不结构蛋白的严格调节:从转录合成到蛋白质降解
Jörg Gsponer1, Matthias E Futschik, Sarah A Teichmann
1Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK. jgsponer@mrc-lmb.cam.ac.uk
概括
细胞通过转录清除,降解和翻译精确地控制内在非结构化蛋白质 (IUP). 这种调节确保了适当的细胞信号传递,并防止了癌症等病理状况.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 内在非结构化蛋白 (IUP) 的丰度变化与细胞信号干扰有关.
- 这些干扰可以导致病理状况,包括癌症.
研究的目的:
- 研究细胞调节IUP可用性的机制.
- 了解IUP的精确控制如何影响细胞信号传递并预防疾病.
主要方法:
- 对转录清除率的分析.
- 评估蛋白质分解性降解途径.
- 对IUP的转换率的测量.
- 蛋白质酸化水平的量化.
主要成果:
- 转录清除,蛋白质分解降解和转化率被确定为IUP丰富性的关键监管机制.
- 一些IUP存在的数量很少,持续时间很短,表明微调.
- 高水平的酸化和转录和翻译的低随机性支持精确的IUP可用性控制.
结论:
- 细胞机制精细调整了内在非结构化的蛋白质的可用性.
- 对IUP的精确监管对于保持信号保真至关重要.
- 适当控制输卵管对于预防细胞功能障碍和癌症等病理状况至关重要.
相关概念视频
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Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
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Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
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
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Regulated Protein Degradation
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...


