人类中性粒细胞α-defensins的生产性折叠在体外没有pro-peptide的情况下
Zhibin Wu1, Robert Powell, Wuyuan Lu
1Institute of Human Virology, University of Maryland Biotechnology Institute, 725 West Lombard Street, Baltimore, MD 21201, USA.
Journal of the American Chemical Society
|February 27, 2003
概括
人类中性粒细胞α-defensins (HNPs) 可以在没有它们的抑制性前的情况下有效地产生. 这一突破为产生纯HNP提供了可扩展的方法,对抗菌研究和潜在的HIV-1疗法有价值.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 蛋白质化学 蛋白质化学
背景情况:
- 人类中性粒细胞α-defensins (HNPs) 是对于先天免疫至关重要的阴性抗菌蛋白,储存在中性粒细胞颗粒中.
- HNP对抗HIV-1感染具有潜在的治疗价值,但它们在没有pro-peptide的情况下进行*in vitro*重新折叠是具有挑战性的.
- 抑制HNPs的前可能充当分子内伴侣,帮助Cys丰富的防御蛋白域的折叠.
研究的目的:
- 开发一种有效的 *in vitro* 折叠人类α-defensins (HNPs) 没有它们的N-终端前的协议.
- 为了证明HNPs可以使用一种新的折叠策略来实现高产量和纯度.
- 建立一种广泛适用的方法来生产易聚合的,富含Cys的蛋白质.
主要方法:
- 研究了缺乏N-终端前区域的HNP的*in vitro*折叠.
- 使用了一种含有2M尿素和25%N,N-二甲基形式胺 (DMF) 的特殊缓冲系统.
- 通过已建立的生化分析评估蛋白质折叠效率和纯度.
主要成果:
- 在没有亲区域的情况下实现了HNP的生产折叠,产量超过80%.
- 证明了高纯度的人类α-defensins的成功生产.
- 验证了针对容易聚合的蛋白质开发的协议的效率.
结论:
- 已经建立了一个生产大量纯人类α-防御素 (HNP) 的高效协议.
- 这种方法克服了以前与HNP在没有它们的前的情况下进行*in vitro*折叠相关的困难.
- 该协议广泛适用于生产其他具有挑战性的富含Cys和易聚合的蛋白质.
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