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Updated: May 4, 2026

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在试验室中对mRNA前体进行转剪接

M M Konarska, R A Padgett, P A Sharp

|August 1, 1985

概括

转接拼接从单独的分子连接RNA外片段. 二级结构和互补RNAs影响拼接效率和拼接部位选择,可能会将外子分发到多个mRNA中.

科学领域:

分子生物学分子生物学
在RNA生物学,RNA生物学.
遗传学是一个遗传学.

背景情况:

跨拼接是不同RNA分子的外子被连接在一起的过程.
了解转链剪接的调节对于基因表达研究至关重要.

研究的目的:

调查影响转链剪接效率的因素.
探索二次结构和互补性在翻译法规中的作用.

主要方法:

混合含有外子和内子序列的RNA分子,用于转接拼接反应.
观察RNA末端之间有或没有互补序列的转链剪接效率.

主要成果:

当两个RNA的中间序列形成双重复合时,转链剪接效率会增加.
即使没有显著的互补性,也发生了转接,表明了替代机制.
在中间序列中的二次结构可以影响侧边的外子拼接.

结论:

RNA二次结构和补充序列可以调节跨拼接效率和拼接位点选择.
转链拼接可以作为一种机制,在某些生物体中将单独的外子分发给各种信使RNA.

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相关概念视频

pre-mRNA Processing

pre-mRNA Processing

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...