在人类叶中,鉴定具有可变水平的翻译后修饰的蛋白质
Yu V Miroshnichenko1, A V Rybina1, V S Skvortsov1
1Institute of Biomedical Chemistry, Moscow, Russia.
Biomeditsinskaia khimiia
|November 10, 2025
概括
这项研究重新分析了蛋白质组数据,以发现患者蛋白质翻译后修饰 (PTM) 的差异. 确定了53种蛋白质的关键PTM变化,可能会影响神经系统疾病的发病.
科学领域:
- 神经科学是一个神经科学.
- 蛋白质组学是指蛋白质组学.
- 生物化学 生物化学
背景情况:
- 叶 (TLE) 是一种常见的神经疾病.
- 了解分子机制,特别是蛋白质的改变,对于TLE研究至关重要.
- 蛋白质后翻译性修饰 (PTMs) 是蛋白质功能的关键调节者.
研究的目的:
- 重新分析现有的蛋白质组数据,以确定硬化TLE患者,非硬化TLE患者和非患者对照之间的蛋白质PTM差异.
- 研究特定PTMs在和其他神经疾病的发病过程中的作用.
主要方法:
- 基于比较质谱的蛋白质组学.
- 对公开可用的蛋白质组数据进行重新分析 (PRIDE存储库,PXD064519).
- 识别和量化不同丰富的蛋白质的翻译后修饰 (酸化,甲基化,乙化,素化).
主要成果:
- 在53种蛋白质中发现了PTM水平的显著变化.
- 这些蛋白质涉及神经疾病过程和发.
- 与对照组相比,在患者样本中发现了特定的PTM变化.
结论:
- 该研究确定了特定的蛋白质PTM,在叶中显著改变.
- 这些改变的PTM可能在和其他神经系统疾病的发病过程中发挥关键作用.
- 这次重新分析为神经疾病的分子基础提供了新的见解.
相关概念视频
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
02:07Improving Translational Accuracy
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
01:31Translation
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
02:07Improving Translational Accuracy
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
01:31Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are called the...
Translation Produces the Building Blocks of Life
Proteins are called the...