特定物种的gB ectodomain相互作用和细胞质域稳定性调节了简单疹病毒的融合
Qing Fan1, Richard Longnecker1, Sarah A Connolly2
1Department of Microbiology-Immunology, Feinberg School of Medicine of Northwestern University, Chicago, Illinois, USA.
mBio
|December 5, 2025
概括
疹病毒的进入依赖于gH/gL和gB蛋白质. 这项研究揭示了gH/gL和gBectodomains之间的相互作用对融合至关重要,而gB细胞质尾部域平衡了融合调节.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 结构生物学 结构生物学
背景情况:
- 疹病毒进入宿主细胞是一个复杂的过程,由病毒糖蛋白介导.
- gH/gL和gB糖蛋白构成了病毒融合的核心机制,推动了膜融合.
- 在进入过程中控制gH/gL和gB功能的精确分子相互作用仍然不完全理解.
研究的目的:
- 为了研究1型单纯疹病毒 (HSV-1) 和saemiriine herpesvirus 1 (SaHV-1) gB同类体之间的物种特异性相互作用.
- 为了绘制gB的功能域,参与介导病毒细胞融合.
- 阐明在疹病毒进入期间gB功能的调节机制.
主要方法:
- 构建和分析HSV-1/SaHV-1 gB仿真体,其中有交换的外域,膜近接区域 (MPR),跨膜域 (TMD) 和细胞质尾域 (CTD) 分段.
- 通过这些gB仿真体调解的病毒融合的功能评估.
- 对不同gB域的融合性质进行比较分析.
主要成果:
- 同型细胞质尾域 (CTD) 的gB相互作用不足以触发融合,表明gH/gL与gBectodomain接触.
- 与SaHV-1 CTD相比,HSV-1 gB CTD具有高源性.
- 与SaHV-1 MPR相比,HSV-1 MPR具有低原性,这表明域特异性对融合调节的贡献.
结论:
- 对于有效的疹病毒媒介融合,gH/gL和gBectodomains之间的功能相互作用是必不可少的.
- 通过其独特的领域,gB蛋白利用促进和抑制力量的平衡来调节融合.
- 这些发现为时间和空间控制的病毒进入提供了对gB功能的复杂调节的新见解.
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