U2AF2以RS域依赖的方式控制了斑点近端区域的替代拼接
Serhii Pankivskyi1, Asaki Kobayashi1, Jean de Matha Salone1
1Université Paris-Saclay, INSERM U1204, Univ Evry Paris-Saclay, Structure-Activité des Biomolécules Normales et Pathologiques (SABNP), Evry-Courcouronnes, 91025, France.
Nucleic acids research
|February 28, 2026
概括
拼接因子U2AF2 (U2辅助因子2) 对于RNA拼接至关重要. 它的RS域调节了相互作用和影响在核斑点附近的拼接,突出了基因表达中的空间控制.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 生物化学 生物化学
背景情况:
- 在spliceosome组装过程中,U2AF2对于3'拼接部位的识别至关重要.
- 核斑点是参与拼接因子存储和功能的动态结构.
研究的目的:
- 为了确定新的U2AF2功能合作伙伴.
- 研究U2AF2 RS域在蛋白质相互作用和拼接调节中的作用.
- 探索U2AF2度和定位对核斑点附近的替代拼接的影响.
主要方法:
- 近距离标签技术的使用.
- 生物化学测定 生物化学测定
- 全基因组拼接分析.
- 生物信息学分析
- 在U2AF2敲除和RS域删除实验中进行了U2AF2敲除和RS域删除实验.
主要成果:
- 确定了新的U2AF2合作伙伴,参与拼接,染色质修饰,转录,3'端处理和RNA甲基化.
- 删除RS域改变了U2AF2相互作用,减少了核斑点定位,并影响了全基因组拼接.
- 卡塞特外子与斑点附近的短内子的结合对U2AF2变化最敏感.
- 在RS域中的酸化位点对于U2AF2功能和拼接调节至关重要.
- 靠近斑点的替代拼接受U2AF2的局部度的影响,这可能是限制性的.
结论:
- U2AF2 RS域是蛋白质相互作用和拼接的关键调节枢纽.
- 在核斑点附近U2AF2的空间可用性是调节替代拼接的关键因素.
- 这项研究为蛋白质定位,度和基因表达调节之间的相互作用提供了新的见解.
相关概念视频
02:18Alternative RNA Splicing
25.4K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
25.4K
02:18Alternative RNA Splicing
5.3K
5.3K
01:32RNA Splicing
61.0K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
61.0K
01:36Pre-mRNA Processing: RNA Splicing
7.2K
7.2K
02:41Chromatin Structure Regulates pre-mRNA Processing
8.3K
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
The chromatin structure, especially...
8.3K
02:28Leaky Scanning
5.8K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.8K