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揭示FGF12细胞释放的关键步骤揭示了非传统的FGF蛋白质分泌的常见机制
Martyna Biadun1, Martyna Sochacka2, Marta Kalka1
1Department of Protein Engineering, Faculty of Biotechnology, University of Wroclaw, Joliot-Curie 14a, Wroclaw, 50-383, Poland.
Cellular and molecular life sciences : CMLS
|August 19, 2024
概括
纤维细胞生长因子12 (FGF12) 可以通过涉及ATP1A1和特定脂质的新途径在细胞外分泌. 这种非传统的分泌机制对FGF12a至关重要,但对FGF12b至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 纤维细胞生长因子12 (FGF12) 是FGF同源因子 (FHFs) 子家族的一部分.
- 以前,FHF被认为是非信号细胞内蛋白质.
- 最近的发现表明,FHFs可以在细胞外分泌,特别是在压力下.
研究的目的:
- 为了阐明FGF12长"a"异型的分泌途径.
- 为了确定FGF12分泌的关键因素和区域.
- 为了比较FGF12a和FGF12b异型的分泌机制.
主要方法:
- 研究了Na(+) /K(+) ATPase A1亚单元 (ATP1A1),Tec 激酶和脂质 (氨酸酸,氨酸) 在FGF12分泌中的作用.
- 分析了FGF12a蛋白序列的特定区域,这些区域对于分泌至关重要.
- 在各种条件下利用技术来评估蛋白质局部化和相互作用.
主要成果:
- 长"a"异型FGF12通过涉及ATP1A1,Tec激酶和特定脂质的途径分泌.
- FGF12的短"b"异型表现出较低效率的与ATP1A1和酸素的结合,导致其缺乏分泌.
- 关键区域,包括N端片段和FGF12a的特定残留物,被确定为其分泌的关键区域.
- 液-液相分离被提出作为一种潜在的机制,涉及到分泌过程.
结论:
- FGF12a的分泌是一个活跃的,受调节的过程,取决于特定的分子相互作用和蛋白质域.
- FGF12异型的分泌差异与它们对分泌途径的关键成分的结合亲和关系有关.
- 已识别的FGF12分泌机制可能代表非传统分泌的FGF蛋白的常见途径.
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