在酶去化的蛋白中,结构修改和对胆盐的增强亲和力.
Chunjie Liu1, Yating Wu1, Guoguo Jin1
1College of Tea and Food Science, Anhui Agricultural University, 130 Changjiang West Road, Hefei, 230036, Anhui, PR China.
Food chemistry: X
|July 22, 2024
概括
蛋白蛋白水解剂结合胆盐,有助于降低胆固醇. 消化稍微降低了这种能力,但较小,无序的蛋白质结构增强了胆汁盐的结合效率.
科学领域:
- 生物化学 生物化学
- 食品科学 食品科学 食品科学
- 分子生物学分子生物学
背景情况:
- 蛋白质 - 胆汁盐相互作用对于胆固醇代谢至关重要.
- 蛋白质与胆盐结合的确切机制尚不完全理解.
- 蛋白蛋白水解剂 (EWPH) 显示出降胆固醇效应的潜力.
研究的目的:
- 调查模拟胃肠道消化对EWPHs胆盐 (BS) 结合能力的影响.
- 阐明蛋白蛋白 (EWP) 结构与其BS结合能力之间的关系.
- 为了澄清EWP-BS结合的分子机制,使用peptidomics和分子对接.
主要方法:
- 模拟了EWPHs的胃肠道消化.
- 在消化前后分析BS结合能力.
- 粒子大小分析,电泳,以及富里埃变换红外光谱法 (FTIR).
- 体学和分子对接模拟.
主要成果:
- 与对照组相比,EWPHs表现出明显更高的BS结合能力,即使在消化后.
- 消化导致BS结合能力略有下降.
- 较小的颗粒大小,较低的分子量,以及与增强的BS结合相关的更混乱的蛋白质结构.
- 特定的 (FVLPM,GGGVW) 显示出低胆固醇的潜在作用.
结论:
- EWPHs具有固有的胆盐结合特性,有利于胆固醇管理.
- 蛋白质的结构特征,特别是乱和较小的尺寸,是增强胆汁盐结合的关键决定因素.
- 已识别的提供了管理胆固醇水平的潜在治疗标.
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