PMID- 32886488 OWN - NLM STAT- MEDLINE DCOM- 20210216 LR - 20231112 IS - 1520-6882 (Electronic) IS - 0003-2700 (Print) IS - 0003-2700 (Linking) VI - 92 IP - 19 DP - 2020 Oct 6 TI - Site-Specific Glycosylation Mapping of Fc Gamma Receptor IIIb from Neutrophils of Individual Healthy Donors. PG - 13172-13181 LID - 10.1021/acs.analchem.0c02342 [doi] AB - Fc gamma receptors (FcgammaRs) translate antigen recognition by immunoglobulin G (IgG) into various immune responses. A better understanding of this key element of immunity promises novel insights into mechanisms of (auto-/allo-)immune diseases and more rationally designed antibody-based drugs. Glycosylation on both IgG and FcgammaR impacts their interaction dramatically. Regarding FcgammaR glycosylation profiling, major analytical challenges are associated with the presence of multiple glycosylation sites in close proximity and large structural heterogeneity. To address these challenges, we developed a straightforward and comprehensive analytical methodology to map FcgammaRIIIb glycosylation in primary human cells. After neutrophil isolation and immunoprecipitation, glycopeptides containing a single site each were generated by a dual-protease in-gel digestion. The complex mixture was resolved by liquid chromatography-tandem mass spectrometry (LC-MS/MS) providing information on the level of individual donors. In contrast to recently published alternatives for FcgammaRIIIb, we assessed its site-specific glycosylation in a single LC-MS/MS run and simultaneously determined the donor allotype. Studying FcgammaRIIIb derived from healthy donor neutrophils, we observed profound differences as compared to the soluble variant and the homologous FcgammaRIIIa on natural killer cells. This method will allow assessment of differences in FcgammaRIII glycosylation between individuals, cell types, subcellular locations, and pathophysiological conditions. FAU - Wojcik, Iwona AU - Wojcik I AUID- ORCID: 0000-0002-9365-1616 AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. AD - Glycoscience Research Laboratory, Genos Ltd., Zagreb 10000, Croatia. FAU - Senard, Thomas AU - Senard T AUID- ORCID: 0000-0001-5951-4127 AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - de Graaf, Erik L AU - de Graaf EL AD - Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, The Netherlands. FAU - Janssen, George M C AU - Janssen GMC AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - de Ru, Arnoud H AU - de Ru AH AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - Mohammed, Yassene AU - Mohammed Y AUID- ORCID: 0000-0003-3265-3332 AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - van Veelen, Peter A AU - van Veelen PA AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - Vidarsson, Gestur AU - Vidarsson G AD - Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1066 CX Amsterdam, The Netherlands. FAU - Wuhrer, Manfred AU - Wuhrer M AUID- ORCID: 0000-0002-0814-4995 AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. FAU - Falck, David AU - Falck D AUID- ORCID: 0000-0003-3908-2376 AD - Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200922 PL - United States TA - Anal Chem JT - Analytical chemistry JID - 0370536 RN - 0 (FCGR3B protein, human) RN - 0 (GPI-Linked Proteins) RN - 0 (Receptors, IgG) SB - IM MH - Chromatography, Liquid MH - GPI-Linked Proteins/analysis/immunology MH - Glycosylation MH - Healthy Volunteers MH - Humans MH - Neutrophils/*chemistry/cytology MH - *Protein Interaction Mapping MH - Receptors, IgG/analysis/*immunology MH - Tandem Mass Spectrometry PMC - PMC7547861 COIS- The authors declare the following competing financial interest(s): I.W. is employed by Genos Ltd. and E.L.G is employed by Pepscope Ltd. No potential conflict of interest was reported by the remaining authors. EDAT- 2020/09/05 06:00 MHDA- 2021/02/17 06:00 PMCR- 2020/10/10 CRDT- 2020/09/04 17:08 PHST- 2020/09/05 06:00 [pubmed] PHST- 2021/02/17 06:00 [medline] PHST- 2020/09/04 17:08 [entrez] PHST- 2020/10/10 00:00 [pmc-release] AID - 10.1021/acs.analchem.0c02342 [doi] PST - ppublish SO - Anal Chem. 2020 Oct 6;92(19):13172-13181. doi: 10.1021/acs.analchem.0c02342. Epub 2020 Sep 22.