可持续的结构性多糖体转化:DES预处理如何影响细胞酶吸附,从而改善纤维素蛋白酶消化?
Min Zhou1, Yuxuan Feng1, Haidong Li1
1State Key Laboratory of Pharmaceutical, School of Life Sciences, Nanjing University, Nanjing 210023, People's Republic of China.
Carbohydrate polymers
|December 23, 2023
概括
深度溶解剂 (DES) 预处理增强了糖草上的细胞质吸附,改善了生物质转化为降解糖的过程. 这种预处理改变了纤维素蛋白结构,有助于酶的可访问性和糖产量.
科学领域:
- 生物质转化和生物能源
- 生物化学工程 生物化学工程
- 材料科学 材料科学 材料科学
背景情况:
- 红纤维素的回收阻碍了有效的生物质转化为生物燃料和化学品.
- 预处理对于克服纤维素蛋白重复性至关重要.
- 深度浸泡溶剂 (DES) 提供了一个有前途的途径,用于纤维素素蛋白预处理.
研究的目的:
- 调查DES (La/ChCl) 预处理对草草的影响.
- 为了检查DES预处理对细胞酶对林氏纤维素的吸附的影响.
- 阐明增强酶吸附背后的机制及其与生物质转换的关系.
主要方法:
- 在各种条件下,使用DES (La/ChCl) 预处理了草.
- 细胞酶对预处理的纤维素素的吸附被量化.
- 分析了预处理生物质的物理化学特性,包括孔隙结构,结,含量,疏水性和泽塔潜力.
- 评估了特定细胞酶成分的吸附行为.
主要成果:
- DES预处理改变了孔隙结构,减少了特定表面积 (SSA),但增加了孔隙半径.
- 结合特征发生了变化,草和MCC的强度下降,但素的强度增加.
- 尽管预处理的红素不和度增加,但红素的去除得到了促进.
- 降低了疏水性,提高了 sorghum 草的分散性.
- 泽塔潜力转向了对草的阳性和对红素的负面.
- 观察到细胞酶成分 (BGs,CBHs,EGs,西兰酶) 的吸附差异.
结论:
- 预处理DES显著增强了细胞酶对基纤维素的吸附.
- 生物质物理化学性质的观察到的变化共同有助于改善酶的可访问性.
- 了解这些吸附机制为优化预处理策略提供了洞察力,以实现有效的生物质转化.
相关概念视频
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