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相关概念视频

RNA-seq03:21

RNA-seq

11.7K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
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Ribosome Profiling02:24

Ribosome Profiling

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Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
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Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
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CRYPTID-exon:从RNA-seq数据中简化检测神秘的外子.

Eraj S Khokhar1, Kaitlyn Brokaw1, Zachary J Kartje1

  • 1RNA Therapeutics Institute, University of Massachusetts Chan Medical School, Worcester, MA.

bioRxiv : the preprint server for biology
|December 25, 2025
PubMed
概括

研究人员开发了CRYPTID-exon,这是一个计算工具,用于识别基因表达中的神秘外因子. 这种方法有助于理解神秘的外电子功能及其在疾病中的潜在治疗应用.

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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
  • 生物信息学是一种生物信息学.

背景情况:

  • 隐秘拼接是哺乳动物基因表达的一个常见但不太了解的方面.
  • 鉴定功能密码外型是具有挑战性的,因为难以确定确切的mRNA序列.

研究的目的:

  • 介绍CRYPTID-exon,这是一种用于准确预测密码外子边界的新型计算方法.
  • 描述人体细胞中的神秘外子,并评估它们在基因表达调节中的作用.
  • 探索针对疾病相关基因中的神秘外基因的治疗潜力.

主要方法:

  • 开发CRYPTID-exon,一种计算方法,模拟RNA-seq在拼接部位周围的读取覆盖范围.
  • 应用CRYPTID-exon来识别和描述人类RNA中数千个神秘的外型子.
  • 验证CRYPTID-exon检测敏感于转化媒介降解的外因子的能力.

主要成果:

  • 数以千计的以前未被注释的密码外型被识别并对人类细胞进行了表征.
  • CRYPTID-exon成功识别了受翻译介导降解影响的外显子.
  • 用反感性寡核化物 (ASO) 准已识别的神秘外显子,证明了基因表达和拼接的调制.

结论:

  • CRYPTID-exon提供了一个强大的框架,用于系统地识别和表征加密的exons.
  • 这种方法有助于理解密码外子对mRNA稳定性和翻译的影响.
  • 准隐秘的外因子为调节疾病环境中的基因表达提供了潜在的策略.