替代拼接与可变表达基因子集中的基因表达相结合
Guy Karlebach1, Robin Steinhaus2,3, Daniel Danis1
1The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA.
bioRxiv : the preprint server for biology
|July 3, 2023
概括
基因表达水平直接影响人类的替代拼接. 这种共同转录调节会影响成千上万的外体,影响基因功能和潜在的细胞分裂.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 替代拼接是扩展人类蛋白质组的关键机制.
- 基因表达水平和替代拼接模式之间的关系仍然不完全理解.
- 同转录调节是替代拼接的一个已知的因素.
研究的目的:
- 研究人类基因中的基因表达水平和替代拼接模式之间的关联.
- 识别特定的外显子和基因,其中表达和拼接是合的.
- 探索这些结合的外基因的特征和潜在的调节作用.
主要方法:
- 利用了基因型-组织表达 (GTEx) 项目的数据.
- 在10个人类组织中分析了基因表达和替代拼接之间的关联,超过141,000个异构体.
- 检查了序列特征,RNA聚合酶II结合,以及关联的外显子的转录率.
主要成果:
- 在13.3%的基因具有可变表达的分析外型的4.9%的显著表达-拼接关联被确定.
- 观察到,大约一半的合外显子表现出更高基因表达的增加包容性,而另一半的包容性下降.
- 这些表达-拼接合模式在不同组织和外部数据集中显示出高一致性.
- 发现结合的外子具有不同的序列特征,动机,并与RNA聚合酶II结合和内核转录率有关.
- 在这些外基因中发现了异形特异性基因本体学注释的丰富.
结论:
- 这项研究揭示了一种广泛的调节机制,将人类的基因表达与替代拼接结合起来.
- 这种影响众多外原体和基因的机制,为基因调节网络提供了洞察力.
- 这些发现表明,在细胞分裂等过程中,更高的包容性外因子可能发挥作用.
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