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RNA Polymerase II Accessory Proteins02:36

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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...
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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
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The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals.
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在中RNA激活.

Kofi Dadzie Kwofie1,2, Emmanuel Pacia Hernandez1,3, Anisuzzaman4

  • 1Department of Parasitology and Tropical Medicine, Kitasato University School of Medicine, Sagamihara, Kanagawa, 252-0374, Japan.

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概括

研究人员首次在中显示RNA激活 (RNAa),使用双链RNA (dsRNA) 促进基因表达. 这一发现为控制和了解传播疾病开辟了新的途径.

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科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 昆虫学 昆虫学是一门学科.

背景情况:

  • RNA激活 (RNAa) 通过dSRNA向促进体或3'-UTR.上调基因表达.
  • 在哺乳动物,植物,细菌,C. elegans和Aedes aegypti中观察到RNAa.
  • 在子中尚未探索RNAa,尽管存在必要的阿尔戈纳特2蛋白质.

研究的目的:

  • 为了研究在载体中RNAa的潜在存在,Haemaphysalis longicornis.
  • 通过准一种新型的内基因类基因 (HlemCHT) 来探索H. longicornis卵中的dsRNA介导的基因激活.

主要方法:

  • 在H. longicornis蛋中识别并准HlemCHT基因的3'-UTR.
  • 在蛋中注射了针对HlemCHT (dsHlemCHT) 的dsRNA.
  • 在注射后监测基因表达水平和卵子发育.

主要成果:

  • 在dSHlemCHT注射卵中的HlemCHT基因表达增加在13天后oviposition.
  • 在注射dSHlemCHT的子中观察到加速卵的发育和化.
  • 提供了在中RNAa现象的第一个证据.

结论:

  • 的RNAa可能存在于中,提供了一种新的基因激活机制.
  • dsRNA介导的HlemCHT激活表明它在蛋发育中的作用.
  • RNAa可以作为基因过度表达工具用于生物学的研究和传播疾病的控制.