发现了针对酵母U4/U6 snRNA中的5'茎环的小分子探针
Mo Yang1, Shaifaly Parmar1, Sumirtha Balaratnam1
1Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702-1201, USA.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
研究人员发现了新的小分子,它们与酵母的U4/U6小核RNA (snRNA) K-转区域结合. 这种基于结构的方法快速识别了连接体,其中一个模拟物抑制了RNA-蛋白相互作用,这对拼接体组装至关重要.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 药物发现 药物发现 药物发现
背景情况:
- 结合体是一个复杂的调节前mRNA结合的复杂体,是药物发现的关键目标.
- 小核RNAs (snRNAs) 对于结合体组装至关重要,它们调解RNA-RNA和RNA-蛋白相互作用.
研究的目的:
- 为了快速发现针对酵母U4/U6 snRNA K-转动动机的小分子配体.
- 用生物物理和生物化学方法验证和描述已识别的配体.
主要方法:
- 对多个RNA结构进行并行小分子微阵列 (SMM) 选.
- 生物物理分析 (例如,K_D确定,deltaSHAPE) 和分子动力学 (MD) 模拟.
- 生物化学测试以评估RNA-蛋白结合的抑制 (例如,U4-Snu13相互作用).
主要成果:
- 鉴定了酵母U4/U6 snRNA的小分子K-转变配体.
- 一种类型 (22) 显示了更好的结合亲和力 (K_D = 3.9 ± 2.2 μM) 和与K转区域的特定相互作用.
- 分子22抑制了U4 snRNA与Snu13的结合 (IC_50 = 3.2 ± 0.4 μM).
结论:
- 一种多重化,基于结构的方法可以快速识别特定RNA结构的配体.
- 鉴定到的小分子是结合体组合和功能的潜在调节器.
- 这一策略可用于发现其他复杂RNA标的配体.
相关概念视频
03:31Labeling DNA Probes
9.2K
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
9.2K
02:24Ribosome Profiling
4.0K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
4.0K