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Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: July 1, 2013
艾滋病病毒的蛋白质网络正在芽
Uta K von Schwedler1, Melissa Stuchell, Barbara Müller
1Department of Biochemistry, University of Utah, Salt Lake City, UT 84132, USA.
Cell
|September 25, 2003
概括
病毒的释放,包括艾滋病毒,依赖于细胞蛋白质,这些细胞蛋白质形成多层细胞体 (MVB). 人类E类蛋白质的网络对于MVB生物发生至关重要,对于HIV粒子芽和释放至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 人类免疫缺陷病毒 (HIV) 的释放取决于细胞蛋白TSG101.1.
- TSG101将蛋白质分类为多胞体 (MVB),这些蛋白质参与了艾滋病毒的芽.
- 其他参与MVB生物发生的蛋白质在HIV释放中的作用尚不清楚.
研究的目的:
- 调查参与MVB生物发生的其他人类E类蛋白是否参与HIV释放.
- 阐明人类E类蛋白质的蛋白质-蛋白质相互作用网络.
- 确定这些蛋白质在病毒芽过程中的直接参与.
主要方法:
- 22个候选人人类E类蛋白质的鉴定.
- 分析蛋白质与蛋白质相互作用,绘制网络图.
- 测试特定蛋白质与病毒Gag蛋白质的结合.
- 主导阴性突变体的表达,以评估对艾滋病毒芽的影响.
主要成果:
- 确定了22个人类E类蛋白质的连贯网络,由43个相互作用联系在一起.
- 发现AIP1是早期 (TSG101/ESCRT-I) 和晚期 (CHMP4/ESCRT-III) 途径复合体之间的关键连接器.
- AIP1直接与HIV-1p6 () 和EIAVp9 () 蛋白结合.
- 在HIV-1颗粒中检测到人类E类蛋白质.
- 晚起作用的E类蛋白质的主导阴性突变抑制了HIV-1的芽.
结论:
- 已经定义了一种对人类MVP生物生成至关重要的蛋白质网络.
- 整个网络都参与了艾滋病毒的传播.
- 这些发现表明,这种MVB生物发生网络可能参与了许多其他病毒的释放.
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