多种轮状病毒种类编码与融合相关的小跨膜 (FAST) 蛋白质,具有特定细胞类型的活性
Kylie Sartalamacchia1, Vanesa Veletanlic1, Julia R Diller1
1Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee, USA.
Journal of virology
|November 12, 2025
概括
与融合相关的小跨膜 (FAST) 蛋白质,如轮状病毒NSP1-1,介导细胞融合. 这项研究表明,来自各种轮状病毒物种的NSP1-1蛋白质主要诱导灵长类动物细胞中的合成细胞,N终端域指定了融合活性.
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:
- 与融合相关的小跨膜蛋白 (FAST) 是病毒蛋白,对于调解细胞-细胞融合和形成合成细胞至关重要.
- 之前的研究确定了人类B种轮状病毒NSP1-1作为一种FAST蛋白诱导灵长类动物细胞中的合成细胞,但不是动物细胞.
- 不同的轮状病毒物种中NSP1-1蛋白质的宿主特异性在很大程度上仍未被探索.
研究的目的:
- 研究各种轮状病毒物种的NSP1-1蛋白是否可以调解细胞-细胞融合.
- 为了确定NSP1-1融合活动的细胞类型特异性是否在不同的轮状病毒物种中保持.
- 确定负责人类B型轮回病毒NSP1-1.细胞特异性融合活动的特定蛋白质域.
主要方法:
- 生物信息学预测NSP1-1蛋白质结构和B,G和I种轮状病毒的域组织.
- 在多种细胞类型中NSP1-1蛋白的短暂表达,包括鸟类,犬类,仓鼠,人类,猪类和猿类.
- 通过交换轮状病毒NSP1-1和ortoreovirusp10之间的域来绘制功能域的工程仿真FAST蛋白.
主要成果:
- 来自B,G和I类轮状病毒的NSP1-1蛋白质在灵长类动物细胞中始终诱导合成,无论它们的病毒宿主来源如何.
- 非灵长类细胞类型的融合活性是有限的,这种限制并不总是可以通过蛋白质表达水平或RNA稳定性来解释的.
- 人类B型轮状病毒NSP1-1的N终端和跨膜域被确定为其细胞特异性融合活性的关键决定因素.
结论:
- 罗塔病毒B,G和I种NSP1-1蛋白质作为FAST蛋白质起作用,能够调解细胞-细胞融合.
- 这些NSP1-1蛋白质的N终端域在指定的目标细胞类型中起着重要作用.
- 这些发现为病毒宿主范围的决定因素和FAST蛋白的功能可塑性提供了洞察力,可能会影响治疗策略和理解病毒流行病学.
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