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相关概念视频

pre-mRNA Processing02:01

pre-mRNA Processing

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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...
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相关实验视频

Updated: Jul 28, 2025

A Procedure for Implanting Organized Arrays of Microwires for Single-unit Recordings in Awake, Behaving Animals
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通过动物微处理器进行非正规加工.

Thuy Linh Nguyen1, Trung Duc Nguyen1, Minh Khoa Ngo1

  • 1Division of Life Science, The Hong Kong University of Science & Technology, Hong Kong, China.

Molecular cell
|June 2, 2023
PubMed
概括
此摘要是机器生成的。

研究人员发现了微处理器 (MP) 处理微RNA (miRNA) 转录的新方法. 这种非正典机制使用了新的DROSHA dsRNA识别位点 (DRES) 并扩大了对miRNA生物发生的理解.

关键词:
这里是C. elegans.总局CR8 总局CR8 总局穿着很漂亮的衣服,可以穿得很好.德罗莎 (Drosha) 是一个名为德罗莎 (Drosha) 的语言.在DROSHA的识别站点.微处理器微处理器准则的primiRNA处理.这就是miRNAs.非正规的primiRNA处理它们是primiRNAs.

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A Fully Automated and Highly Versatile System for Testing Multi-cognitive Functions and Recording Neuronal Activities in Rodents
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Using a Microfluidics Device for Mechanical Stimulation and High Resolution Imaging of C. elegans
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Using a Microfluidics Device for Mechanical Stimulation and High Resolution Imaging of C. elegans
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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 生物化学 生化学

背景情况:

  • 微处理器 (MP),包括DROSHA-DGCR8,对于通过处理primi-miRNAs来启动miRNA生物发生至关重要.
  • 已确定的MP的正规裂解机制已经研究了20年.
  • 然而,这种正规途径无法解释动物中所有primiRNA的处理.

研究的目的:

  • 发现和描述MP处理primiRNA的替代机制.
  • 研究新型RNA-蛋白相互作用在miRNA生物发生中的作用.
  • 确定替代的MP分离路径的进化保护和功能意义.

主要方法:

  • 在大约26万个序列上进行了高通量pri-miRNA切割试验.
  • 对正规与非正规的切割要求进行比较分析.
  • 在体中识别和验证DROSHA dsRNA识别位点 (DRES).

主要成果:

  • 一个新的,非正规的MP分离机制被确定和描述.
  • 这种非正规的途径不需要正规机制的关键元素.
  • 它依赖于以前未被识别的DROSHA dsRNA识别站点 (DRES).
  • 非正典机制在动物物种中得到保护,特别重要的是C. elegans.

结论:

  • 非正规的MP分离机制解释了通过正规途径错过的primi-miRNA基质的处理.
  • 这一发现扩大了动物MP的已知基质范围.
  • 这表明miRNA生物发生的扩大调节网络.