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Acta Chimica Sinica >

2013 , Vol. 71 >Issue 04: 535 - 540

DOI: https://doi.org/10.6023/A13020176

Article

Preparation of Boronic Acid-Functionalized Mesoporous Nanomaterial and Its Application in Enrichment of Glycopeptides

  • Liu Liting ,
  • Zhang Ying ,
  • Jiao Jing ,
  • Yang Pengyuan ,
  • Lu Haojie
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  • Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433

Received date: 2013-02-04

  Online published: 2013-03-15

Supported by

Project supported by the National Program on Key Basic Research Project (Nos. 2012CB910602, 2012AA020203), National Natural Science Foundation of China (Nos. 21025519, 21005020, 31070732), Shanghai Projects (11XD1400800, Eastern Scholar, B109 and 20114Y167).

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Abstract

A boronic acid-functionalized mesoporous nanomaterial was prepared by using a two-step post-grafting method. Firstly, the 3-glycidyloxypropyltrimethoxysilane (GLYMO) and 3-aminophenylboronic acid monohydrate (APB) were reacted in oxyhydrogen sodium solution (pH 9.18) to prepare boronic-acid bonded GLYMO (denoted as GLYMO-APB). Secondly, the MCM-41 was added into the prepared GLYMO-APB solution to prepare the final product of boronic acid functionalized MCM-41 (denoted as MCM-41-GLYMO-APB). This as-prepared material was characterized by FT-IR and the results showed that the boronic acid groups were successfully grafted to MCM-41. Glycopeptides can be enriched with high selectivity and high efficiency based on the formation of a cyclic diester between boronic hydroxyl and cis-diol on the glycan chain. The conditions of enriching glycopeptides in mixed digests of standard proteins by MCM-41-GLYMO-APB were compared and optimized. The incubation time, incubation solutions, washing ways and eluents used in the enrichment of glycopeptides were investigated. When using the ammonium bicarbonate buffer (100 mmol/L, pH 8.0) as the incubation solution and incubated for 1 h, the maximum number of enriched glycopeptides from horseradish peroxidase (HRP) digests could be obtained. After enrichment, washing the prepared material with the incubation solution twice for 5 min, nonglycopeptides interference can be in a large extent removed. The enriched glycopeptides binding to the surface of MCM-41-GLYMO-APB could be released when using 1% trifluoroacetic acid containing 2,5-dihydroxybenzoic acid as the eluent, the operating steps could be simplified when using this optimized eluent because there was no need of adding the MALDI matrix solution afterwards. Therefore, this optimized protocol provided a reference for the glycopeptide enrichment with boronic acid-functionalized materials, and it also laid the foundation for the research of utilizing boronic acid-based chemical method to the glycopeptide enrichment in biological samples. Meanwhile, the highly ordered hexagonal cylindrical mesoporous structure of MCM-41-GLYMO-APB provided the possibility of being used for the research of glycopeptidome in biological samples.

Key words： glycoproteins; boronic acid-functionalized mesoporous nanomaterial; enrichment; mass spectrometry

Cite this article

Liu Liting , Zhang Ying , Jiao Jing , Yang Pengyuan , Lu Haojie . Preparation of Boronic Acid-Functionalized Mesoporous Nanomaterial and Its Application in Enrichment of Glycopeptides[J]. Acta Chimica Sinica, 2013 , 71(04) : 535 -540 . DOI: 10.6023/A13020176

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