高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (3): 717.doi: 10.7503/cjcu20200685

• 分析化学 • 上一篇    下一篇

精氨酸功能化磁性纳米材料的制备及在磷酸化肽富集中的应用

郑海娇1, 姜丽艳2, 贾琼1()   

  1. 1.吉林大学化学学院
    2.生命科学学院, 长春 130012
  • 收稿日期:2020-09-15 出版日期:2021-03-10 发布日期:2021-03-08
  • 通讯作者: 贾琼 E-mail:jiaqiong@jlu.edu.cn
  • 基金资助:
    吉林省科技厅自然科学基金(20190201079JC);中国博士后科学基金(2019M651193)

Arginine Functionalized Magnetic Nanoparticles and Its Application in Phosphopeptides Enrichment

ZHENG Haijiao1, JIANG Liyan2, JIA Qiong1()   

  1. 1.College of Chemistry
    2.College of Life Sciences,Jilin University,Changchun 130012,China
  • Received:2020-09-15 Online:2021-03-10 Published:2021-03-08
  • Contact: JIA Qiong E-mail:jiaqiong@jlu.edu.cn
  • Supported by:
    ? Supported by the Jilin Provincial Science & Technology Department, China(20190201079JC);the China Postdoctoral Science Foundation(2019M651193)

摘要:

以精氨酸修饰的磁性微球作为磁性固相萃取(MSPE)平台的载体, 结合基质辅助激光解吸电离飞行时间质谱(MALDI-TOF MS)技术, 实现了对复杂样品中低丰度磷酸化肽的分离富集. 采用场发射扫描电子显微镜、 Zeta电位测定、 红外光谱分析、 振动样品磁强计及X射线衍射分析等手段对合成的功能化磁性材料进行了表征. 选择β-酪蛋白酶解产物磷酸化肽为标准品, 在最佳实验条件下, 利用构建的MSPE-MS平台能够实现对磷酸化肽的高选择性和高灵敏度检测, 检出限为0.1 fmol. 实验结果表明, 经精氨酸修饰的磁性材料对牛奶样品中低含量的磷酸化肽具有较高的选择性, 所建立的方法适用于复杂样品的分离分析.

关键词: 磁性纳米材料, 精氨酸, 磁性固相萃取, 磷酸化肽, 质谱检测

Abstract:

Arginine modified magnetic nanoparticles(Mag-Arg) were synthesized and used as themagnetic carrier of magnetic solid phase extraction(MSPE) platform. The prepared magnetic nanoparticles were applied to the enrichment of phosphopeptides from complex samples coupled with MALDI-TOF MS. Mag-Arg was characterized by means of scanning electron microscopy, particle size analysis, Zeta potential measurement, infrared spectroscopy, vibrating sample magnetometer and X-ray diffraction. Under the optimal adsorption desorption conditions, the MSPE-MS platform could achieve high selectivity and sensitivity(the detection limit was determined to be as low as 0.1 fmol) for phosphopeptides. Finally, the method was applied to the determination of phosphopeptides in nonfat milk, showing great potential in the detection of low-abundance phosphopeptides in real complex biological samples.

Key words: Magnetic Nanoparticle, Arginine, Magnetic solid phase extraction, Phosphopepties, Mass spectrometry

中图分类号: 

TrendMD: