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Cis-regulatory Sequences02:02

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Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
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Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
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Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
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Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata...
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在细分过程中,无尾的全球镇压.

Lauro Hiroshi Pimentel Masuda1, Alan Utsuni Sabino2, John Reinitz3

  • 1Escola de Artes, Ciências e Humanidades da Universidade de São Paulo, São Paulo, Brazil.

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概括
此摘要是机器生成的。

孤儿核受体 Tailless (Tll) 抑制了Drosophila胚胎中的关键细分基因. 这项研究揭示了Tllll.

关键词:
这种植物是Drosophila.胚胎 胚胎是一个胚胎.图案的形成 图案的形成压制 压制 是一种压制.分段化 分段化 分段化 分段化转录 翻译 翻译没有尾巴的无尾巴.

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科学领域:

  • 发展生物学 发展生物学
  • 遗传学 遗传学 是一个
  • 分子生物学分子生物学

背景情况:

  • 孤儿核受体 Tailless (Tll) 在大脑发育中保留了作用.
  • 在Drosophila细分中的早期tll表达是不寻常的,促使对其调节作用进行调查.

研究的目的:

  • 研究Drosophila胚胎发生过程中对规则条纹上tll的调节.
  • 阐明Tll影响细分基因表达的机制.

主要方法:

  • 在tll.的异胎错表达试验.
  • 胚胎ChIP芯片分析以确定Tll结合部位.
  • 基因调节的数学建模.
  • 使用突变系的基因分析.

主要成果:

  • 宫外Tll抑制了对规则条纹 (毛发的,偶跳过的,矮小的,fushi-tarazu) 和差距基因 (Kruppel,kni,巨人).
  • ChIP芯片数据证实了对规则和差距基因的Tll与cis调节模块 (CRM) 的相互作用.
  • 数学建模支持 Tll 在偶跳过的条纹上充当压缩器.
  • 基因分析显示,Tll和巨人对偶跳过的条纹5进行了协同抑制.

结论:

  • Tll在抑制细分基因,特别是对规则条纹方面发挥着直接作用.
  • 它与其他因素结合作用,在胚胎发育过程中限制介质表达模式.