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相关概念视频

Alternative RNA Splicing02:18

Alternative RNA Splicing

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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...
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Gene Duplication and Divergence02:37

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The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
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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...
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Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
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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. 
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Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
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在印度尼西亚群岛上对基因驱动的替代拼接进行分析.

Neke Ibeh1, Pradiptajati Kusuma2, Chelzie Crenna Darusallam2

  • 1School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia; Melbourne Integrative Genomics, University of Melbourne, Parkville, VIC 3010, Australia; Bioinformatics and Cellular Genomics, St Vincents Institute of Medical Research, Fitzroy, VIC 3065, Australia; Human Genomics and Evolution, St Vincent's Institute of Medical Research, Fitzroy, VIC 3065, Australia.

American journal of human genetics
|October 9, 2024
PubMed
概括

这项研究揭示了遗传变异如何影响印尼人群的替代拼接 (AS),确定了超过6,000个拼接定量特征位点 (sQTLs),影响基因调节,特别是在免疫基因中.

关键词:
印度尼西亚 印度尼西亚 印度尼西亚岛屿 东南亚 东南亚巴布亚语的巴布亚语是什么意思在RNA-seqqq.替代性拼接是一种替代性的拼接.人类的多样性人类的多样性.sQTLTL 是一个很好的方法.转录组学 转录组学是指转录组学.

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科学领域:

  • 基因组学就是基因组学.
  • 分子生物学分子生物学
  • 人口遗传学 人口遗传学

背景情况:

  • 替代拼接 (AS) 是一个关键的基因调节机制,影响人类生物学,疾病和免疫力.
  • 了解不同人群中的AS变异及其遗传基础至关重要,但仍然有限.
  • 岛屿东南亚为研究人类人口多样性和基因调节提供了一个独特的遗传景观.

研究的目的:

  • 调查印度尼西亚三个岛屿人口的替代拼接 (AS) 景观.
  • 识别与拼接变化相关的遗传变异 (拼接定量特征位置[sQTLs]).
  • 探索已识别的sQTLs对基因调节,特别是免疫基因的功能后果.

主要方法:

  • 对来自三个岛屿群体的115个印尼样本的替代拼接事件的分析.
  • 利用基于事件的统计模型来检测差异性AS.
  • 确定了拼接定量特征位点 (sQTLs),并预测了它们对RNA结合活性的影响.

主要成果:

  • 在岛际比较中检测到超过1500个显著差异性AS事件.
  • 鉴定了超过6000种与拼接变化 (sQTLs) 相关的遗传变异,其中一些与巴布亚类祖先有关.
  • 发现与现有sQTL数据集的部分重叠,并确定了可能调节免疫基因拼接的sQTL.

结论:

  • 遗传变异在不同的人群中显著塑造了替代拼接模式.
  • 在印尼人中确定了新的sQTL,突出了研究代表性不足的人口的重要性.
  • 研究结果提供了对免疫基因调节中遗传变异在高度多样化的区域中的作用的见解.