相关实验视频
Updated: Aug 12, 2026

11:48
Detection of Alternative Splicing During Epithelial-Mesenchymal Transition
Published on: October 9, 2014
概括
这项研究揭示了β-thalassaemia基因中的特定突变如何破坏基因转录和RNA拼接. 这些遗传缺陷导致转录水平降低和RNA异常,影响β-环球蛋白的产生.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 血液学 血液学 血液学
背景情况:
- β-血症是一组遗传性血液疾病,其特点是β-环球蛋白链的合成减少或不存在.
- 了解β-thalassaemia的分子基础对于开发有效的治疗策略至关重要.
研究的目的:
- 为了研究特定突变对β-thalassaemia基因的转录活性和RNA剪接的影响.
- 为了确定导致β-thalassaemia中基因表达改变的精确分子缺陷.
主要方法:
- 对五个克隆的β-thalassaemia基因进行了转录分析.
- 在培养的哺乳动物细胞中引入突变基因.
- 对转录水平和RNA拼接模式的评估.
主要成果:
- 一个促进子突变 (单基变化87bp上游的mRNA盖部位) 显著降低了转录水平.
- 第一个中间序列 (IVS1) 5'拼接位 (位置1,5和6) 的突变损害了拼接效率,并激活了密码拼接位.
- 位于745位的第二个中间序列 (IVS2) 的突变导致异常RNA与额外的外子.
结论:
- 在β-thalassaemia基因中的特定点突变可以直接损害转录启动和RNA剪接.
- 这些分子缺陷为beta-thalassaemia的发病过程提供了详细的了解.
- 这些发现强调了精确基因调节在正常β-环球蛋白合成中的关键作用.
相关概念视频
Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
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...
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...
General Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life

