两个相邻的MyoD1结合部位调节了乙胆受体α子单元基因的表达
J Piette1, J L Bessereau, M Huchet
1UA Centre National de la Recherche Scientifique D1284, Département des Biotechnologies, Institut Pasteur, Paris, France.
Nature
|May 24, 1990
概括
MyoD1蛋白与类乙胆受体α子单元基因增强剂中的特定部位结合,激活肌肉特异性基因表达. 这一发现澄清了MyoD1在调节肌肉发育过程中的乙胆受体基因中的作用.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 肌源性调节因子 (MRF) 是控制肌肉细胞分化的关键转录因子.
- MyoD1是一种具有良好的特征的MRF,可激活肌肉特异性基因表达.
- 乙胆受体 (AChR) 基因的调节,特别是它们的α子单元,对于神经肌肉结的形成至关重要.
研究的目的:
- 调查MyoD1结合部位在ACHRα子单元基因调节中的作用.
- 为了确定MyoD1是否直接影响ACHRα子单元基因增强者的活性.
主要方法:
- 识别和表征MyoD1结合部位在肉ACHRα子单元基因的肌肉特异增强剂内.
- 使用肌管中转染试验进行功能分析,以评估增强剂活性.
主要成果:
- 在肉的ACHRααα子单元基因增强剂中发现了两个功能性的MyoD1结合位点.
- 发现这些结合部位对于增强剂在转染的髓管中充分活性至关重要.
- 证明MyoD1直接对ACHRααα子单元基因的转录调节作出贡献.
结论:
- MyoD1在通过其增强剂中的特定结合点来调节ACHRα子单元基因表达方面发挥着直接作用.
- 这些发现为控制肌肉发育过程中乙胆受体基因表达的分子机制提供了新的见解.
- 有助于理解MRFs对肌肉特异性基因的协调调节.
相关概念视频
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...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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...
Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...


