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相关概念视频

Alternative RNA Splicing02:18

Alternative RNA Splicing

20.9K
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...
20.9K
RNA Splicing01:32

RNA Splicing

56.0K
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...
56.0K
Pre-mRNA Processing: RNA Splicing01:36

Pre-mRNA Processing: RNA Splicing

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5.2K
Chromatin Structure and RNA Splicing02:41

Chromatin Structure and RNA Splicing

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2.7K
Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

6.9K
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...
6.9K
pre-mRNA Processing02:01

pre-mRNA Processing

52.6K
In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a “cap” to the 5’ end of the growing transcript. In this process, a 5’ phosphate is replaced by modified guanosine that has a methyl group attached to it (7-Methyl...
52.6K

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相关实验视频

Updated: May 31, 2025

Identification of Alternative Splicing and Polyadenylation in RNA-seq Data
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Identification of Alternative Splicing and Polyadenylation in RNA-seq Data

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MCTASmRNA:一种用于替代拼接事件分类的深度学习框架.

Juan-Yu Zheng1, Gao Jiang1, Fu-Hai Gao1

  • 1School of Information Science and Technology, School of Artificial Intelligence, Beijing Forestry University, Beijing 100083, People's Republic of China.

International journal of biological macromolecules
|January 22, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的深度学习模型MCTASmRNA,以准确地分类mRNA中的替代拼接 (AS) 事件. 这种方法通过提高效率和跨物种通用性来增强AS研究,而不需要参考基因组.

关键词:
另一个替代拼接.深度学习是一种深度学习.变压器变压器变压器

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科学领域:

  • 基因组学和分子生物学
  • 生物信息学和计算生物学

背景情况:

  • 替代拼接 (AS) 是真核生物中一个关键的转录后基因调节机制.
  • 目前的AS检测方法往往是低效的,耗时的,并与RNA序列复杂性作斗争.

研究的目的:

  • 开发一种高效准确的模型,用于对mRNA序列中的替代拼接事件进行分类.
  • 克服现有的AS检测工具的局限性,特别是处理复杂的RNA序列和大数据集.

主要方法:

  • 评估了10个AS检测工具,为数据集构建选择了rMATS.
  • 为AS事件分类开发了一种多尺度卷积和基于变压器的模型 (MCTASmRNA).
  • 整合了一个高效的道注意力机制和一个新的关节损失函数用于模型优化.

主要成果:

  • 与基线模型相比,MCTASmRNA实现了更高的性能,显示了显著的准确性改进.
  • 该模型在不同物种中表现出增强的通用性,在没有参考基因组的情况下证明有效.
  • 在AS事件序列中成功解决了大类内部和小类间差异的挑战.

结论:

  • MCTASmRNA为替代拼接事件分类提供了一种强大而高效的方法.
  • 该模型为跨多种生物体的AS研究提供了宝贵的支持,增强了我们对基因调节的理解.
  • 未来的工作将集中在模型优化和扩展上,以更深入地探索AS机制.