来自人类VEGF促进者的备用轮胎DNAG-四重复的结构洞察力
Ines Burkhart1, Vivien Rose McKenney2, Julia Wirmer-Bartoschek1
1Institute for Organic Chemistry and Chemical Biology, Center for Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, Max-von-Laue-Str. 7, Frankfurt/Main, Hesse 60438, Germany.
ACS chemical biology
|May 16, 2025
概括
血管内皮生长因子 (VEGF) G-四重复合体 (G4s) 在癌症中至关重要. 这项研究描述了另一种VEGF G4 (VEGF1245) 的特征,揭示了其转移稳定的混合体构造和重新折叠的动力障碍,为基因调节提供了洞察力.
科学领域:
- 分子生物学分子生物学
- 生物物理学的生物物理.
- 基因组学就是基因组学.
背景情况:
- 血管内皮生长因子 (VEGF) 促进体中的富含关氨酸的序列形成G-四重复合体 (G4s).
- VEGF G4s与癌症进展,转录调节和基因组稳定性有关.
- 主要的VEGF G4 (VEGF1234) 具有平行拓,但在氧化应激下可能形成另一个VEGF1245形状.
研究的目的:
- 描述替代VEGF1245 G4的结构和稳定性.
- 为了研究VEGF1245和VEGF1234形状之间的重新折叠动态.
主要方法:
- 循环二重化 (CD) 光谱分析G4结构.
- 核磁共振 (NMR) 光谱法用于确定高分辨率结构.
- 摄影可变的保护群用于研究构造性转变.
主要成果:
- VEGF1245采用了混合G4形态.
- 在生理温度下,VEGF1245是热力学转基因稳定的,不会自发地重新折叠为VEGF1234.
- 从VEGF1245重新折叠到VEGF1234需要高温,这表明动力障碍.
结论:
- VEGF1245代表了一种独特的,动力捕获的转移性稳定形状.
- 这些发现提高了对VEGF G4结构多态性及其在转录调节和癌症中DNA修复中的作用的理解.
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