基于它们与受体蛋白的相互作用,对醇糖化物味道机制的计算模拟
Yuying Yuan1, Mst Nushrat Yiasmin1, Nerissa Arviana Tristanto1
1School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
International journal of biological macromolecules
|November 19, 2023
概括
醇糖化物 (SG) 提供强烈的甜味,因为它们与甜味受体 (TAS1R2) 稳定结合. 分子模拟揭示了SG的SG.
科学领域:
- 分子生物学分子生物学
- 食品科学 食品科学 食品科学
- 计算化学的计算化学
背景情况:
- 醇糖化物 (SG) 是天然的甜味剂,具有不同的口味特征.
- 它们的味觉感知背后的精确机制,特别是甜味强度,仍然不清楚.
- 了解SG受体相互作用对于开发有效的糖替代品至关重要.
研究的目的:
- 为了研究底层的分子机制的感知steviol糖化物 (SGs) 的味道.
- 探索不同的SG结构与甜味 (TAS1R2) 和苦味 (TAS2R4) 味觉受体的结合相互作用.
- 阐明SGS高甜度强度的结构基础.
主要方法:
- 对各种SG进行了分子对接模拟,使用人类甜味受体TAS1R2和苦味受体TAS2R4.
- 用分子动力学模拟来分析SG受体相互作用的稳定性随着时间的推移 (50 ns).
- 分析的重点是键形成和结合口袋几何.
主要成果:
- TAS1R2具有由四个线圈组成的灵活,开放的结合口袋,可以容纳甜味剂.
- 与TAS1R2结合的SG涉及多个键,有助于甜味.
- 较大的SG分子与TAS2R4形成较少的键,解释了它们缺乏苦味;RM与TAS2R4.4没有相互作用.
- SG-TAS1R2 相互作用在50 ns以上是稳定的,不同于分离的糖糖,表明持续的甜味.
结论:
- 醇糖化物与TAS1R2结合部位的持续和并发相互作用解释了它们的高甜度强度.
- SGs的特殊结构特征决定了它们的结合亲和力和味道特征.
- 分子模拟为天然甜味剂的结构-活性关系提供了宝贵的见解.
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