内部聚氨基化衍生的长非编码RNA调节核细胞完整性和功能
Sumana Mallick1,2, Pranita Borkar1, Jaspreet Thind1,2
1Department of Cell Biology and Genetics, Texas A&M University Health Science Center, Bryan, TX 77807.
概括
内部多基化 (IPA) 生成非编码RNA,如CUL1-IPA. 这种长长的非编码RNA保持了核的完整性,支持rRNA处理,并影响细胞循环的进展和癌症患者的生存.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 蛋白质编码基因通常会产生mRNA用于翻译.
- 在转录起始点附近的内部多基化 (IPA) 从蛋白质编码位置产生非编码RNA.
- 这些丰富的IPA衍生的非编码RNA的功能在很大程度上是未知的.
研究的目的:
- 通过IPA调查CUL1-IPA的功能,一种非编码RNA通过IPA从CUL1基因位点衍生出来.
- 探索CUL1-IPA在细胞过程中的作用,特别是细胞核功能及其在疾病中的潜在影响.
主要方法:
- 确定了CUL1-IPA作为一种依赖RNA聚合酶II的稳定,多基化非编码RNA.
- 评估了CUL1-IPA在维持核细胞完整性的局部化和功能作用.
- 利用RNA-蛋白相互作用测试来确定结合伙伴.
- 在CUL1-IPA操纵后量化rRNA水平,蛋白质合成和细胞周期进展.
- 在癌症患者数据中分析了CUL1-IPA表达.
主要成果:
- CUL1-IPA转移到细胞核,对其完整性至关重要.
- 参与rRNA处理的GPATCH4和NOP58被确定为CUL1-IPA结合伙伴.
- CUL1-IPA的损失降低了rRNA水平,降低了蛋白质合成,并导致G2/M细胞周期停止.
- 重新引入CUL1-IPA恢复了rRNA水平.
- 减少CUL1-IPA表达与癌症患者的生存率改善相关.
结论:
- CUL1-IPA是一种功能性长非编码RNA (lncRNA),源自通过IPA编码的蛋白质编码基因.
- CUL1-IPA形成核细胞RNA-蛋白质复合体,对于rRNA处理和核细胞结构至关重要.
- 这种lncRNA在细胞平衡中起着重要作用,并对癌症患者的治疗结果产生影响.
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