高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (11): 20230239.doi: 10.7503/cjcu20230239

• 分析化学 • 上一篇    下一篇

乙烯砜功能化磁性颗粒的制备及在棕榈酰化肽分析中的应用

郑海娇, 许文辉, 贾琼()   

  1. 吉林大学化学学院, 长春 130012
  • 收稿日期:2023-05-18 出版日期:2023-11-10 发布日期:2023-07-11
  • 通讯作者: 贾琼 E-mail:jiaqiong@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(22004045)

Vinyl Sulfone Functionalized Magnetic Nanoparticles and Its Application in Palmitoylated Peptides Enrichment

ZHENG Haijiao, XU Wenhui, JIA Qiong()   

  1. College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2023-05-18 Online:2023-11-10 Published:2023-07-11
  • Contact: JIA Qiong E-mail:jiaqiong@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22004045)

摘要:

以乙烯砜修饰的磁性颗粒作为磁性固相萃取(MSPE)平台的载体, 与基质辅助激光解吸电离飞行时间质谱或液相色谱-高分辨质谱技术联合, 实现了对复杂样品中低丰度棕榈酰化肽的分离富集. 通过场发射扫描电子显微镜、 红外光谱、 振动样品磁强计、 X射线衍射和Zeta电位测定等手段对合成的功能化磁性材料进行了表征. 用自合成的棕榈酰化的棕榈酰辅酶A模拟棕榈酰化肽标准样品, 在最优实验条件下, 构建的MSPE-MS平台能够实现对棕榈酰化肽的高选择性(牛血清白蛋白酶解物与棕榈酰化肽的摩尔比为2000∶1)和高灵敏度(检出限为1.0 fmol/μL)检测. 研究结果表明, 经乙烯砜功能化的磁性材料对小鼠肝细胞裂解液中低含量的棕榈酰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: 乙烯砜, 磁性颗粒, 磁性固相萃取, 棕榈酰化肽, 质谱检测

Abstract:

Vinyl sulfone modified magnetic nanoparticles(denoted as MagBVP) were synthesized and used as the magnetic carrier of magnetic solid phase extraction(MSPE) platform, combined with MALDI-TOF MS or LC-MS/MS. The MagBVP was characterized by means of vibrating sample magnetometer, field emission scanning electron microscopy, infrared spectroscopy, zeta potential measurement and X-ray diffraction. The synthesized palmitoylated palmitoyl-coA was selected as the modeling palmitoylated peptide sample. Under the optimal conditions, the MSPE-MS platform could achieve high selectivity(BSA tryptic digests/palmitoylated peptide molar ratio of 2000∶1) and sensitivity(the detection limit was determined to be as low as 1.0 fmol/μL) for palmitoylated peptide. Finally, the method was applied to the determination of palmitoylated peptides in cell lysates samples. These results showed that the magnetic material modified by vinyl sulfone had a high selectivity for palmitoylomics.

Key words: Sulfone, Magnetic nanoparticle, Magnetic solid phase extraction, Palmitoylomics, Mass spectrometry

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