Analytical and Bioanalytical Chemistry

, Volume 403, Issue 8, pp 2279–2289

LC-MS/MS biopharmaceutical glycoanalysis: identification of desirable reference material characteristics

  • John E. Schiel
  • Jennifer Au
  • Hua-Jun He
  • Karen W. Phinney
Original Paper

DOI: 10.1007/s00216-012-5749-5

Cite this article as:
Schiel, J.E., Au, J., He, HJ. et al. Anal Bioanal Chem (2012) 403: 2279. doi:10.1007/s00216-012-5749-5

Abstract

Glycosylation, the enzymatic addition of carbohydrates to a protein, is one of the most abundant post-translational modifications found in nature. There is variability in the number, location, and identity of glycans attached. As a result, a glycoprotein consists of a number of glycoforms with different combinations of glycans, potentially resulting in different stability, toxicity, and activity. This is especially important in the biopharmaceutical industry where product consistency and safety are vital. Glycoprotein analysis involves numerous mass spectrometry based techniques, each of which provides various aspects of characterization. The current paper describes two commonly used analytical techniques for glycoprotein characterization. In one experiment, nonspecific proteolysis is combined with a two-tiered mass spectrometry approach (MALDI-TOF and LC-MS/MS) to gain glycosylation site and glycan identity. In a second approach, glycans were enzymatically released, labeled with a fluorescent dye, and analyzed using LC-Fluorescence-MS/MS to give glycan identification and relative quantification. The type and degree of information yielded by each method is assessed in an effort to identify desired reference material characteristics for improving biopharmaceutical glycoanalysis.

Keywords

BiopharmaceuticalGlycoproteinGlycanMass spectrometryStandardsReference material

Supplementary material

216_2012_5749_MOESM1_ESM.pdf (1019 kb)
ESM 1(PDF 304 kb)

Copyright information

© Springer-Verlag (outside the USA) 2012

Authors and Affiliations

  • John E. Schiel
    • 1
  • Jennifer Au
    • 1
  • Hua-Jun He
    • 1
  • Karen W. Phinney
    • 1
  1. 1.National Institute of Standards and TechnologyAnalytical Chemistry DivisionGaithersburgUSA