截断的海洋酸酸酶的异质表达和功能特征
Qianqian Shao1, Chaoying Yao1, Xingbin Wang1
1State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.
Applied biochemistry and biotechnology
|October 14, 2025
概括
一种新型的截断酸酶突变体CD317表现出比母酶高出1.4倍的活性. 这种增强的酶显示出在酸盐寡糖化物生产中的工业应用的巨大潜力.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 海洋生物技术 海洋生物技术
背景情况:
- 酸酶对于生产酸寡糖酸盐至关重要,在医学和能源领域有应用.
- 海洋衍生的酸酶 (Algl) 是这一领域的关键酶.
- 提高酶活性和稳定性对于工业可行性至关重要.
研究的目的:
- 为了设计一种更活跃,更稳定的海洋酸盐酶 (Algl) 的截断突变体.
- 描述酶特性并优化工程突变的生产.
- 评估增强的酸盐溶解酶的工业潜力.
主要方法:
- 在酵母宿主中设计和表达海洋酸盐酶Algl的截断突变.
- 酶活性测定,包括基质特异性 (多M和多G) 和温度/Ca2+影响.
- 优化发酵条件 (培养时间,注射剂,诱导剂度) 和生物反应器培养.
主要成果:
- 一种高度活跃的截断突变体CD317被确定具有比野生型Algl.gl.高出1.4倍的酶活性.
- CD317表现出对聚的偏好,并表现出更好的温度耐受性.
- 优化的生物反应器发酵与井板方法相比,产量增加了4.6倍 (19,500 U/mL).
结论:
- 截断的酸盐酶突变CD317具有显著增强的活性和稳定性.
- 优化的发酵和生物反应器生产策略使高产量的酶回收成为可能.
- CD317显示出在酸盐加工中具有高性价比的工业应用的巨大潜力.
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