通过ADAM17和γ-分泌酶蛋白分解处理调节梅特克表面表达
Kevin C Lahey1, Christopher Varsanyi1, Ziren Wang1
1Department of Microbiology, Biochemistry and Molecular Genetics, Center for Cell Signaling, Rutgers New Jersey Medical School, 205 South Orange Ave, Newark, NJ 07103, USA.
International journal of molecular sciences
|April 27, 2024
概括
由ADAM17和玛分泌酶进行的Mertk (Mer tyrosine kinase) 裂变是一种调节其水平的恒常性过程. 这种蛋白质分离调节可以防止单细胞和巨细胞中Mertk过度活化.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 默氨酸激酶 (Mertk) 是一种受体氨酸激酶,涉及到细胞分裂和炎症解决.
- 梅特克还在癌症中发挥作用,促进骨髓状细胞的增殖,生存和免疫逃避.
- 了解梅特克的后翻译调节对于其生理学和病理生理学作用至关重要.
研究的目的:
- 研究单细胞/巨细胞中Mertk表达的翻译后调节.
- 开发一个记者细胞系来研究梅特克细胞内贩运.
- 阐明控制Mertk水平的蛋白质分解机制.
主要方法:
- 利用PMA差异化的THP-1细胞模型研究梅特克调节.
- 开发了一种新的梅特克记者细胞系,用于细胞内贩运研究.
- 采用ADAM17和玛分泌酶抑制剂,蛋白质酶抑制剂MG132和模拟的梅特克记者受体.
主要成果:
- 通过PMA处理,可以对Mertk和ADAM17进行上调调节,同时对Gas6和Pros1.1进行差异调节.
- 默特克在恒温条件下通过ADAM17和马分泌酶进行构成性蛋白质分解裂变.
- 梅特克的细胞内片段通过蛋白酶体依赖的机制降解,不会转移到核中.
- 活性气体6通过溶酶体蛋白解影响梅特克清除.
结论:
- 复杂的蛋白质溶解活动,包括ADAM17和玛分泌酶的顺序作用,调节了Mertk ectodomain裂变.
- 这种切割作用作为一个平静的负调节机制,以防止Mertk过度激活.
- 了解梅特克蛋白质溶解过程,可以了解它在正常生理学和癌症中的作用.
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