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Barbosa EA, Alves GSC, Coura MDMA, Silva HDLE, Rocha FSD, Nunes JB, Watanabe MDS, Andrade AC, Brand GD. A first look at the N- and O-glycosylation landscape in anuran skin secretions. Biochimie 2022; 197:19-37. [DOI: 10.1016/j.biochi.2022.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 01/08/2022] [Accepted: 01/17/2022] [Indexed: 11/26/2022]
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Heterologous expression, purification and characterization of human β-1,2-N-acetylglucosaminyltransferase II using a silkworm-based Bombyx mori nucleopolyhedrovirus bacmid expression system. J Biosci Bioeng 2018; 126:15-22. [DOI: 10.1016/j.jbiosc.2018.01.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 01/09/2018] [Accepted: 01/15/2018] [Indexed: 01/21/2023]
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Dicker M, Tschofen M, Maresch D, König J, Juarez P, Orzaez D, Altmann F, Steinkellner H, Strasser R. Transient Glyco-Engineering to Produce Recombinant IgA1 with Defined N- and O-Glycans in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:18. [PMID: 26858738 PMCID: PMC4731523 DOI: 10.3389/fpls.2016.00018] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 01/08/2016] [Indexed: 05/19/2023]
Abstract
The production of therapeutic antibodies to combat pathogens and treat diseases, such as cancer is of great interest for the biotechnology industry. The recent development of plant-based expression systems has demonstrated that plants are well-suited for the production of recombinant monoclonal antibodies with defined glycosylation. Compared to immunoglobulin G (IgG), less effort has been undertaken to express immunoglobulin A (IgA), which is the most prevalent antibody class at mucosal sites and a promising candidate for novel recombinant biopharmaceuticals with enhanced anti-tumor activity. Here, we transiently expressed recombinant human IgA1 against the VP8* rotavirus antigen in glyco-engineered ΔXT/FT Nicotiana benthamiana plants. Mass spectrometric analysis of IgA1 glycopeptides revealed the presence of complex biantennary N-glycans with terminal N-acetylglucosamine present on the N-glycosylation site of the CH2 domain in the IgA1 alpha chain. Analysis of the peptide carrying nine potential O-glycosylation sites in the IgA1 alpha chain hinge region showed the presence of plant-specific modifications including hydroxyproline formation and the attachment of pentoses. By co-expression of enzymes required for initiation and elongation of human O-glycosylation it was possible to generate disialylated mucin-type core 1 O-glycans on plant-produced IgA1. Our data demonstrate that ΔXT/FT N. benthamiana plants can be engineered toward the production of recombinant IgA1 with defined human-type N- and O-linked glycans.
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Affiliation(s)
- Martina Dicker
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life SciencesVienna, Austria
| | - Marc Tschofen
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life SciencesVienna, Austria
| | - Daniel Maresch
- Department of Chemistry, University of Natural Resources and Life SciencesVienna, Austria
| | - Julia König
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life SciencesVienna, Austria
| | - Paloma Juarez
- Institute of Molecular and Cellular Plant Biology, Spanish Research Council Agency – Polytechnic University of ValenciaValencia, Spain
| | - Diego Orzaez
- Institute of Molecular and Cellular Plant Biology, Spanish Research Council Agency – Polytechnic University of ValenciaValencia, Spain
| | - Friedrich Altmann
- Department of Chemistry, University of Natural Resources and Life SciencesVienna, Austria
| | - Herta Steinkellner
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life SciencesVienna, Austria
| | - Richard Strasser
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life SciencesVienna, Austria
- *Correspondence: Richard Strasser,
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Voglmeir J, Laurent N, Flitsch SL, Oelgeschläger M, Wilson IBH. Biological and biochemical properties of two Xenopus laevis N-acetylgalactosaminyltransferases with contrasting roles in embryogenesis. Comp Biochem Physiol B Biochem Mol Biol 2015; 180:40-7. [PMID: 25447273 PMCID: PMC4291152 DOI: 10.1016/j.cbpb.2014.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/14/2014] [Accepted: 10/16/2014] [Indexed: 12/20/2022]
Abstract
The biosynthesis of mucin-type O-linked glycans in animals is initiated by members of the large family of polypeptide N-acetylgalactosaminyltransferases (GalNAc-Ts), which play important roles in embryogenesis, organogenesis, adult tissue homeostasis and carcinogenesis. Until now, the mammalian forms of these enzymes have been the best characterized. However, two N-acetylgalactosaminyltransferases (xGalNAc-T6 and xGalNAc-T16) from the African clawed frog (Xenopus laevis), which are most homologous to those encoded by the human GALNT6 and GALNT16 (GALNTL1) genes, were shown to have contrasting roles in TGF-β/BMP signaling in embryogenesis. In this study we have examined these two enzymes further and show differences in their in vivo function during X. laevis embyrogenesis as evidenced by in situ hybridization and overexpression experiments. In terms of enzymatic activity, both enzymes were found to be active towards the EA2 peptide, but display differential activity towards a peptide based on the sequence of ActR-IIB, a receptor relevant to TGF-β/BMP signaling. In summary, these data demonstrate that these two enzymes from different branches of the N-acetylgalactosaminyltransferase do not only display differential substrate specificities, but also specific and distinct expression pattern and biological activities in vivo.
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Affiliation(s)
- Josef Voglmeir
- Department für Chemie, Universität für Bodenkultur, Wien, Austria; Manchester Interdisciplinary Biocentre, University of Manchester, UK
| | - Nicolas Laurent
- Manchester Interdisciplinary Biocentre, University of Manchester, UK
| | - Sabine L Flitsch
- Manchester Interdisciplinary Biocentre, University of Manchester, UK
| | | | - Iain B H Wilson
- Department für Chemie, Universität für Bodenkultur, Wien, Austria.
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Bencúr P, Steinkellner H, Svoboda B, Mucha J, Strasser R, Kolarich D, Hann S, Köllensperger G, Glössl J, Altmann F, Mach L. Arabidopsis thaliana beta1,2-xylosyltransferase: an unusual glycosyltransferase with the potential to act at multiple stages of the plant N-glycosylation pathway. Biochem J 2005; 388:515-25. [PMID: 15686448 PMCID: PMC1138959 DOI: 10.1042/bj20042091] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
XylT (beta1,2-xylosyltransferase) is a unique Golgi-bound glycosyltransferase that is involved in the biosynthesis of glycoprotein-bound N-glycans in plants. To delineate the catalytic domain of XylT, a series of N-terminal deletion mutants was heterologously expressed in insect cells. Whereas the first 54 residues could be deleted without affecting the catalytic activity of the enzyme, removal of an additional five amino acids led to the formation of an inactive protein. Characterization of the N-glycosylation status of recombinant XylT revealed that all three potential N-glycosylation sites of the protein are occupied by N-linked oligosaccharides. However, an unglycosylated version of the enzyme displayed substantial catalytic activity, demonstrating that N-glycosylation is not essential for proper folding of XylT. In contrast with most other glycosyltransferases, XylT is enzymatically active in the absence of added metal ions. This feature is not due to any metal ion directly associated with the enzyme. The precise acceptor substrate specificity of XylT was assessed with several physiologically relevant compounds and the xylosylated reaction products were subsequently tested as substrates of other Golgi-resident glycosyltransferases. These experiments revealed that the substrate specificity of XylT permits the enzyme to act at multiple stages of the plant N-glycosylation pathway.
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Affiliation(s)
- Peter Bencúr
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
- †Department für Chemie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Herta Steinkellner
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Barbara Svoboda
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Jan Mucha
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Richard Strasser
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Daniel Kolarich
- †Department für Chemie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Stephan Hann
- †Department für Chemie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Gunda Köllensperger
- †Department für Chemie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Josef Glössl
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Friedrich Altmann
- †Department für Chemie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
| | - Lukas Mach
- *Department für Angewandte Pflanzenwissenschaften und Pflanzenbiotechnologie, Institut für Angewandte Genetik und Zellbiologie, Universität für Bodenkultur Wien, Muthgasse 18, A-1190 Wien, Austria
- To whom correspondence should be addressed (email )
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