广泛的PFAS与脂肪酸结合蛋白4的结合由可变结合模式启用.
Aaron S Birchfield1, Faik N Musayev2,3, Abdul J Castillo1
1Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States.
JACS Au
|June 27, 2025
概括
人类脂肪细胞脂肪酸结合蛋白4 (FABP4) 结合了各种和多基物质 (PFAS),包括更换旧化学品. 结构分析揭示了不同的结合方式,影响蛋白相互作用和潜在的代谢调节.
科学领域:
- 环境化学环境化学
- 结构生物学 结构生物学
- 毒理学 毒理学 毒理学
背景情况:
- 和多基基物质 (PFAS) 是已知的广泛存在的环境污染物.
- PFAS与生物蛋白的相互作用背后的分子机制尚不清楚.
研究的目的:
- 研究各种PFAS与人类脂肪细胞脂肪酸结合蛋白4 (FABP4) 的结合.
- 为了阐明PFAS-FABP4相互作用的结构基础.
- 了解这些相互作用对代谢调节的影响.
主要方法:
- 使用X射线结晶学来确定FABP4与PFOA,PFDA和PFHxDA结合的结构.
- 使用光竞争试验来测量结合亲和力.
主要成果:
- FABP4结合了各种各样的PFAS,包括新的化学品和长链 perfluorocarboxylic 酸.
- 对PFOA,PFDA和PFHxDA观察到三种不同的结合模式,受PFAS链长和头部组的影响.
- 结合 afinities 在低微分子范围,表明显著的相互作用.
结论:
- PFAS与FABP4的结合受化学结构和蛋白质构成的影响.
- 这些相互作用可能对FABP4在内分泌功能和代谢调节中的作用产生影响.
- 结构和生物化学见解对于理解PFAS毒理学和运输至关重要.
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