相关实验视频
Updated: Sep 16, 2025

08:53
A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
Published on: September 15, 2021
2.9K
串联接受体位点:分析它们对人类疾病的相关性
Frederick G Frost1, Shaopeng Gu2, Adrienne Elbert3
1National Institutes of Health Undiagnosed Diseases Program, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD.
概括
改变结合受体位点 (NAGNnAG) 的遗传变异具有临床相关性,但难以解释. 经验性RNA分析改善了对基因组医学中的这些拼接受体位点变异的理解.
科学领域:
- 基因组医学是基因组医学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 解释创造或破坏协同拼接受体位点的遗传变异 (NAGNnAG变异) 在基因组医学中构成重大挑战.
- 准确地解释这些结合部位变异对于诊断遗传疾病和实施有效的基因组医学实践至关重要.
研究的目的:
- 分析在天然拼接受体位点附近的二核酸AG位点的产生和破坏.
- 将临床数据库 (ClinVar,gnomAD) 和患者研究中的变异数据进行比较,以了解NAGNnAG变异的临床相关性.
- 评估RNA测序和SpliceAI预测在评估这些变异的功能影响中的实用性.
主要方法:
- 在GRCh37人类基因组中,在接受体位点的±30个基点内分析NAGNnAG变异.
- 来自ClinVar,gnomAD和779个未诊断疾病计划参与者的变体数据的比较.
- 与SpliceAI预测相比,RNA测序评估了107名参与者的NAGNnAG变体的拼接.
主要成果:
- 与gnomAD相比,NAGNnAG变体靠近拼接受体在ClinVar中富含,表明潜在的临床意义.
- 拼接AI得分显示,在数据库之间区分这些变异的临床相关性的能力有限.
- RNA测序证实了新型拼接受体部位的使用,并表明改变拼接的变体并不局限于特定区域或由SpliceAI一致预测,这表明拼接性增加.
结论:
- 在自然拼接受体的30个基对内的NAGNnAG变异具有很高的临床相关性.
- 当前的计算工具为这些变体的临床实用性提供了有限的背景化.
- 通过RNA分析进行经验评估对于在临床实践中准确解释NAGNnAG变体至关重要.
相关概念视频
Alternative RNA Splicing
21.7K
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...
21.7K
RNA Splicing
57.1K
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...
57.1K
Translation
15.6K
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
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
15.6K
Genome-wide Association Studies-GWAS
14.4K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
14.4K
Exon Recombination
3.7K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.7K
Mismatch Repair
5.2K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
5.2K

