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相关概念视频

Intracellular Hormone Receptors01:08

Intracellular Hormone Receptors

Lipid-soluble hormones diffuse across the plasma and nuclear membrane of target cells to bind to their specific intracellular receptors. These receptors act as transcription factors that regulate gene expression and protein synthesis in the target cell
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Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...

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相关实验视频

Updated: Jul 13, 2026

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
06:58

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Published on: June 13, 2010

一个RNA传感器检测细胞内Mg2+).

Michael J Cromie1, Yixin Shi, Tammy Latifi

  • 1Howard Hughes Medical Institute, Department of Molecular Microbiology, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8230, St. Louis, MO 63110, USA.

Cell
|April 18, 2006
PubMed
概括

这项研究揭示了RNA作为离子 (Mg2+) 的传感器. mgtA基因的5'未翻译区域调节基于不同细胞区的Mg2+水平的转录.

科学领域:

  • 分子生物学分子生物学
  • 遗传学 是一个遗传学.
  • 生物化学 生物化学

背景情况:

  • 离子 (Mg2+) 对于RNA结构和功能至关重要.
  • 细胞Mg2+平衡对于各种生物过程至关重要.
  • 通过RNA感知细胞内Mg2+的机制在很大程度上是未知的.

研究的目的:

  • 识别和描述感知细胞质Mg2+水平的RNA分子.
  • 阐明Mg2+通过RNA结构影响基因表达的机制.
  • 研究5'未翻译区域 (5'UTR) 在Mg2+感应和基因调节中的作用.

主要方法:

  • 在体外转录分析使用纯化的RNA聚合酶.
  • 对RNA二次结构的分析,以应对不同的Mg2+度.
  • 记者基因测试测量mgtA基因表达.
  • 在mgtA 5'UTR.的位点定向突变发生.

主要成果:

  • 沙门氏菌的5'UTR Enteric Serovar Typhimurium mgtA基因作为一个Mg2+传感器.
  • 2+度决定了mgtA 5'UTR中替代干环结构的形成.
  • 这些结构变化调节了转录的读透到mgtA编码序列.

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Last Updated: Jul 13, 2026

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
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Published on: June 13, 2010

Antibody-Free Assay for RNA Methyltransferase Activity Analysis
08:31

Antibody-Free Assay for RNA Methyltransferase Activity Analysis

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Dot Blot Assay for Detecting Global N6-Methyladenosine RNA Modification Levels
08:40

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  • mgtA转录的启动受到外细胞质Mg2+的调节,而延长受到细胞质Mg2+的控制.

    • 结论:

    • RNA可以作为细胞质Mg2+的直接传感器.
    • mgtA 5'UTR提供了一种新的Mg2+依赖基因调节机制.
    • 在不同的细胞区中对Mg2+的差异感知调节了转录的单独步骤.