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相关概念视频

Proteomics01:33

Proteomics

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 proteomics...

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一个不偏见的蛋白质基平台,用于基于活动的基化分析.

Zongtao Lin1, Yixuan Xie1, Joanna Gongora1

  • 1Department of Biochemistry and Molecular Biophysics, Washington University in St. Louis, St. Louis, MO 63110.

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概括

蛋白质化,一个由ATE1催化的关键修饰,现在可以使用我们的新型基于活动的化概况 (ABAP) 平台进行识别. 这种方法准确地区分了阿尔吉尼拉和翻译,揭示了新的修改站点.

关键词:
阿尔吉尼化 (Arginylation) 是一种酸转移酶是一种酸转移酶.后翻译修改后的修改.蛋白质概况分析 蛋白质概况分析蛋白质组学 蛋白质组学

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科学领域:

  • 生物化学 生物化学
  • 蛋白质组学是指蛋白质组学.
  • 翻译后修改 翻译后修改

背景情况:

  • 蛋白质 arginylation 是一个重要的后翻译修饰 (PTM),由 arginyl-tRNA-蛋白转移酶1 (ATE1) 催化.
  • 由于质量相同,区分 arginylation 和翻译 arginine 残留物是具有挑战性的.
  • 现有的方法缺乏特定性,无法无偏地识别化基质和化部位.

研究的目的:

  • 开发一个基于活动的ARGINYLATION PROFILING (ABAP) 平台.
  • 为了使无偏见地发现 arginylation 基质和精确的修饰地点.
  • 为了克服区分 arginylation 与翻译 arginine 残留物的挑战.

主要方法:

  • 将同位素氨酸标记集成到使用生物溶解物 (ex vivo) 的ATE1试验中.
  • 通过避免活细胞和核糖体活动,消除转化偏差.
  • 将ABAP平台应用于包括,蛋白质,细胞和组织在内的多种样本类型.

主要成果:

  • 在人类蛋白质组中成功确定了229个独特的阿尔基尼化位点.
  • 证明了平台在各种样本类型中的适用性,输入量最小 (20μg).
  • 验证了具有代表性的 arginylation 位点,并启动了功能后续研究.

结论:

  • ABAP平台提供了一种可靠的方法,用于真诚地识别 arginylation.
  • 这项技术有助于对 arginylation 的功能性表征.
  • 该平台在全球范围内适用,为更广泛的蛋白质化研究铺平了道路.