Simultaneous glycan-peptide characterization using hydrophilic interaction chromatography and parallel fragmentation by CID, higher energy collisional dissociation, and electron transfer dissociation MS applied to the N-linked glycoproteome of Campylobacter jejuni

Loading...
Thumbnail Image
File version

Version of Record (VoR)

Author(s)
Scott, Nichollas E
Parker, Benjamin L
Connolly, Angela M
Paulech, Jana
Edwards, Alistair VG
Crossett, Ben
Falconer, Linda
Kolarich, Daniel
Djordjevic, Steven P
Hojrup, Peter
Packer, Nicolle H
Larsen, Martin R
Cordwell, Stuart J
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2011
Size
File type(s)
Location
License
Abstract

Campylobacter jejuni is a gastrointestinal pathogen that is able to modify membrane and periplasmic proteins by the N-linked addition of a 7-residue glycan at the strict attachment motif (D/E)XNX(S/T). Strategies for a comprehensive analysis of the targets of glycosylation, however, are hampered by the resistance of the glycan-peptide bond to enzymatic digestion or β-elimination and have previously concentrated on soluble glycoproteins compatible with lectin affinity and gel-based approaches. We developed strategies for enriching C. jejuni HB93-13 glycopeptides using zwitterionic hydrophilic interaction chromatography and examined novel fragmentation, including collision-induced dissociation (CID) and higher energy collisional (C-trap) dissociation (HCD) as well as CID/electron transfer dissociation (ETD) mass spectrometry. CID/HCD enabled the identification of glycan structure and peptide backbone, allowing glycopeptide identification, whereas CID/ETD enabled the elucidation of glycosylation sites by maintaining the glycan-peptide linkage. A total of 130 glycopeptides, representing 75 glycosylation sites, were identified from LC-MS/MS using zwitterionic hydrophilic interaction chromatography coupled to CID/HCD and CID/ETD. CID/HCD provided the majority of the identifications (73 sites) compared with ETD (26 sites). We also examined soluble glycoproteins by soybean agglutinin affinity and two-dimensional electrophoresis and identified a further six glycosylation sites. This study more than doubles the number of confirmed N-linked glycosylation sites in C. jejuni and is the first to utilize HCD fragmentation for glycopeptide identification with intact glycan. We also show that hydrophobic integral membrane proteins are significant targets of glycosylation in this organism. Our data demonstrate that peptide-centric approaches coupled to novel mass spectrometric fragmentation techniques may be suitable for application to eukaryotic glycoproteins for simultaneous elucidation of glycan structures and peptide sequence.

Journal Title

Molecular and Cellular Proteomics

Conference Title
Book Title
Edition
Volume

10

Issue

2

Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement

This research was originally published in Molecular & Cellular Proteomics (MCP). Scott et al, Simultaneous glycan-peptide characterization using hydrophilic interaction chromatography and parallel fragmentation by CID, higher energy collisional dissociation, and electron transfer dissociation MS applied to the N-linked glycoproteome of Campylobacter jejuni, Molecular & Cellular Proteomics (MCP), 2011; 10(2): M000031-MCP201. Copyright the American Society for Biochemistry and Molecular Biology. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitve version.

Item Access Status
Note
Access the data
Related item(s)
Subject

Biochemistry and cell biology not elsewhere classified

Persistent link to this record
Citation
Collections