卡-SNARE合成素18调解了脂质滴滴与SNAP23和SEC22B的融合
Yuhui Fu1, Binbin Ding2, Xiaoxia Liu3
1Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Department of Pathophysiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Cell discovery
|November 21, 2023
概括
研究人员发现了一种新的SNARE蛋白质复合体,syntaxin 18 (STX18)-SNAP23-SEC22B,它驱动脂滴 (LD) 融合. 这一发现揭示了控制LD大小和数量的关键机制在代谢调节中.
科学领域:
- 细胞生物学 细胞生物学
- 代谢过程中的代谢.
- 分子机制的分子机制
背景情况:
- 脂质滴 (LD) 对于能量恒温至关重要,但控制它们的大小和数量的机制,特别是LD融合,尚未完全理解.
- SNARE蛋白调解膜融合事件,但它们在LD融合中的特定作用在很大程度上仍未被阐明.
研究的目的:
- 为了确定参与脂质滴体融合的特定SNARE蛋白质.
- 阐明SNARE蛋白质调解LD融合的分子机制.
主要方法:
- 在LDs上识别SNARE复杂组件.
- 在体外脂质混合和含量混合试验中使用复制的脂肪体.
- 调查CIDEC/FSP27与已识别的SNARE复合体之间的相互作用.
- 在小鼠肝脏中使用腺相关病毒 (AAV) 输送的合成素18 (STX18) 的体内淘汰.
主要成果:
- 一种新的SNARE复合物,合成素18 (STX18)-SNAP23-SEC22B,被确定并局部化到脂质滴.
- 通过脂质和内容混合试验,STX18-SNAP23-SEC22B复合物被证明可以在体外调解LD融合.
- 发现CIDEC/FSP27直接结合STX18-SNAP23-SEC22B复合体,并促进LD集群和脂质混合.
- 在高脂肪饮食条件下,小鼠肝脏中STX18的体内淘汰导致肝脏大小减少和LDs更小.
结论:
- SNARE复合体STX18-SNAP23-SEC22B在调解脂质滴滴融合中发挥着至关重要的作用.
- 这种SNARE复合体是控制脂质滴滴大小和数量的关键调节机制.
- 这些发现为脂质代谢和储存的分子基础提供了新的见解.
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