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H19流感A病毒表现出特定物种的MHCII类受体使用情况

Umut Karakus¹, Ignacio Mena², Jithesh Kottur³

¹Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.

Cell host & microbe

|June 18, 2024

概括

新发现的禽流感病毒 (IAV) H19亚型与MHCII类结合,而不是酸,这表明宿主范围有限. 这一发现影响了对禽流感病毒及其动物传播潜力的理解.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
生态生态学生态生态学

背景情况:

禽流感A型病毒 (IAV) 在全球范围内对新型菌株进行监测.
之前的研究已经确定了使用MHCII类受体的蝙蝠起源IAV (H17和H18).
已经检测到IAV的H19亚型,但仍然没有表征.

研究的目的:

描述新型H19禽流感病毒血质素 (HA) 的特征.
为了确定H19.1的受体结合特性.
评估H19.19的宿主范围和动物感染潜力.

主要方法:

来自小的HA序列的家族遗传学分析.
使用酸和MHCII类的受体结合测定.
在细胞系中拯救复合H19 IAV.
确定H19 HA的晶体结构.

主要成果:

两种密切相关的H19 HA序列在较小的子中被确定.
H19 HA不与酸结合,但与MHCII类结合.
H19表现出特定物种的MHCII类使用情况,与蝙蝠IAV不同.
结构分析显示HA受体结合部位的突变阻止了酸相互作用.

结论:

H19代表了一种具有独特受体结合性质的新型鸟类IAV亚型.
特定物种的MHCII类使用限制了H19的宿主范围和动物感染潜力.
了解H19的进入机制为IAV进化和宿主适应提供了洞察力.

关键词:

结构 HA 结构 HA 结构在MHCII类中,MHC是II类.禽流感病毒监测禽流感病毒监测入口受体的入口受体是什么甘氨酸阵列的甘氨酸阵列是什么血凝素亚型H19 H19的亚型主机范围的主机范围.甲型流感病毒是流感病毒.受体结合部位是受体的结合部位.复合型H19流感A型病毒.

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