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相关概念视频

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Subcellular Fractionation01:32

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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
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Updated: Sep 11, 2025

Measurement of Protein Turnover Rates in Senescent and Non-Dividing Cultured Cells with Metabolic Labeling and Mass Spectrometry
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用亚细胞空间分辨率分析蛋白质周转动力学分析

Lorena Alamillo1, Alexander Black1, Maggie P Y Lam1,2,3

  • 1Deptartment of Medicine, University of Colorado School of Medicine, Aurora, CO, USA.

Bio-protocol
|August 13, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了同时蛋白质组局部化和周转 (SPLAT) 分析,这是一种测量整个蛋白质组中蛋白质周转率和亚细胞局部化的新方法. SPLAT提供了对细胞区内的蛋白质动态的全面了解,这对于了解与年龄相关的疾病至关重要.

关键词:
质谱测量质量谱测量蛋白质组学是指蛋白质组学.空间蛋白质组学是什么意思亚细胞局部化的局部化.时间性蛋白质组学公司营业额 营业额

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科学领域:

  • 细胞生物学 细胞生物学
  • 蛋白质组学是指蛋白质组学.
  • 生物化学 生物化学

背景情况:

  • 蛋白质平衡,包括合成和降解,对细胞功能至关重要,并与衰老有关.
  • 现有的研究亚细胞区中的蛋白质循环的方法往往具有侵入性或范围有限.
  • 了解特定细胞位置内的蛋白质动态对于疾病研究至关重要.

研究的目的:

  • 开发一种新的协议,用于同时测量全蛋白质组的蛋白质周转率和亚细胞局部.
  • 为评估分区特异性蛋白质动态提供一种公正的方法.
  • 为了能够详细分析蛋白质的空间和时间分布.

主要方法:

  • 同时蛋白质组定位和周转 (SPLAT) 分析.
  • 在细胞培养中对氨基酸进行动态稳定同位素标记 (动态SILAC) 以获得时间分辨率.
  • 多步差异超离心法用于亚细胞局部化.
  • 2D液态色谱分离和双重质量标签 (TMT) 提高深度和缩短采集时间.

主要成果:

  • SPLAT分析成功地同时测量了蛋白质周转率和亚细胞定位.
  • 该协议提供了全蛋白质组,分区特定的周转率.
  • 它揭示了蛋白质的空间和时间分布,包括蛋白质池内的暂时不同的定位.
  • 动态SILAC和TMT LOPIT-DC的超复杂化增强了数据采集和数据深度.

结论:

  • SPLAT分析提供了一种强大的,公正的工具,用于研究细胞下部分的蛋白质动力学.
  • 这种方法显著提高了比较器官细胞蛋白质组周转率的能力.
  • 该协议有助于更深入地了解蛋白质平衡及其在与年龄相关疾病中的作用.