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相关概念视频

RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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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...
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Types of RNA01:20

Types of RNA

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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
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Types of RNA01:23

Types of RNA

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Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

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The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
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mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

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神经元活动触发了RNA稳定性的广泛变化.

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    神经元活动通过控制RNA稳定性来调节基因表达,而不仅仅是转录. 这一由HuD蛋白调解的过程对大脑发育至关重要,并与自闭症谱系障碍 (ASD) 等神经发育障碍有关.

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    科学领域:

    • 神经科学是一个神经科学.
    • 分子生物学分子生物学
    • 遗传学 遗传学 是一个

    背景情况:

    • 已知神经元活动会影响大脑发育和突触可塑性的基因表达.
    • 虽然转录调节得到了很好的研究,但神经元活动对整个RNA生命周期的影响不太清楚.

    研究的目的:

    • 研究神经元活动对神经元RNA代谢的整体影响.
    • 确定活动依赖RNA调节的关键机制和调节者.
    • 探索这些机制在神经发育障碍中的作用.

    主要方法:

    • 在体外和体内实验研究RNA代谢的实验.
    • 分析3'UTRmRNA基因和机器学习以识别RNA结合蛋白.
    • 研究HuD蛋白在活动依赖mRNA稳定中的作用.
    • 研究与自闭症谱系障碍 (ASD) 相关的变体.

    主要成果:

    • 神经元活动影响RNA代谢的多个阶段,RNA稳定性是约15%活动依赖基因的重要调节者.
    • 确定了特定的3'UTRmRNA动机,可以调节活动依赖的mRNA稳定性.
    • 确定了RNA结合蛋白HuD作为一个关键调节器,稳定了数百个转录以响应神经元活动.
    • 神经元活动重组HuD相互作用蛋白质,影响mRNA稳定性和翻译.
    • 活动依赖的mRNA稳定性的破坏与与ASD和其他神经发育障碍相关的变异有关.

    结论:

    • RNA稳定性是神经元中刺激反应基因调节的关键,低估的机制.
    • HuD在调解活动依赖的mRNA稳定性方面发挥着核心作用.
    • 异常的mRNA稳定机制可能有助于神经发育障碍的病理生理学.