Effective Assignment of α2,3/α2,6-Sialic Acid Isomers by LC-MS/MS-Based Glycoproteomics.

Pett C, Nasir W, Sihlbom C, Olsson BM, Caixeta V, Schorlemer M, Zahedi RP, Larson G, Nilsson J, Westerlind U

Angew. Chem. Int. Ed. Engl. 57 (30) 9320-9324 [2018-07-20; online 2018-06-20]

Distinct structural changes of the α2,3/α2,6-sialic acid glycosidic linkages on glycoproteins are of importance in cancer biology, inflammatory diseases, and virus tropism. Current glycoproteomic methodologies are, however, not amenable toward high-throughput characterization of sialic acid isomers. To enable such assignments, a mass spectrometry method utilizing synthetic model glycopeptides for the analysis of oxonium ion intensity ratios was developed. This method was successfully applied in large-scale glycoproteomics, thus allowing the site-specific structural characterization of sialic acid isomers.

Glycoproteomics and MS Proteomics [Technology development]

PubMed 29742324

DOI 10.1002/anie.201803540

Crossref 10.1002/anie.201803540

Publications 9.5.0