小鼠白血病病毒glycoGag通过ER-phagy受体RETREG1对SERINC5进行对抗
Iqbal Ahmad1, Jing Zhang1, Rongrong Li1
1State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China.
PLoS pathogens
|October 9, 2025
概括
鼠类白血病病毒 (MLV) 辅助蛋白质glycoGag使用复杂的机制,包括通过自的ER向,以克服宿主限制因子SERINC5,与HIV-1不同. 这揭示了逆转录病毒对选择性自的感染劫持.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 血清结合剂5 (SERINC5) 限制了包裹病毒的感染性,包括HIV-1和MLV.
- 像HIV-1 (Nef) 和MLV (glycoGag) 这样的病毒编码蛋白质来降低SERINC5.5的调节.
研究的目的:
- 为了比较MLV glycoGag和HIV-1 Nef用来对抗SERINC5.5的机制.
- 阐明glycoGag在向SERINC5在内质网膜 (ER) 的作用.
主要方法:
- 焦显微镜用于确定蛋白质定位.
- 蛋白质体降解试验.
- 免疫沉和西部涂抹.
- 通过RETREG1.1调解ER-phagy的分析.
主要成果:
- 与Nef不同,GlycoGag主要局限于细胞质,并迅速降解,但在SERINC5结合时稳定.
- 在细胞表面和ER上,GlycoGag降低了SERINC5的调节.
- 特定于ER的SERINC5下调是通过RETREG1通过微ER-phagy进行的.
结论:
- MLV glycoGag采用比HIV-1 Nef更复杂和更有效的策略来对抗SERINC5.5.
- 逆转录病毒利用选择性自途径,如ER-phagy,以克服宿主限制因素并增强病毒感染力.
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