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相关概念视频

Conservative Site-specific Recombination and Phase Variation02:53

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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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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BEAM:用于二进制基因表达和马赛克遗传分析的组合重组酶工具箱.

Luciano C Greig1, Mollie B Woodworth1, Alexandros Poulopoulos1

  • 1Department of Stem Cell and Regenerative Biology and Center for Brain Science, Harvard University, Cambridge, MA, USA; Harvard Medical School, Boston, MA, USA.

Cell reports
|August 19, 2024
PubMed
概括

我们开发了一种新的二进制表达力模拟马赛克 (BEAM) 系统,用于精确的细胞比较. 这种方法使用基因操纵和独特的光标记物可靠地识别细胞表型和测试发育假设.

关键词:
CP: 细胞生物学 细胞生物学创意的创意,就是创造的.在Flp Flp Flp中使用.基因分析 遗传分析马赛克主义的马赛克主义.复合酶可以重组.

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科学领域:

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

背景情况:

  • 对比细胞分析对于理解生物过程至关重要.
  • 目前用于区分细胞群的方法可能缺乏可靠性和精度.
  • 需要改进的工具来研究细胞功能和发育机制是持续的.

研究的目的:

  • 引入二进制表达式 (BEAM) 系统,用于生成和比较两个不同的细胞群.
  • 通过信号放大和延迟的记者表达来提高比较细胞分析的可靠性和精度.
  • 验证BEAM在研究细胞表型和测试发育假设,如皮质原图假设等方面的实用性.

主要方法:

  • 通过转染或病毒转导利用DNA传递.
  • 采用嵌套的重组酶活性来创建遗传上不同的细胞群.
  • 实施对照细胞的红色光蛋白 (RFP) 和实验细胞的绿色光蛋白 (GFP).
  • 包括依赖复合酶的信号放大和延迟的记者表达.

主要成果:

  • 为了直接比较,BEAM成功生成了两种基因上不同的,不重叠的细胞群.
  • 该系统展示了对照和实验细胞的更清晰的划分,提高了可靠性.
  • BEAM有效地识别了时间或空间异常的表型,细胞增殖/死亡的变化,并控制了程序变异性.
  • 对皮层原图假设的应用揭示了区域认同的细胞自主规范.

结论:

  • BEAM系统为比较细胞分析提供了一种强大而可靠的方法.
  • BEAM有助于识别微妙或复杂的细胞表型.
  • 该系统为研究基本生物学问题,包括发育模式的研究提供了一个强大的平台.