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Characterization of complex transcriptional regulation within the yqjH-yqjI intergenic region.

机译:yqjH-yqjI基因间区域内复杂转录调控的特征。

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摘要

Iron is an essential cofactor for many biological processes. Due to the potential toxicity of iron as a result of Fenton chemistry, iron homeostasis in humans and other mammals is tightly controlled; this leaves only minute amounts of free iron available to invading pathogenic bacteria. This tight regulation forces pathogenic bacteria to scavenge for iron and has led to the development of complex iron acquisition systems (Andrews et al 2003, 216). In E. coli, ferric uptake regulator, Fur, regulates the transcription of several genes involved with iron acquisition (Hantke 2001, 172). One of these genes, yqjH, encodes the enzyme YqjH, a putative ferric reductase. Previous studies have shown that yqjH is also regulated by the divergently transcribed transcription factor YqjI. YqjI represses the transcription of itself and yqjH by binding to two specific sites on the gene promoters (Wang et al 2011, 563). Current studies were designed to characterize the regulation of the yqjH-yqjI intergenic region by Fur and YqjI. We will present how Fur and YqjI binding disruptions affect their regulatory abilities and how our results add to the understanding of the regulation within this complex intergenic region (Wang et al 2012, in preparation).
机译:铁是许多生物过程中必不可少的辅助因子。由于Fenton化学的作用,铁具有潜在的毒性,因此可以严格控制人类和其他哺乳动物体内的铁稳态。这样就只有极少量的游离铁可用于入侵病原菌。这种严格的调节迫使病原菌清除铁,并导致了复杂的铁捕获系统的发展(Andrews等,2003,216)。在大肠杆菌中,铁摄取调节剂Fur调节与铁摄取有关的几个基因的转录(Hantke 2001,172)。这些基因之一yqjH编码酶YqjH,一种假定的铁还原酶。先前的研究表明,yqjH还受发散转录的转录因子YqjI的调控。 YqjI通过结合基因启动子上的两个特定位点来抑制自身和yqjH的转录(Wang等,2011,563)。当前的研究旨在表征Fur和YqjI对yqjH-yqjI基因间区域的调控。我们将介绍Fur和YqjI结合破坏如何影响其调控能力,以及我们的结果如何增加对该复杂基因间区域内调控的了解(Wang等,2012,准备中)。

著录项

  • 作者

    Philipkosky, Katherine E.;

  • 作者单位

    University of South Carolina.;

  • 授予单位 University of South Carolina.;
  • 学科 Chemistry Biochemistry.
  • 学位 M.S.
  • 年度 2012
  • 页码 96 p.
  • 总页数 96
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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