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Regulation of Expression Occurs at Multiple Steps02:24

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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.
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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
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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...
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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
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超越淫荡基因表达的AIRE的复杂作用

Pärt Peterson1

  • 1Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia.

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概括
此摘要是机器生成的。

自身免疫调节剂 (AIRE) 通过促进胸腺自身抗原表达来控制T细胞的耐受性. 新出现的证据表明,AIRE还通过1型干扰素信号影响胸膜平衡.

关键词:
自体免疫调节器是什么?基因表达的基因表达方式胸腺 (thymus) 是一个神经系统.第1型干扰子 干扰子

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科学领域:

  • 免疫学 免疫学 免疫学
  • 分子生物学分子生物学
  • 遗传学 遗传学 是一个

背景情况:

  • 中央耐受性对于预防自身免疫性至关重要,并建立在胸腺中.
  • 骨髓胸膜上皮细胞 (mTEC) 和树突细胞 (DC) 是T细胞选择中的关键参与者,受自身免疫调节器 (AIRE) 的影响.
  • AIRE促进组织受限抗原 (TRAs) 的表达,以消除自我反应的T细胞,并促进调节性T细胞 (Treg) 的分化.

研究的目的:

  • 审查了解AIRE复杂性的最新进展.
  • 讨论AIRE在转录调节和核定位方面的作用.
  • 探索AIRE介导的1型干扰素 (T1 IFN) 信号传递在胸腺恒温中的新兴概念.

主要方法:

  • 对AIRE功能的现有文献的审查.
  • 对人类APECED患者和动物模型研究的分析.
  • 检查AIRE与染色质相关复合物的相互作用.

主要成果:

  • AIRE的功能超越了负选择,涉及转录调节和核体定位.
  • 在mTEC中,AIRE影响了广泛的转录组复杂性.
  • 由AIRE诱导的T1 IFN信号表明,它通过炎症途径在胸膜平衡中起作用.

结论:

  • AIRE在甲状腺中的作用比以前理解的要复杂得多,包括转录控制和炎症信号.
  • 在APECED患者中发现T1 IFN自身抗体突显了AIRE,IFN和自身免疫之间的联系.
  • AIRE可以通过涉及T1 IFN.的强力炎症信号来协调胸膜平衡.