Preparation of tannic acid and L-cysteine functionalized magnetic composites for synergistic enrichment of N-glycopeptides followed by mass spectrometric analysis

Anal Methods. 2022 Sep 1;14(34):3260-3269. doi: 10.1039/d2ay01169g.

Abstract

Glycoprotein is involved in a variety of biological activities and has been linked to a number of diseases. Glycopeptide enrichment prior to mass spectrometry (MS) detection is crucial to reduce interference, improve detection efficiency, and analyze proteomics deeply and comprehensively. Here, we prepared a novel magnetic hydrophilic material combining tannic acid (TA) and L-cysteine (L-Cys) through a simple and fast procedure. Owing to the synergistic hydrophilic interaction of TA and L-Cys, the obtained adsorbent material shows excellent enrichment performance toward N-glycopeptides with low detection limit, high selectivity, and good reusability. Besides, the material can also be utilized for the enrichment of N-glycopeptides in human serum and saliva, which shows its application prospect in complex biological samples.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cysteine* / chemistry
  • Glycopeptides* / analysis
  • Glycopeptides* / chemistry
  • Humans
  • Magnetic Phenomena
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
  • Tannins

Substances

  • Glycopeptides
  • Tannins
  • Cysteine