在Pichia pastoris中复合纳表达:与甘衍生纳相比,结构和功能属性
Paz Shemesh1, Hanfeng Cai2, Raul-Ricardo Barzallo-Mora2
1Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 3200003, Israel; Resnick Sustainability Center for Catalysis, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
International journal of biological macromolecules
|August 8, 2025
概括
这项研究优化了Pichia pastoris生产复合纳 (rNapin),从而获得更高的产量. 由于其溶解性和乳化特性,rNapin在食品应用中表现有前途.
科学领域:
- 生物技术是生物技术.
- 食品科学 食品科学 食品科学
- 蛋白质工程是指蛋白质工程.
背景情况:
- 对替代蛋白质的日益增长的需求推动了对高效生产方法的研究.
- 罗拉产生的纳 (cNapin) 是一种天然的蛋白质来源,但其生产和加工存在挑战.
- 再组合蛋白质生产提供了一个可扩展的替代方案,以获得特定的蛋白质,如NAPIN.
研究的目的:
- 建立一种可扩展的方法,使用Pichia pastoris.生产复合纳 (rNapin).
- 为了比较rNapin的结构和功能性质与大麻衍生的napin (cNapin).
- 为了优化发酵条件以最大限度地提高rNapin产量.
主要方法:
- 使用Pichia pastoris作为用于重组蛋白表达的宿主.
- 采用了发酵优化,比较了平分体和二分体菌株中的GAP和AOX1促进体.
- 使用循环二元化 (CD) 和纳米差异扫描度学 (nanoDSF) 分析了蛋白质结构.
- 评估功能性质,包括可溶性,乳化活性和发泡性.
主要成果:
- 使用GAP促进剂的发酵优化显著增加了rNapin产量 (2.4倍与AOX1相比).
- 在双胞胎GAP菌株中进行进一步的菌株工程导致rNapin产量的额外增加1.5倍.
- rNapin的二次结构与cNapin相似,但其聚合性增加,热稳定性较低.
- 纳在pH范围内显示出高溶解度和优异的酸性乳化活性,但缺乏泡性.
结论:
- 皮奇亚牧草是一种有效的平台,用于可扩展的rNapin生产.
- 优化发酵和菌株工程对于最大限度地提高重组蛋白质产量至关重要.
- 纳具有有价值的功能性质,特别是溶解性和乳化性,使其成为食品应用的潜在候选者.
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