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相关概念视频

MAPK Signaling Cascades01:07

MAPK Signaling Cascades

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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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Amplifying Signals via Enzymatic Cascade01:22

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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
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Interactions Between Signaling Pathways01:19

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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Intracellular Signaling Cascades01:24

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Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
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cAMP-dependent Protein Kinase Pathways01:25

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Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
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Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
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相关实验视频

Updated: Jul 12, 2025

Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
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导航ERK1/2 MAPK级联的导航

Ana Martin-Vega1, Melanie H Cobb1,2

  • 1Department of Pharmacology, UT Southwestern Medical Center, 6001 Forest Park Rd., Dallas, TX 75390, USA.

Biomolecules
|October 28, 2023
PubMed
概括
此摘要是机器生成的。

该RAS-ERK通路调节细胞生长和存活. 这种途径的失调,特别是ERK1/2,与癌症有关,促使人们探索新的治疗策略.

关键词:
在 ERK1/2 的基础上.这就是MAPKs.癌症 癌症 癌症 癌症 癌症抑制剂 抑制剂 抑制剂脚手架的脚手架是一个脚手架.治疗方法 治疗方法

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Subcellular Fractionation for ERK Activation Upon Mitochondrial-derived Peptide Treatment
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相关实验视频

Last Updated: Jul 12, 2025

Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
08:40

Spatial and Temporal Analysis of Active ERK in the C. elegans Germline

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科学领域:

  • 细胞信号传递和分子生物学.
  • 癌症生物学和治疗学.

背景情况:

  • RAS-ERK通路是控制细胞增殖,生长,存活和细胞循环的基本信号级联.
  • ERK1/2激酶是关键的效应因子,与众多基质相互作用,并在干细胞和胰腺β细胞中发挥上下文依赖的作用.
  • 途径失调,通常是由于异常RAS-ERK激活,涉及到各种疾病,特别是癌症.

研究的目的:

  • 为RAS-ERK路径的结构,激活,调节和突变场景提供全面的概述.
  • 强调脚手架蛋白在协调酶-基质相互作用中的关键作用.
  • 探索针对RAS-ERK途径治疗疾病的新兴治疗策略.

主要方法:

  • 文献综述和对RAS-ERK路径现有研究的综合.
  • 途径组件的分析,包括架构蛋白和效应酶 (ERK1/2).
  • 探索当前和新的治疗方法.

主要成果:

  • RAS-ERK级联对正常细胞功能至关重要,ERK1/2作为中央调节器.
  • 脚手架蛋白对于组织信号复合体和确保高效的信号传导至关重要.
  • 突变和途径的异常激活是瘤发生的重要贡献者.

结论:

  • 了解RAS-ERK通路的复杂性,包括支架蛋白的功能,对于理解其在疾病中的作用至关重要.
  • 准RAS-ERK通路,特别是ERK1/2,对开发有效的癌症疗法具有重大前景.
  • 对创新的治疗途径的持续研究对于对抗RAS-ERK驱动的病理是必不可少的.