DND1-NANOS3复合体通过mRNA 3' UTRs中的七核酸序列来塑造原始生殖细胞转录组
Masataka Suzawa1, Chen Qiu2, Ahsan H Polash1
1RNA Molecular Biology Group, National Institute of Arthritis and Musculoskeletal and Skin Disease, NIH, Bethesda, MD 20892, USA.
bioRxiv : the preprint server for biology
|October 3, 2025
概括
RNA结合蛋白DND1和NANOS3形成了一个复合体,可以识别特定的RNA序列 (N3-DRE),以控制生殖细胞中的基因表达,确保正常发育.
科学领域:
- 分子生物学分子生物学
- 发育生物学 发展生物学
- 在RNA生物学,RNA生物学.
背景情况:
- DND1和NANOS3对于原始生殖细胞的生存至关重要.
- 它们的重叠功能表明它们具有共同的监管作用,但机制尚不清楚.
研究的目的:
- 阐明DND1和NANOS3共同调节目标mRNA的机制.
- 为了识别DND1-NANOS3复合体识别的特定RNA基因.
主要方法:
- 随后进行高通量测序 (Tandem PAR-CLIP) 来识别RNA目标.
- 在小鼠原始生殖细胞 (PGC) 中进行基因组编辑,以验证功能重要性.
- 进行X射线晶体学以确定RNA识别的结构基础.
主要成果:
- 鉴定了一种DND1-NANOS3核糖蛋白复合体,该复合体能够在向mRNA中识别AUGAAUU 核酸基因 (N3-DRE).
- 含有N3-DREs的mRNA,包括CDK1,在DND1-或NANOS3-缺乏的生殖细胞中被上调.
- 在小鼠PGC中,N3-DRE对Cdk1抑制至关重要.
- 晶体结构揭示了一个连续的RNA结合表面,用于高亲和度,序列特定的识别.
结论:
- 定义了N3-DRE介导的mRNA调节在生殖细胞发育中的分子和功能基础.
- 建立了一个范式,其中两个具有有限个体特异性的RNA结合蛋白共同创建一个高信息RNA基因.
- 提出了这种"双因素授权"作为一种潜在的机制,以保护基因调节免受异常的核糖蛋白表达.
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