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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...
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...
Pre-mRNA Processing: RNA Splicing01:32

Pre-mRNA Processing: 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...
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...
Transposons01:24

Transposons

Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...

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相关实验视频

Updated: Jul 13, 2026

Examination of the Telomere G-overhang Structure in Trypanosoma brucei
15:25

Examination of the Telomere G-overhang Structure in Trypanosoma brucei

Published on: January 26, 2011

有证据表明,在三子体中发生了转接剪接.

R E Sutton, J C Boothroyd

    Cell
    |November 21, 1986
    PubMed
    概括

    试酶信使RNAs (mRNAs) 是通过转接拼接合成的. 一个小RNA分子 (medRNA) 提供了5'小外显子,它被拼接到蛋白质编码外显子,产生成熟的mRNA和自由的minRNA产物.

    科学领域:

    • 分子生物学分子生物学
    • 寄生虫学的寄生虫学
    • 在RNA生物学,RNA生物学.

    背景情况:

    • 试组mRNAs具有保留的5'迷你外显子序列.
    • 这种微型外显子与主要的蛋白质编码外显子分开转录.

    研究的目的:

    • 为了研究三子体中mRNA合成的机制.
    • 为了测试对mRNA成熟的转链剪接的假设.

    主要方法:

    • 试组RNA的分析,以检测minRNA的存在.
    • 在实验室中使用HeLa细胞提取物进行脱枝测试.

    主要成果:

    • 在试组RNA制剂中检测到大量的自由小RNA.
    • minRNA可以通过脱枝酶从较大的RNA结构中释放出来.

    结论:

    • 转链拼接是产生在试子体中成熟的mRNA的生理机制.
    • 这个过程涉及从medRNA连接一个迷你外因子到编码蛋白质的外因子.

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    Dissection of Drosophila melanogaster Flight Muscles for Omics Approaches

    Published on: October 17, 2019

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    Last Updated: Jul 13, 2026

    Examination of the Telomere G-overhang Structure in Trypanosoma brucei
    15:25

    Examination of the Telomere G-overhang Structure in Trypanosoma brucei

    Published on: January 26, 2011

    High-throughput Gene Tagging in Trypanosoma brucei
    11:26

    High-throughput Gene Tagging in Trypanosoma brucei

    Published on: August 12, 2016

    Dissection of Drosophila melanogaster Flight Muscles for Omics Approaches
    08:33

    Dissection of Drosophila melanogaster Flight Muscles for Omics Approaches

    Published on: October 17, 2019