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相关概念视频

RNA Splicing01:32

RNA Splicing

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...
RNA Splicing01:32

RNA Splicing

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...
Transfer RNA Synthesis02:36

Transfer RNA Synthesis

One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Alternative RNA Splicing02:18

Alternative RNA Splicing

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...
Alternative RNA Splicing02:18

Alternative RNA Splicing

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...
Transfer RNA Synthesis02:36

Transfer RNA Synthesis

One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...

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相关实验视频

Updated: May 10, 2026

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
11:34

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

Published on: August 9, 2019

U1 snRNA重新编写了"脚本".

Evan C Merkhofer, Tracy L Johnson

    Cell
    |July 10, 2012
    PubMed
    概括
    此摘要是机器生成的。

    一个拼接因子通过影响多基化机制来控制信使RNA (mRNA) 的长度. 这一发现对于理解活跃的大脑和免疫细胞中的基因表达至关重要.

    更多相关视频

    Analysis of Spliceosomal snRNA Localization in Human Hela Cells Using Microinjection
    07:35

    Analysis of Spliceosomal snRNA Localization in Human Hela Cells Using Microinjection

    Published on: August 6, 2019

    A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
    08:53

    A Reporter Based Cellular Assay for Monitoring Splicing Efficiency

    Published on: September 15, 2021

    相关实验视频

    Last Updated: May 10, 2026

    Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
    11:34

    Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

    Published on: August 9, 2019

    Analysis of Spliceosomal snRNA Localization in Human Hela Cells Using Microinjection
    07:35

    Analysis of Spliceosomal snRNA Localization in Human Hela Cells Using Microinjection

    Published on: August 6, 2019

    A Reporter Based Cellular Assay for Monitoring Splicing Efficiency
    08:53

    A Reporter Based Cellular Assay for Monitoring Splicing Efficiency

    Published on: September 15, 2021

    科学领域:

    • 分子生物学分子生物学
    • 基因表达规范 基因表达规范
    • 处理RNA处理RNA处理

    背景情况:

    • 细胞信使RNA (mRNA) 的表达依赖于许多RNA处理因子.
    • 精确调节mRNA长度对于细胞功能和基因表达至关重要.
    • 神经元和免疫细胞表现出复杂的基因表达模式,特别是在激活时.

    研究的目的:

    • 为了研究前mRNA拼接因子和多基化机制之间的相互作用.
    • 了解mRNA长度调节如何影响特定细胞类型的基因表达.

    主要方法:

    • 研究了一种特定的mRNA前拼接因子的功能.
    • 分析了它对多基解复合体和mRNA处理的影响.
    • 检查了激活的神经元和免疫细胞中的影响.

    主要成果:

    • 证明了前mRNA剪接因子直接调节了多基化机制的活动.
    • 显示这种调制导致调节mRNA长度.
    • 在激活的神经元和免疫细胞中观察到异型表达的显著影响.

    结论:

    • 前mRNA拼接因子在拼接之外发挥着调节作用,影响mRNA处理.
    • 这种机制提供了对基因表达的精确控制的见解,特别是在动态细胞状态下.
    • 这些发现凸显了mRNA长度调节在神经元和免疫环境中对细胞功能的重要性.