线性脱乙酶复合体 (MiDAC) 识别HIV-1核心促进体,以控制激活的病毒基因表达
Emmanuelle Wilhelm1, Mikaël Poirier2, Morgane Da Rocha3
1OSE Immunotherapeutics, Nantes, France.
PLoS pathogens
|May 23, 2024
概括
科学家们确定了控制HIV转录和潜伏的关键宿主蛋白质 - - 线粒体脱乙酶复合体 (MiDAC) DNTTIP1和MIDEAS子单元,以及NAT10. 这些因素对艾滋病毒基因表达至关重要,并且代表了治疗艾滋病毒的潜在药物标.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 人类免疫缺陷病毒 (HIV) 在宿主基因组内建立潜伏储存库,阻碍治疗策略.
- 由5'HIV LTR启动并由Tat蛋白调节的HIV转录对于病毒复制和延迟控制至关重要.
- 了解参与HIV转录控制的宿主因素,特别是预启动复合体 (PICH),对于开发有效的HIV治疗非常重要.
研究的目的:
- 为了阐明宿主细胞预启动复合体 (PICH) 的蛋白质组成,这些复合体识别HIV核心促进者的TASHET区域.
- 调查已识别的宿主因子在Tat激活的HIV转录和潜伏中的作用.
- 探索这些宿主因子作为艾滋病毒治愈策略的治疗点的潜力.
主要方法:
- 用DNA亲和染色学来识别选择性地与TASHET序列结合的蛋白质.
- 生物物理技术和共免疫沉试验被用来描述蛋白质-DNA和蛋白质-蛋白质相互作用.
- 用基因沉默 (siRNA) 和局部定向突变发生来评估在艾滋病毒表达和潜伏逆转中确定的宿主因素的功能意义.
主要成果:
- 线性脱乙酶复合物 (MiDAC) 被确定为TASHET序列的选择性结合物.
- 米达克子单元DNTTIP1直接与TASHET结合,与米达克子单元MIDEAS和HDAC1/2相互作用,以及与Tat相互作用的蛋白质NAT10.
- 沉默DNTTIP1,MIDEAS或NAT10损害了HIV的表达,并阻止DNTTIP1结合的突变被延迟逆转剂阻断了HIV的活性.
结论:
- MiDAC子单元DNTTIP1和MIDEAS与NAT10一起,在Tat激活的HIV转录和维护HIV潜伏中发挥着至关重要的作用.
- 这些细胞周期调节的宿主因素是激活HIV基因表达的关键调节者.
- DNTTIP1,MIDEAS和NAT10代表了新的和有前途的药物标,用于开发实现艾滋病毒治愈的策略.
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