合成转录延长因子通过压抑色素许可转录
Graham S Erwin1, Matthew P Grieshop1, Asfa Ali1
1Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706, USA.
概括
科学家们开发了合成转录延长因子 (Syn-TEF) 来控制基因表达. Syn-TEF1 专门针对GAA重复,在弗里德里希的中重新激活frataxin基因表达.
科学领域:
- 分子生物学
- 基因调控
- 合成生物学
背景情况:
- RNA聚合酶II暂停是基因表达的关键调节步骤,特别是在人类发育和疾病中涉及的基因.
- 针对这种限制速度的步骤为各种疾病提供了潜在的治疗策略.
研究的目的:
- 设计和验证能够在目标基因组位点调节基因表达的特定序列合成转录延长因子 (Syn-TEF).
- 为了证明新型Syn-TEF,Syn-TEF1在克服与弗里德里希相关的GAA重复时的有效性.
主要方法:
- 开发模块化Syn-TEF,包括可编程的DNA结合配体和与转录机械相互作用的小分子.
- 应用Syn-TEF1以准frataxin基因位点内的抑制GAA重复.
- 对 Syn-TEF1 促进转录延长和恢复基因表达的能力的评估.
主要成果:
- 通过向特定的DNA序列,Syn-TEFs被设计为基因特异性转录刺激剂.
- Syn-TEF1成功启动了跨GAA重复的转录延长,这通常会使frataxin基因沉默.
- 通过重复的元素来重新激活基因表达.
结论:
- 模块化Syn-TEF设计为开发有针对性的转录调节剂提供了多功能框架.
- 通过直接解决潜在的转录缺陷,Syn-TEF1代表了弗里德里希的治疗候选者.
- 这项技术具有广泛的潜力,用于开发异常基因调节引起的疾病的基因特异性疗法.
相关概念视频
Transcription Elongation Factors
14.1K
Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene.
The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA...
The transcription elongation is regulated via pausing of RNA polymerase on several occasions during transcription. In bacteria, these halts are necessary because the transcription of DNA into mRNA is coupled to the translation of that mRNA...
14.1K
Transcription Elongation Factors
4.9K
4.9K
RNA Polymerase II Accessory Proteins
11.1K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
11.1K
RNA Polymerase II Accessory Proteins
4.1K
4.1K
Co-activators and Co-repressors
8.7K
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...
8.7K
Co-activators and Co-repressors
3.1K
3.1K


