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Updated: Jul 14, 2026

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Identification of Kinase-substrate Pairs Using High Throughput Screening
Published on: August 29, 2015
蛋白激酶C的主要基质的刺激依赖的基化
A A Aderem1, K A Albert, M M Keum
1Rockefeller University, New York, New York 10021.
Nature
|March 24, 1988
概括
细菌脂多糖 (LPS) 通过化蛋白酶C (PKC) 基质,触发巨细胞的反应. 这种myristoylation可能会将蛋白质向细胞膜,调解LPS诱导的细胞信号传递.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 细菌脂多糖 (LPS) 是一种关键的グラム阴性细菌成分,可以激活像巨细胞这样的免疫细胞.
- 虽然LPS对巨细胞功能有深远的影响,增强蛋白质和代谢物释放,但其潜在的分子机制尚不清楚.
- 之前的研究发现了LPS诱导的巨细胞蛋白质的基化,包括68K蛋白质.
研究的目的:
- 研究LPS诱导巨细胞分泌反应的分子机制.
- 为了识别和描述巨细胞中发现的68K基化蛋白质.
- 探索蛋白质基化在LPS介导的细胞信号传递中的作用.
主要方法:
- 使用检测myristoylation的技术进行巨细胞蛋白质分析.
- 与已知的细胞基质进行68K基化蛋白的比较.
- 亚细胞分离以确定蛋白质定位.
主要成果:
- 巨细胞中的68K基化蛋白被认为与80/87K蛋白相似或相同,这是已知的蛋白质激酶C (PKC) 的基质.
- 这种基化PKC基质被发现与细胞膜分量有定量关联.
- 皮细胞刺激促进了巨细胞中这种特定的PKC基质的基化.
结论:
- 通过LPS对80/87K PKC基质的基化可能是将这种蛋白质向巨细胞膜的关键步骤.
- 建议这种膜局部化是LPS诱导的刺激-响应合信号传导途径的关键组成部分.
- 了解这种途径可以让我们深入了解格拉姆阴性细菌的免疫相互作用和巨细胞激活.
相关概念视频
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Amplifying Signals via Enzymatic Cascade
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 the...
MAPK Signaling Cascades
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...
cAMP-dependent Protein Kinase Pathways
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,...
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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