相关实验视频

Updated: Jun 3, 2025

RNA Isolation from Embryonic Zebrafish and cDNA Synthesis for Gene Expression Analysis

RNA Isolation from Embryonic Zebrafish and cDNA Synthesis for Gene Expression Analysis

Published on: August 7, 2009

在海星胚胎中尿基化mRNA的循环利用

Haruka Yamazaki¹, Megumi Furuichi¹, Mikoto Katagiri¹

¹Department of Biological Sciences, Ochanomizu University, Bunkyo-ku, Tokyo 112-8610, Japan.

|January 8, 2025

概括

海星中的尿化mRNA可以在被禁用后重新激活用于翻译. 这项研究揭示了urinidylatedmRNAs的平衡状态,允许回收或降解.

科学领域:

分子生物学分子生物学
发展生物学发展生物学
在RNA生物学,RNA生物学.

背景情况:

在真核生物中,mRNA多A) 尾长调节翻译和降解.
死亡和尿通常会导致mRNA衰变.
不立即降解的尿基化mRNA的命运在很大程度上是未知的.

研究的目的:

为了研究海星中mRNAs的死化/尿化后命运.
为了确定尿化mRNA是否可以恢复翻译活性.
了解早期发育期间母亲mRNA的调节机制.

主要方法:

尾部测序 (tail-seq) 用于分析多个类型的尾部动力学.
微注射mRNA 3'区域以研究调节元素.
在海星发育过程中观察母亲的mRNA行为 (cyclin B,Rps29,Rpl27a).

主要成果:

海星mRNAs可以重新多基化,并在死基化和尿基化后变得翻译活跃.
尿基化母性环林B mRNA在卵细胞中稳定,在激素刺激后重新聚氨基化.
尿基化核糖体蛋白mRNAs (Rps29,Rpl27a) 是不活跃的,但可以在分子阶段重新聚氨基化.

结论:

海星中的尿化mRNA存在于平衡状态,不一定是为了立即降解.
这种平衡状态允许选择性回收或特定的母体mRNAs的衰变.
mRNA多化和尿化动态在发育过程中调节基因表达起着至关重要的作用.

关键词:

已经死亡的enylation.mRNA降解降解的过程聚乙烯 (Poly) 是一种聚乙烯 (Poly) 化合物.核糖体蛋白的mRNAs是什么海星是什么意思海星是什么意思尿化尿化

更多相关视频

High Throughput Microinjections of Sea Urchin Zygotes

High Throughput Microinjections of Sea Urchin Zygotes

Published on: January 21, 2014

Extremely Rapid and Specific Metabolic Labelling of RNA In Vivo with 4-Thiouracil Ers4tU

Extremely Rapid and Specific Metabolic Labelling of RNA In Vivo with 4-Thiouracil Ers4tU

Published on: August 22, 2019

相关概念视频

mRNA Stability and Gene Expression

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability

RNA Editing

RNA Editing

RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...

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...