculture, College of Biological Sciences, China Agricultural University, Beijing, China.
Bioresource technology
|November 3, 2024
概括
一种来自Trichoderma harzianum EM0925的新型酶BX1通过促进关键酶活动来增强纤维素糖糖化. 这提高了可发酵糖的产量,使生物转化更有效和更具成本效益.
科学领域:
- 生物技术和工业微生物学
- 酶工程是什么? 酶工程是什么?
- 生物质转换生物质转换
背景情况:
- 高效的纤维素糖糖化对于生物燃料和生化生产至关重要.
- 来自Trichoderma reesei的酶尾酒往往缺乏足够的β-葡萄糖酶,β-化酶和α-L-氨酸化酶活动.
- 由半纤维素衍生的寡糖很难有效地分解.
研究的目的:
- 为了识别和表征一种多功能酶,以提高对纤维素素糖的糖化.
- 阐明酶的多功能性的结构基础.
- 为了评估该酶与商业蜂酶和西兰酶制剂的协同作用.
主要方法:
- 在Trichoderma harzianum EM0925.25中发现了酶.
- 结构分析,分子对接和位点定向突变发生.
- 酶活性测定和协同效应评估与商业酶尾酒.
主要成果:
- 鉴定BX1,一个具有β-葡萄糖酶,β-化酶和α-L-氨酸化酶活动的多功能酶.
- 主要氨基酸残留物 (Asp389,Glu589,Gln185,Cys390,Tyr354,Tyr526) 的解,有助于BX1的多功能性.
- 当BX1被添加到Celluclast 1.5L时,可发酵糖产量显著增加 (90.23%在2%基质负荷下,22.14%在15%基质负荷下)
结论:
- BX1是一种有前途的酶,可以增强纤维素蛋白生物转化效率.
- 该酶的多功能性和协同效应可以显著提高糖产量.
- BX1为具有成本效益的糖化工艺和未来的酶工程提供了潜力.
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