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Boronic acid and fructose-1,6-diphosphate dual-functionalized highly hydrophilic Zr-MOF for HILIC enrichment of N-linked glycopeptides

Zhou Xiaoyu,Zhang Hongyan,Wang Li,Wu Ren’an

The HILIC enrichment is a greatly compatible strategy for the extraction of glycopeptides in proteomics. Herein, a boric acid and fructose-1,6-diphosphate (FDP) dual-functionalized Zr-based metal–organic framework material UIO-PBA&FDP (UIO is the abbreviation for the University of Oslo, and PBA is the abbreviation for carboxy phenylboronic acid) was synthesized, characterized with the desirable excellent hydrophilicity and thus was explored for the enrichment of N-linked glycopeptides utilizing the HILIC interaction between the glycopeptides and the hydrophilic UIO-PBA&FDP at a high level of ACN concentration. A total of 359 N-linked glycopeptides corresponding to 104 glycoproteins were identified from only 1 μL of digested human serum by the enrichment of UIO-PBA&FDP, which showed a superiorly high coverage of the identified glycopeptides. The dual hydrophilic functionalized UIO-PBA&FDP could be an efficient HILIC material for the enrichment of N-linked glycopeptides from complex biological samples.