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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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The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
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The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
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量化自上而下的蛋白质组学揭示了激酶抑制剂诱导的癌细胞蛋白形水平变化.

Trishika Chowdhury1, Kellye A Cupp-Sutton1, Yanting Guo2

  • 1Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States.

Journal of proteome research
|December 2, 2024
PubMed
概括

一个新的高通量自上而下的蛋白质组学平台量化完整的蛋白质形式及其修改. 这种方法在HeLa细胞中使用激酶抑制剂治疗后,揭示了催化,代谢和亡途径的显著变化.

关键词:
在 LC-MS/MS 中.顶向下的蛋白质组学抑制酶抑制的方法光蛋白质组学 光蛋白质组学 光蛋白质组学定量化的蛋白质组学.

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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:

  • 对蛋白质和翻译后修饰 (PTM) 的定量分析对于理解细胞过程和疾病至关重要.
  • 顶向下的蛋白质组学通过分析完整的蛋白质形式,提供了对蛋白质组的全面视图.

研究的目的:

  • 开发一个高通量量化自上而下的蛋白质组学平台.
  • 为了研究用氨酸 (STS),一种激酶抑制剂治疗的HeLa细胞中完整的蛋白质和蛋白质丰度的变化.

主要方法:

  • 开发一个高通量量化自上而下的蛋白质组学平台.
  • 用稳定体 (STS) 治疗的HeLa细胞的分析.
  • 蛋白质形式和蛋白质形式的鉴定和量化.

主要成果:

  • 来自215个家族的1187种蛋白质被识别和定量.
  • 来自37个家族的55个蛋白形体在STS治疗后显示出显著的变化,主要是对代谢,代谢和亡途径的变化.
  • 观察到同一个家族内的酸化与非酸化蛋白质的不同调节,以真核细胞启动因子4E结合蛋白1 (4EBP1) 为例.

结论:

  • 开发的平台能够对完整的蛋白形及其PTM进行高吞吐量定量分析.
  • 顶向下的蛋白质组学比底向上的方法更全面地了解细胞对激酶抑制的反应.
  • 蛋白形和蛋白形的差异调节为复杂的细胞信号通路提供了洞察力.