相关实验视频

Updated: Jun 23, 2025

An In Vitro Assay to Detect tRNA-Isopentenyl Transferase Activity

An In Vitro Assay to Detect tRNA-Isopentenyl Transferase Activity

Published on: October 8, 2018

RNA修饰酶塑造tRNA生物发生和功能

Sarah K Schultz¹, Ute Kothe¹

¹Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada; Alberta RNA Research and Training Institute (ARRTI), Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, Alberta, Canada.

The Journal of biological chemistry

|June 22, 2024

概括

转移RNAs (tRNAs) 被广泛修改,各种化学修改影响其功能. 这篇评论探讨了tRNA修饰酶的研究.

科学领域:

分子生物学分子生物学
在RNA生物学,RNA生物学.
生物化学生物化学

背景情况:

转移RNA (tRNA) 是最广泛修饰的细胞RNA之一.
tRNA的修改发生在不同的集群中,特别是在反子茎循环和tRNA肘部.
许多tRNA修饰的功能意义,特别是在肘部区域,仍然不完全理解.

研究的目的:

在整个tRNA生命周期中审查tRNA修饰酶的已知功能.
阐明tRNA修饰和酶介导折叠如何影响tRNA成熟和功能.
要突出tRNA修饰,蛋白质合成,细胞表型和疾病之间的联系.

主要方法:

对tRNA修饰和tRNA修饰酶研究的文献综述.
对保存的tRNA修改及其拟议作用的分析.
整合关于tRNA修饰酶在修饰和伴侣活动中的双重作用的发现.

主要成果:

对于蛋白质翻译来说,tRNA的修改至关重要,特别是那些在Anticodon茎循环中的蛋白质.
虽然tRNA肘部修改通常不是生长必不可少的,但它们的保存程度很高,它们的功能正在出现.
许多tRNA修饰酶也可以作为伴侣,帮助tRNA折叠和成熟.

结论:

修改tRNA的酶对于tRNA成熟,氨基化和蛋白质合成至关重要.
这些修饰和酶活性影响细胞表型,并与疾病有关.
对tRNA修饰功能的进一步研究对于理解基本的生物过程和疾病机制至关重要.

关键词:

这是一个RNARNARNARNARNA.这是一种RNA结合蛋白.在RNA折叠过程中.通过RNA甲基化.基因组RNA的修饰是RNA的修饰.处理RNA处理RNA的过程结构 RNA 结构 RNA 结构的氨基酸tRNA合成酶.前体tRNA (pre-tRNA) 是一个前体tRNA.蛋白质合成蛋白质合成核糖体的核糖体是指核糖体中的核糖体.转移RNA (tRNA) 是一种

更多相关视频

Characterizing RNA Modifications in Single Neurons Using Mass Spectrometry

Characterizing RNA Modifications in Single Neurons Using Mass Spectrometry

Published on: April 21, 2022

Simultaneous Mapping and Quantitation of Ribonucleotides in Human Mitochondrial DNA

Simultaneous Mapping and Quantitation of Ribonucleotides in Human Mitochondrial DNA

Published on: November 14, 2017

相关概念视频

Transfer RNA Synthesis

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...

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...

tRNA Activation

tRNA Activation

Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...

RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...

Nuclear Export of mRNA

Nuclear Export of mRNA

Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...

Types of RNA

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...