多域形态选择是U2AF的mRNA前拼接调节的基础
Cameron D Mackereth1, Tobias Madl, Sophie Bonnal
1Institute of Structural Biology, Helmholtz Zentrum München, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany.
Nature
|July 15, 2011
概括
人类U2辅助因子65 (U2AF65) 蛋白质使用两种不同的构造来结合RNA,作为分子静止剂. 这种形状选择机制通过控制U2 snRNP招募来调节mRNA前拼接效率.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 多域蛋白对细胞功能至关重要,通过它们的独立模块识别特定的连接体.
- 了解多个域在连接体识别过程中如何动态相互作用是必不可少的.
- 该U2辅助因子65 (U2AF65) 蛋白质通过识别聚皮里米丁通道RNA,在mRNA前拼接中发挥关键作用.
研究的目的:
- 阐明U2AF65识别3'-splice-site-associated polypyrimidine通道RNA的分子机制. 为了阐明U2AF65识别3'-splice-site-associated polypyrimidine通道RNA的分子机制.
- 研究U2AF65的域动态在mRNA前拼接调节中的作用.
主要方法:
- 研究了通过U2AF65.65对聚胺系RNA识别的分子机制.
- 利用结构和功能测试来描述U2AF65构造和RNA结合.
- 研究了突变对形状平衡和拼接活动的影响.
主要成果:
- U2AF65的协同RNA识别动机域采用基于聚皮里米丁通道亲缘关系的截然不同的闭合和开放形状.
- RNA序列的变化导致了这些构造之间的人口转移.
- 构造平衡作为分子静态,将RNA特征与U2 snRNP招募效率相关联.
结论:
- U2AF65采用一种对退化的RNA基因识别的形状选择机制.
- 这种机制从数量上将聚皮里米丁通道的特征与结合体组装效率联系起来.
- 合作的多域形状选择可能是分子识别的一般原则.
相关概念视频
RNA Splicing
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...
RNA Splicing
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...
Chromatin Structure Regulates pre-mRNA Processing
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...
Alternative RNA Splicing
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...
Pre-mRNA Processing: RNA Splicing
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...
Alternative RNA Splicing
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...


