DNA结合点序列指导葡萄糖皮质体受体的结构和活性
Sebastiaan H Meijsing1, Miles A Pufall, Alex Y So
1Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA 94158, USA.
概括
基因表达是由诸如葡萄糖皮质体受体 (GR) 等因素精确控制的. 结合DNA序列微调GR活性,作为特定序列的配体来调节目标基因.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 基因表达需要精确的调制,而不仅仅是开启/关闭.
- 葡萄糖皮质体受体 (GR) 结合特定的DNA序列来调节目标基因.
- 这些DNA结合点传统上被认为是简单的对接点.
研究的目的:
- 研究DNA序列变异如何影响葡萄糖皮质体受体 (GR) 构造和功能.
- 了解GR基因表达调节的精确机制.
主要方法:
- 结构性分析是指结构性分析.
- 生物化学测定 生物化学测定
- 基于细胞的测定.
主要成果:
- 在DNA结合序列 (即使是单个基对) 中微妙的差异也会改变GR构造.
- 这些序列变化导致GR的不同调节活性.
- 已经证明,GR结合序列直接影响受体构造和功能.
结论:
- DNA 作为葡萄糖皮质体受体 (GR) 的序列特异性全联体.
- 这种全质调节使GR能够针对特定的基因定制其活性.
- 基因序列本身在调节基因表达方面起着积极的作用.
相关概念视频
Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form dimers that...
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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...
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...


