Protein O-Mannosylation in the murine brain: occurrence of Mono-O-Mannosyl glycans and identification of new substrates
Protein O-mannosylation is a post-translational modification essential for correct development of mammals. In humans, deficient O-mannosylation results in severe congenital muscular dystrophies often associated with impaired brain and eye development. Although various O-mannosylated proteins have be...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
November 3, 2016
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| In: |
PLOS ONE
Year: 2016, Jahrgang: 11, Heft: 11 |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0166119 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1371/journal.pone.0166119 Verlag, kostenfrei, Volltext: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166119 
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| Verfasserangaben: | Markus F. Bartels, Patrick R. Winterhalter, Jin Yu, Yan Liu, Mark Lommel, Frank Möhrlen, Huaiyu Hu, Ten Feizi, Ulrika Westerlind, Thomas Ruppert, Sabine Strahl |
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| 245 | 1 | 0 | |a Protein O-Mannosylation in the murine brain |b occurrence of Mono-O-Mannosyl glycans and identification of new substrates |c Markus F. Bartels, Patrick R. Winterhalter, Jin Yu, Yan Liu, Mark Lommel, Frank Möhrlen, Huaiyu Hu, Ten Feizi, Ulrika Westerlind, Thomas Ruppert, Sabine Strahl |
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| 520 | |a Protein O-mannosylation is a post-translational modification essential for correct development of mammals. In humans, deficient O-mannosylation results in severe congenital muscular dystrophies often associated with impaired brain and eye development. Although various O-mannosylated proteins have been identified in the recent years, the distribution of O-mannosyl glycans in the mammalian brain and target proteins are still not well defined. In the present study, rabbit monoclonal antibodies directed against the O-mannosylated peptide YAT(α1-Man)AV were generated. Detailed characterization of clone RKU-1-3-5 revealed that this monoclonal antibody recognizes O-linked mannose also in different peptide and protein contexts. Using this tool, we observed that mono-O-mannosyl glycans occur ubiquitously throughout the murine brain but are especially enriched at inhibitory GABAergic neurons and at the perineural nets. Using a mass spectrometry-based approach, we further identified glycoproteins from the murine brain that bear single O-mannose residues. Among the candidates identified are members of the cadherin and plexin superfamilies and the perineural net protein neurocan. In addition, we identified neurexin 3, a cell adhesion protein involved in synaptic plasticity, and inter-alpha-trypsin inhibitor 5, a protease inhibitor important in stabilizing the extracellular matrix, as new O-mannosylated glycoproteins. | ||
| 650 | 4 | |a Cell staining | |
| 650 | 4 | |a Cerebellum | |
| 650 | 4 | |a DAPI staining | |
| 650 | 4 | |a Extracellular matrix proteins | |
| 650 | 4 | |a Immunostaining | |
| 650 | 4 | |a Mannose | |
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