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一个非正规的糖蛋白H复合物增强了细胞巨型病毒的进入
Michael J Norris1,2, Lauren A Henderson3,4, Mohammed N A Siddiquey3
1Center for Vaccine Innovation, La Jolla Institute for Immunology, La Jolla, CA.
bioRxiv : the preprint server for biology
|October 17, 2024
概括
一种新发现的人类细胞巨乳病毒 (HCMV) 糖蛋白复合体,即"3-mer",增强了内皮细胞感染. 这一发现揭示了HCMV疫苗和抗病毒疗法的新目标.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- 人类细胞巨乳病毒 (HCMV) 导致严重的健康问题和经济负担.
- 了解HCMV蛋白质复合体对于疫苗开发至关重要.
- gH/gL糖蛋白复合体对于病毒进入赫尔佩斯病毒群至关重要.
研究的目的:
- 为了识别和表征参与细胞进入的新型HCMV糖蛋白复合体.
- 阐明以前未知的HCMV病毒表面复合物的结构和功能.
- 探索HCMV疫苗和抗病毒疗法的新目标.
主要方法:
- 低温电子显微镜 (Cryo-EM) 用于确定糖蛋白复合物的结构.
- 生物化学试验分析蛋白质与蛋白质相互作用.
- 感染试验评估复合体在内皮细胞进入中的作用.
主要成果:
- 一个新的HCMV糖蛋白复合体,称为"3-mer",在维里昂表面被确定.
- 三分子复合体由gH (没有gL),UL116和UL141组成.
- 冷-EM揭示了一个独特的结构,包括gH支架,UL141介导的二分化,以及糖化UL116盖.
- 这种复合物显著增强了内皮细胞的HCMV感染.
结论:
- HCMV 3-mer复合体代表了一个独特的病毒进入机制.
- UL116和UL141,在此背景下以前没有特征,是3-mer.的关键组成部分.
- 3-mer复合体是对抗HCMV的治疗干预的有希望的新目标.
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