深度N-甘氨酸重塑伴随着MHC-II免疫呈现
Hayley Goodson1, Rebeca Kawahara1,2, Sayantani Chatterjee1,3
1School of Natural Sciences, Macquarie University, Sydney, NSW, Australia.
Frontiers in immunology
|November 29, 2023
概括
这项研究表明,未经加工和过度加工的N-甘氨酸在很大程度上改变了由MHC-II分子呈现的内源. 在抗原处理过程中这种N-甘氨酸重塑会影响免疫监测机制.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 免疫学研究免疫系统通过MHC分子呈现的来识别自我/非自我.
- 之前的工作确定了由MHC-II呈现的病毒上重塑的N-甘氨酸,但内源性N-甘氨酸修饰是未知的.
研究的目的:
- 研究由MHCII类分子 (MHC-II) 呈现的内源性上的N-甘氨酸重塑.
- 为了比较MHC-II结合的N-糖化模式与细胞糖蛋白质组.
主要方法:
- 多omics方法整合了免疫蛋白质组学,蛋白质组学和N-糖组学数据.
- 来自THP-1和MDA-MB-231细胞系的已发表数据集的分析.
- 从分离的MHC-II结合产生的新N-糖因子数据.
主要成果:
- 在内源性MHC-II免疫上,超加工 (基托生菌核,低曼诺基) 和未加工 (寡曼诺基) N-甘氨酸的发病率.
- 在MHC-II结合上缺乏复杂/混合型N-甘氨酸,与细胞糖蛋白质组形成鲜明对比.
- 在MHC-II处理过程中,有大量的N-甘氨酸削减的证据,特别是细胞表面甘氨酸蛋白.
结论:
- 内源性MHC-II免疫的特征是过度加工和过度加工的N-甘氨酸.
- 在MHC-II抗原处理过程中发生了广泛的N-甘氨酸修剪.
- 这些发现需要进一步的研究,以便对免疫监控的分子理解.
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