Proteomics

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Spatiotemporal glycoproteome remodelling in neutrophils


ABSTRACT: Neutrophils are short-lived yet vital innate immune cells equipped with bioactive glycoproteins packed in cytosolic granules that can readily be mobilised to elicit an effective and timely response against invading pathogens. Since the dynamic glycosylation processes underpinning the dramatic metamorphosis associated with myeloid progenitor-to-neutrophil differentiation remain unmapped, we here perform a comprehensive spatiotemporal profiling of the complex N-glycoproteome of isolated granule populations from blood-derived neutrophils and during maturation of bone marrow-derived progenitors using glycomics-assisted glycoproteomics. Firstly, glycomics indicated that the granule populations of mature (resting) neutrophils exhibit distinctive glycophenotypes including, most strikingly, unusual paucimannosidic- and monoantennary complex-type N-glycans in azurophilic granules. The granule-specific N-glycosylation features were recapitulated by glycoproteomics, which also uncovered extensive site- and protein-specific N-glycosylation decorating 4,772 N-glycopeptides from 352 N-glycoproteins across the neutrophil granules. Excitingly, comprehensive mining of proteomics and transcriptomics data collected from discrete myeloid progenitor stages for glycopeptide and glyco-enzyme expression revealed that dramatic glycoproteome remodelling underpins the promyelocytic-to-metamyelocyte transition and that remodelling is driven predominantly by proteome expression changes rather than modulation of the glycosylation machinery. Notable exceptions were the oligosaccharyltransferase subunits responsible for initiation of N-glycoprotein biosynthesis that were strongly reduced with myeloid differentiation leading to reduced N-glycosylation efficiency in late-stage neutrophil maturation and in corresponding granules. Our study provides new spatiotemporal insights into the dynamic neutrophil N-glycoproteome, which exhibits intriguingly complex site-, protein- and granule-specific N-glycosylation features and which undergoes strong remodelling during myeloid progenitor-to-neutrophil metamorphosis.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Neutrophil, Blood

SUBMITTER: Rebeca Kawahara  

LAB HEAD: Morten Thaysen-Andersen

PROVIDER: PXD039387 | Pride | 2023-09-18

REPOSITORIES: Pride

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Publications

Glycoproteome remodeling and organelle-specific <i>N</i>-glycosylation accompany neutrophil granulopoiesis.

Kawahara Rebeca R   Ugonotti Julian J   Chatterjee Sayantani S   Tjondro Harry C HC   Loke Ian I   Parker Benjamin L BL   Venkatakrishnan Vignesh V   Dieckmann Regis R   Sumer-Bayraktar Zeynep Z   Karlsson-Bengtsson Anna A   Bylund Johan J   Thaysen-Andersen Morten M  

Proceedings of the National Academy of Sciences of the United States of America 20230828 36


Neutrophils store microbicidal glycoproteins in cytosolic granules to fight intruding pathogens, but their granule distribution and formation mechanism(s) during granulopoiesis remain unmapped. Herein, we comprehensively profile the neutrophil <i>N</i>-glycoproteome with spatiotemporal resolution by analyzing four key types of intracellular organelles isolated from blood-derived neutrophils and during their maturation from bone marrow-derived progenitors using a glycomics-guided glycoproteomics  ...[more]

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