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相关概念视频

Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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基于磁珠的工作流程,用于敏感和精简的细胞表面蛋白质学.

Dylan Z Dieters-Castator1, Paolo Manzanillo2, Han-Yin Yang1

  • 1Discovery Proteomics, Amgen Research, South San Francisco, California 94080, United States.

Journal of proteome research
|January 16, 2024
PubMed
概括
此摘要是机器生成的。

我们优化了基于磁珠的细胞表面捕获 (CSC) 工作流程,以有效地识别细胞表面蛋白质,揭示了用于药物开发的体外和体内样本之间的显著差异.

关键词:
在N-glycopeptide的丰富过程中.细胞表面捕获细胞表面捕获质谱测量质谱测量质谱测量质量测量质谱测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量质量测量血膜中的N-糖蛋白是N-糖蛋白.表面经济学 表面经济学

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科学领域:

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

背景情况:

  • 细胞表面蛋白对于治疗向和细胞表型定型至关重要.
  • 基于质谱的蛋白质组学的挑战包括表面蛋白质的低丰度,PTM和疏水性.
  • 现有的方法需要优化,以实现高效的缩和检测.

研究的目的:

  • 优化细胞表面捕获 (CSC) 工作流程,使用基于磁珠的处理来改进细胞表面蛋白质的识别.
  • 评估各种参数,包括标签条件,缩特异性,溶解缓冲区,消化,脱糖化和数据采集方法.
  • 提高表面积分析的效率和可重复性.

主要方法:

  • 优化了基于磁珠的处理的细胞表面捕获 (CSC) 工作流.
  • 评估了标签条件 (生物素标签,催化剂),丰富 (斯特列塔维丁珠),溶解缓冲器,消化,脱糖化和数据采集 (DDA,DIA,TMT).
  • 采用半自动化处理来处理样品,并使用单固体阶段增强样品制备 (SP3).

主要成果:

  • 通过优化CSC工作流程,从25200μg的HeLa蛋白中鉴定出600900个细胞表面N-糖蛋白.
  • 使用阿尔科西胺-PEG4-生物素,SDS/尿素溶解缓冲器,SP3和斯特雷普塔维丁磁珠实现了最大的表面覆盖.
  • 在CT26结肠腺癌的体外单层培养和体内瘤异种移植之间发现了显著的差异.

结论:

  • 基于磁珠的CSC工作流显著提高了表面积分析的效率和可重复性.
  • 这种优化的工作流程可以在减少样本材料的情况下识别新型N-葡萄糖体.
  • 这些发现提供了对细胞表型的洞察力,并有助于用于药物开发的目标识别.