Structural characterization of pyridylaminated oligosaccharides derived from neutral glycosphingolipids by high-sensitivity capillary electrophoresis-mass spectrometry

Emi Ito, Kazuki Nakajima, Hiroaki Waki, Kozo Miseki, Takashi Shimada, Taka Aki Sato, Kazuaki Kakehi, Minoru Suzuki, Naoyuki Taniguchi, Akemi Suzuki

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

High-sensitivity capillary electrophoresis-electrospray ionization quadrupole ion trap time-of-flight mass spectrometry (CE-ESI-QIT-TOF MS) was developed to structurally characterize four kinds of pyridylaminated (PA) oligosaccharides, i.e., lactose (Lac)-PA, globotriose (Gb3)-PA, globotetraose (Gb4)-PA, and IV3 αGalNAc-Gb 4 (Forssman antigen)-PA, derived from neutral glycosphingolipids. The CE-MS system included the head-column field-amplified sample stacking (HC-FASS) method for effective sample injection into a capillary column in CE, a sheathless interface between CE and a mass spectrometer, and MS and tandem MS (MS2) measurements with narrow mass range repeated high-speed switching. The total sensitivity of the developed CE-MS system was about 20 000 times higher than that of the conventional CE-MS system consisting of pressure injection, a sheath-flow interface, and a wide mass range measurement. The MS and MS2 spectra of the four PA-oligosaccharides at a concentration of 25 amol/μL in mixtures (each 250 amol/10 μL in a tube) clearly showed protonated molecular ions ([M + H]+) and the fragment ions responsible for the sequential elimination of saccharides. The developed CE-MS system is a powerful method for the structural characterization of glycosphingolipids extracted from very small amounts of biological materials and could be extended to the structural characterization of oligosaccharides derived from glycoproteins.

Original languageEnglish
Pages (from-to)7859-7865
Number of pages7
JournalAnalytical Chemistry
Volume85
Issue number16
DOIs
Publication statusPublished - 20-08-2013

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Neutral Glycosphingolipids
Capillary electrophoresis
Oligosaccharides
Mass spectrometry
Ions
Forssman Antigen
Electrospray ionization
Glycosphingolipids
Mass spectrometers
Lactose
Biological materials
Glycoproteins

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Ito, Emi ; Nakajima, Kazuki ; Waki, Hiroaki ; Miseki, Kozo ; Shimada, Takashi ; Sato, Taka Aki ; Kakehi, Kazuaki ; Suzuki, Minoru ; Taniguchi, Naoyuki ; Suzuki, Akemi. / Structural characterization of pyridylaminated oligosaccharides derived from neutral glycosphingolipids by high-sensitivity capillary electrophoresis-mass spectrometry. In: Analytical Chemistry. 2013 ; Vol. 85, No. 16. pp. 7859-7865.
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Structural characterization of pyridylaminated oligosaccharides derived from neutral glycosphingolipids by high-sensitivity capillary electrophoresis-mass spectrometry. / Ito, Emi; Nakajima, Kazuki; Waki, Hiroaki; Miseki, Kozo; Shimada, Takashi; Sato, Taka Aki; Kakehi, Kazuaki; Suzuki, Minoru; Taniguchi, Naoyuki; Suzuki, Akemi.

In: Analytical Chemistry, Vol. 85, No. 16, 20.08.2013, p. 7859-7865.

Research output: Contribution to journalArticle

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T1 - Structural characterization of pyridylaminated oligosaccharides derived from neutral glycosphingolipids by high-sensitivity capillary electrophoresis-mass spectrometry

AU - Ito, Emi

AU - Nakajima, Kazuki

AU - Waki, Hiroaki

AU - Miseki, Kozo

AU - Shimada, Takashi

AU - Sato, Taka Aki

AU - Kakehi, Kazuaki

AU - Suzuki, Minoru

AU - Taniguchi, Naoyuki

AU - Suzuki, Akemi

PY - 2013/8/20

Y1 - 2013/8/20

N2 - High-sensitivity capillary electrophoresis-electrospray ionization quadrupole ion trap time-of-flight mass spectrometry (CE-ESI-QIT-TOF MS) was developed to structurally characterize four kinds of pyridylaminated (PA) oligosaccharides, i.e., lactose (Lac)-PA, globotriose (Gb3)-PA, globotetraose (Gb4)-PA, and IV3 αGalNAc-Gb 4 (Forssman antigen)-PA, derived from neutral glycosphingolipids. The CE-MS system included the head-column field-amplified sample stacking (HC-FASS) method for effective sample injection into a capillary column in CE, a sheathless interface between CE and a mass spectrometer, and MS and tandem MS (MS2) measurements with narrow mass range repeated high-speed switching. The total sensitivity of the developed CE-MS system was about 20 000 times higher than that of the conventional CE-MS system consisting of pressure injection, a sheath-flow interface, and a wide mass range measurement. The MS and MS2 spectra of the four PA-oligosaccharides at a concentration of 25 amol/μL in mixtures (each 250 amol/10 μL in a tube) clearly showed protonated molecular ions ([M + H]+) and the fragment ions responsible for the sequential elimination of saccharides. The developed CE-MS system is a powerful method for the structural characterization of glycosphingolipids extracted from very small amounts of biological materials and could be extended to the structural characterization of oligosaccharides derived from glycoproteins.

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