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相关概念视频

Phosphorylation01:02

Phosphorylation

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The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
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功能纳米通道用于检测氨酸酸化

Minmin Li1,2, Yuting Xiong1,2, Wenqi Lu1,3

  • 1CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, P. R. China.

Journal of the American Chemical Society
|September 7, 2020
PubMed
概括

用聚乙胺-g-氨 (PEI-PG) 修改的新纳米通道可以在生物样本中特定检测氨酸酸化 (pTyr). 这一突破使得pTyr的精确检测成为癌症研究和药物开发的关键.

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科学领域:

  • 生物技术和纳米技术
  • 分子生物学和生物化学
  • 癌症研究

背景情况:

  • 氨酸酸化 (pTyr) 是细胞信号的关键调节剂,控制细胞功能,其失调与疾病,特别是癌症有关.
  • 精确的pTyr检测对于了解疾病机制和开发向的抗癌疗法至关重要,但由于其与血清素 (pSer) 和三酸化 (pThr) 的相似性,它具有挑战性.
  • 现有的方法难以将pTyr与其他酸化类型区分开来,这阻碍了精确的分子诊断和治疗开发.

研究的目的:

  • 开发一种能够在复杂的生物环境中专门检测氨酸酸化的新型传感平台.
  • 使用基于纳米技术的方法克服区分pTyr与pSer和pThr的挑战.
  • 展示开发的传感器对酶活性和查酶抑制剂的有用性.

主要方法:

  • 用聚乙胺-g-phenylguanidine (PEI-PG) 修改纳米通道以增强与化残留物的相互作用.
  • 使用PEI-PG与化结合时的形状变化,从而产生"关闭"离子流信号.
  • 使用Ca2+作为干扰物的逻辑操作来实现特定的pTyr传感.

主要成果:

  • 用PEI-PG修改的纳米通道成功地将化与未修改的区分开来.
  • 这些纳米通道展示了具有pSer,pThr或pTyr残留的和具有不同数量的相同残留的的识别能力.
  • 即使存在Ca2+作为干扰剂,也能够高精度地检测pTyr,并且可以实时监测基质上的c- Abl激酶活性.

结论:

  • 用聚乙胺-g-phenylguanidine (PEI-PG) 修改的纳米通道提供了一个强大的和特定的平台来检测氨酸酸化 (pTyr).
  • 开发的传感技术可以在生物样本中精确检测pTyr,并实时监测激酶活性.
  • 这种方法对推进癌症诊断,了解疾病状态和促进激酶抑制剂查具有重大潜力.