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性多糖胺单氧化酶的活性增加了纤维素基酶对纤维素的生产性结合能力

Camilla F Angeltveit¹, Tina Jeoh², Svein J Horn¹

¹Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway.

Bioresource technology

|September 28, 2023

概括

性多糖化单氧化酶 (LPMOs) 增强细胞聚酶与晶体纤维素的结合. 这种效果是延迟的,这表明脱晶,而不是直接裂变,改善了酶对纤维素分解的访问.

科学领域:

生物化学生化学
酶学是一种酶学.
生物技术是生物技术.

背景情况:

蜂基酶是纤维素降解的关键酶.
它们对晶体纤维素的效率受到限制,因为对纤维素链末端的访问受到限制.
性多糖体单氧化酶 (LPMOs) 可以启动纤维素表面的攻击.

研究的目的:

为了研究LPMO预处理对Trichoderma longibrachiatum cellobiohydrolase (TlCBHI) 的生产性结合能力的影响.
了解LPMO中介增强晶体纤维素上的细胞酶活性背后的机制.

主要方法:

应用一个强度计的纤维糖脱酶生物传感器来量化 TlCBHI 的结合.
用LPMOs对晶体纤维素进行预处理,持续时间不同 (5小时和24小时).
在LPMO处理后对TlCBHI生产结合能力的分析.

主要成果:

一个24小时的LPMO预处理显著增加了TlCBHI的生产性结合能力.
经过5小时的LPMO预处理,对结合能力的影响很小,甚至没有任何影响.
观察到LPMO活动在5小时左右下降.

结论:

TlCBHI的增强结合能力很可能是由于LPMO诱导的纤维素脱晶,而不是直接的链裂.
LPMO预处理可以提高细胞酶在分解晶体纤维素的效率.
了解这些相互作用对于优化酶性纤维素水解过程至关重要.

关键词:

度度生物传感器生物传感器酶性糖化是一种酶性糖化.LPMO 的预处理.微晶纤维素的微晶纤维素.这就是TlCBHI.

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