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腺病毒蛋白VII与HMGB1的A盒结合,抑制干扰素反应
Edward A Arnold1, Robin J Kaai2, Katie Leung1
1Department of Microbiology, University of Washington, Seattle, Washington, United States of America.
PLoS pathogens
|September 13, 2023
概括
腺病毒蛋白VII在染色质中的高流动性组盒1 (HMGB1) 隔离,防止炎症信号. 这种相互作用特别抑制了干扰素β的产生,通过抑制先天免疫反应来帮助病毒感染.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 病毒利用宿主蛋白质促进感染并抑制免疫防御.
- 腺病毒蛋白VII凝结病毒DNA并破坏宿主染色体.
- 高流动性组盒1 (HMGB1) 是一种参与染色质结构和炎症信号传递的核蛋白.
研究的目的:
- 调查腺病毒蛋白VII和HMGB1.1之间的相互作用机制.
- 确定蛋白VII-HMGB1封存如何影响宿主转录和天生的免疫力.
主要方法:
- 细菌双杂交相互作用试验.
- 人类细胞培养和细胞分离.
- 对蛋白 VII-HMGB1 相互作用域和翻译后修改的分析.
主要成果:
- 蛋白VII直接结合HMGB1的A盒,这种相互作用是由HMGB1的C端尾调节的.
- 蛋白VII导致含有A盒结构的不溶性,防止HMGB1的释放.
- 这种分离独立于HMGB1的DNA结合,但需要对蛋白VII进行翻译后的修改.
- 蛋白VII以HMGB1依赖的方式抑制干扰素β的表达.
结论:
- 腺病毒蛋白VII通过它的A盒劫持HMGB1以抑制先天免疫反应.
- 蛋白VII介导的HMGB1封存特别抑制干扰素β的产生,促进病毒感染.
- 了解这种相互作用为病毒免疫逃避策略提供了见解.
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