通过使用粉作为碳源的工程化Halomonas蓝色菌生成来生产多基酸盐
Yuzhong Liu1, Xueqi Song1, Weinan Yang2
1Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
International journal of biological macromolecules
|February 2, 2024
概括
一种新型的氨酶,Amy03713,可以有效地将粉转化为多基氨酸 (PHAs). 这种酶在各种温度,pH值和盐度中表现出强大的活性,因此非常适合工业PHA生产.
科学领域:
- 生物技术是生物技术.
- 酵素工程是什么意思 酵素工程
- 微生物发酵 微生物发酵
背景情况:
- 粉利用对于生物聚合物生产至关重要.
- 为工业应用开发强大的酶是必不可少的.
- 聚酸酸 (PHAs) 是一种具有多种应用的可生物降解塑料.
研究的目的:
- 选和表征一种用于粉利用的新型氨酶.
- 为了设计一个微生物宿主,从粉中有效地生产PHA.
- 使用新型氨基酶优化PHA生产.
主要方法:
- 来自Vibrio alginolyticus的α-amylase基因 (amy03713) 的查和克隆.
- 在大肠杆菌中Amy03713的异质表达,用于活性分析.
- 基因工程的Halomonas蓝色基因的港湾和表达的amy03713基因.
- 优化PHA生产的发酵过程.
主要成果:
- 艾米03713在45°C和pH7时表现出最佳活性,在温度 (25-75°C),pH (5-9) 和盐度 (高达25%的NaCl) 中具有广泛的稳定性.
- 再组合的H.蓝生成功利用了粉并产生了多3-基酸 (PHB),多3-基酸-co-3-hydroxyvalerate (PHBV) 和多3-基酸-co-4-基酸 (P34HB).
- 优化的PHB生产从摇瓶中的粉中获得了6.32g/L的标位,这是该方法的记录.
结论:
- 艾米03713是一种高度稳定和多用途的氨酶,适合工业应用.
- 经过工程设计的H. bluephagenesis菌株为粉中的PHA生物合成提供了一个有前途的平台.
- 这项研究提出了一种有效的酶方法,用于可持续的PHA生产.
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