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凝衍生的碳量子点和Apo-myoglobin之间的分子相互作用:对碳纳米材料框架的影响
Shima Masoudi Asil1, Mahesh Narayan2
1The Environmental Science & Engineering Program, The University of Texas at El Paso, El Paso, TX 79968, USA.
International journal of biological macromolecules
|March 1, 2024
概括
碳量子点 (CQDs) 改变了氧存储蛋白质的结构,比如Apo-myoglobin,可能会影响它们的功能. 然而,这些纳米材料对神经母细胞瘤细胞的毒性较低.
科学领域:
- 生物材料科学 生物材料科学
- 纳米医学是一种纳米医学.
- 蛋白质生物化学 蛋白质生物化学
背景情况:
- 碳纳米材料 (CNM),包括碳量子点 (CQD),越来越多地用于生物医学应用.
- 了解CNM和生物大分子之间的分子相互作用至关重要,但仍然不完整.
研究的目的:
- 研究凝衍生CQDs对阿波-肌球蛋白 (apo-Mb) 的结构和功能的影响.
- 阐明 CNM - 生物巨分子相互作用背后的分子机制.
主要方法:
- 内在光谱法用于评估三级结构变化.
- 循环二极化 (CD) 和红外 (IR) 光谱分析二次结构变化.
- 在神经母细胞瘤细胞上进行血红细胞结合测试和细胞毒性测试.
主要成果:
- 在不同状态 (原生,部分展开,展开) 中,CQD诱导了Apo-Mb的显著构造变化.
- 二级结构分析揭示了从螺旋结构到卷轴结构的过渡.
- CQD与apo-Mb脊柱的相互作用损害了血红蛋白结合,可能会影响氧气储存.
- 神经母细胞瘤细胞在暴露于CQD时表现出持续的生存能力.
结论:
- 凝衍生的CQDs在分子层面上与阿波肌球蛋白相互作用,改变其结构和血结合能力.
- 这些发现提供了对CNM-生物巨分子相互作用的分子理解.
- 尽管对apo-Mb有结构性影响,但CQD的细胞毒性较低,这表明生物医学安全应用的潜力.
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