Skip to Main content Skip to Navigation
Journal articles

Characterization of N-glycosylation and amino acid sequence features of immunoglobulins from swine

Abstract : The primary goal of this study was to develop a method to study the N-glycosylation of IgG from swine in order to detect epitopes containing N-glycolylneuraminic acid (Neu5Gc) and/or terminal galactose residues linked in α1-3 susceptible to cause xenograft-related problems. Samples of immunoglobulin were isolated from porcine serum using protein-A affinity chromatography. The eluate was then separated on electrophoretic gel, and bands corresponding to the N-glycosylated heavy chains were cut off the gel and subjected to tryptic digestion. Peptides and glycopeptides were separated by reversed phase liquid chromatography and fractions were collected for matrix-assisted laser desorption/ionization time-of-flight mass spectrometric (MALDI-TOF-MS) analysis. Overall no α1-3 galactose was detected, as demonstrated by complete susceptibility of terminal galactose residues to β-galactosidase digestion. Neu5Gc was detected on singly sialylated structures. Two major N-glycopeptides were found, EEQFNSTYR and EAQFNSTYR as determined by tandem MS (MS/MS), as previously reported by Butler et al. (Immu-nogenetics, 61, 2009, 209-230), who found 11 subclasses for porcine IgG. Out of the 11, ten include the sequence corresponding to EEQFNSTYR, and only one codes for EAQFNSTYR. In this study, glycosylation patterns associated with both chains were slightly different, in that EEQFNSTYR had a higher content of galactose. The last step of this study consisted of peptide-mapping the 11 reported porcine IgG sequences. Although there was considerable overlap, at least one unique tryptic peptide was found per IgG sequence. The workflow presented in this manuscript constitutes the first study to use MALDI-TOF-MS in the investigation of porcine IgG structural features.
Document type :
Journal articles
Complete list of metadatas

Cited literature [39 references]  Display  Hide  Download
Contributor : Sylvie Le Bihan <>
Submitted on : Wednesday, June 12, 2019 - 9:09:02 AM
Last modification on : Monday, May 25, 2020 - 3:26:05 PM


 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : jamais

Please log in to resquest access to the document


  • HAL Id : inserm-02153160, version 1



Paul Lopez, Lauren Girard, Marjorie Buist, Andrey Gomes de Oliveira, Edward Bodnar, et al.. Characterization of N-glycosylation and amino acid sequence features of immunoglobulins from swine. Glycoconjugate Journal, Springer Verlag, 2016. ⟨inserm-02153160⟩



Record views