识别有助于膜型5矩阵金属蛋白酶 (MT5-MMP) 处理粉样蛋白前体蛋白的结合伙伴
Hongjie Wang1, Madepalli K Lakshmana2, Gregg B Fields1
1Department of Chemistry & Biochemistry, Institute for Human Health & Disease Intervention (I-HEALTH), Florida Atlantic University, Jupiter, Florida, USA.
Journal of cellular physiology
|February 12, 2024
概括
阿尔茨海默病涉及粉样β斑.阿尔茨海默病涉及粉样β斑. 这项研究表明,膜型5矩阵金属蛋白酶 (MT5-MMP) 与粉样蛋白前体蛋白 (APP) 在各种细胞位置相互作用,增加粉样蛋白的产生. 特定的有约束力的合作伙伴增强了这种效果.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 阿尔茨海默病 (AD) 的特点是粉样β (Aβ) 斑块.
- 粉样蛋白前体蛋白 (APP) 处理和像Aβ这样的片段都与AD病原发生有关.
- 由膜型5矩阵金属蛋白酶 (MT5-MMP) 介导的APPη途径是AD的一个关键因素.
研究的目的:
- 通过MT5-MMP.确定APPη裂变的细胞内定位.
- 确定影响APP处理的MT5-MMP蛋白合作伙伴.
- 了解MT5-MMP在阿尔茨海默氏症病原发生中的作用.
主要方法:
- 在表达人类APP751.1.的CHO细胞中对MT5-MMP的局部化研究.
- 构建和分析针对各种有机体的MT5-MMP融合蛋白.
- 使用MT5-MMP的C端域识别结合伙伴的酵母双混合选.
主要成果:
- MT5-MMP在细胞核,细胞质和细胞质颗粒中被发现.
- 将MT5-MMP向内分体,戈尔吉细胞,血膜或线粒体的向增加了可溶性APPη (sAPPη).
- 包括N4BP2L1,EIG121,BIN1和TMX3在内的绑定合作伙伴在绑定到MT5-MMP时显著提高了sAPP的生产.
结论:
- MT5-MMP 在多个细胞区中对 APP 起作用.
- MT5-MMP对APP的影响是由特定的有约束力的合作伙伴促进的.
- 这种相互作用代表了阿尔茨海默病发展的重要途径.
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