在Pichia pastoris中,高效分泌表达和对复合型III类人类类型原蛋白的表征
Zhi-Xiang Xiang1, Jin-Song Gong2, Jin-Hao Shi1
1Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Life Sciences and Health Engineering, Jiangnan University, Lihu Avenue No. 1800, Wuxi, 214122, People's Republic of China.
Bioresources and bioprocessing
|April 22, 2024
概括
研究人员开发了一种可持续的方法来生产复合型III类人类类型的原蛋白. 这一突破为食品,美容和医疗应用提供了高产量,高纯度的来源.
科学领域:
- 生物技术是生物技术.
- 生物化学 生物化学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 原蛋白是人体中最丰富的蛋白质,对许多生物功能至关重要.
- 在食品,美容和医疗行业,对原蛋白的市场需求很高.
- 目前的原蛋白来源在可持续性和可扩展性方面面临限制.
研究的目的:
- 开发一种可持续且经济可行的方法来生产复合型III类人类原蛋白.
- 使用先进的发酵技术,实现高产量和目标蛋白质的纯度.
- 描述产生的原蛋白,以确认其结构和组成的完整性.
主要方法:
- 基因整合改造型III类人类类型原α1链进入P. pastoris基因组.
- 促进剂工程和高密度发酵的应用,采用两阶段养策略.
- 使用亲和性染色学进行净化,并通过N/C终端测序,氨基酸分析,UV-Vis,FTIR和质谱学进行表征.
主要成果:
- 实现了1.05g/L的可溶性分泌表达的重组型III类人类原的创纪录产量.
- 在 affinity 净化后获得 96% 的纯度.
- 确认了蛋白质序列,Gly-X-Y重复和氨基酸组成 (27.02%的甘氨酸,23.92%的氨酸) 与原蛋白一致.
- 谱学和质谱学分析验证了原特性以及二聚和三聚形式的存在.
结论:
- 成功建立了一种可持续和具有成本效益的生产系统,用于重组型III类人类类型的原蛋白.
- 生产的原蛋白表现出与原生原蛋白一致的特性,使其适合各种应用.
- 这一进步为食品,化品和制药行业不断增长的需求提供了可靠的来源.
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