类固醇受体联合激活剂-1 是一种基因素乙转移酶
T E Spencer1, G Jenster, M M Burcin
1Department of Cell Biology, Baylor College of Medicine, Houston, Texas 77030, USA.
Nature
|September 20, 1997
概括
类固醇受体联合激活剂SRC-1具有基因酸转移酶活性,有助于基因转录. 这种活动与PCAF一起,有助于克服染色质抑制,使基因激活.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 基因规则 基因规则
背景情况:
- 类固醇受体和联合激活剂通常通过形成转录复合体来增强基因表达.
- 获得抑制的染色质仍然是理解基因活化中的关键问题.
- 已知 histone 乙转移酶 (HAT) 能够抵消染色体对转录的抑制作用.
研究的目的:
- 调查类固醇受体协活性剂SRC-1在染色质调节中的作用.
- 为了确定SRC-1是否具有内在的氨酸转移酶 (HAT) 活性.
- 为了探索SRC-1,PCAF和基因转录中的基因乙化之间的相互作用.
主要方法:
- 生物化学试验以评估SRC-1的HAT活性.
- 蛋白相互作用研究,以检查SRC-1和PCAF结合.
- 对特定基因促进体上的组素乙化模式的分析.
主要成果:
- SRC-1表现出内在的HAT活性,主要向H3和H4基因组.
- SRC-1 与另一种HAT,p300/CBP相关因子 (PCAF) 相互作用.
- 与类固醇受体结合的联体可能会触发SRC-1和PCAF介导的基因素乙化.
结论:
- 在克服染色体抑制方面,SRC-1的HAT活性至关重要.
- SRC-1和PCAF的协调作用有助于转录因子进入抑制的染色质.
- 这种机制增强了类固醇受体介导的基因激活,并增加了特定的基因转录.
相关概念视频
Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
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Acetylation
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Co-activators and Co-repressors
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Eukaryotic Transcription Activators
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Covalently Linked Protein Regulators
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These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
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...
Histone Modification
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone deacetylase,...


