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Colpaert M, Kadouche D, Ducatez M, Pillonel T, Kebbi-Beghdadi C, Cenci U, Huang B, Chabi M, Maes E, Coddeville B, Couderc L, Touzet H, Bray F, Tirtiaux C, Ball S, Greub G, Colleoni C. Conservation of the glycogen metabolism pathway underlines a pivotal function of storage polysaccharides in Chlamydiae. Commun Biol 2021; 4:296. [PMID: 33674787 PMCID: PMC7935935 DOI: 10.1038/s42003-021-01794-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/03/2021] [Indexed: 01/31/2023] Open
Abstract
The order Chlamydiales includes obligate intracellular pathogens capable of infecting mammals, fishes and amoeba. Unlike other intracellular bacteria for which intracellular adaptation led to the loss of glycogen metabolism pathway, all chlamydial families maintained the nucleotide-sugar dependent glycogen metabolism pathway i.e. the GlgC-pathway with the notable exception of both Criblamydiaceae and Waddliaceae families. Through detailed genome analysis and biochemical investigations, we have shown that genome rearrangement events have resulted in a defective GlgC-pathway and more importantly we have evidenced a distinct trehalose-dependent GlgE-pathway in both Criblamydiaceae and Waddliaceae families. Altogether, this study strongly indicates that the glycogen metabolism is retained in all Chlamydiales without exception, highlighting the pivotal function of storage polysaccharides, which has been underestimated to date. We propose that glycogen degradation is a mandatory process for fueling essential metabolic pathways that ensure the survival and virulence of extracellular forms i.e. elementary bodies of Chlamydiales.
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Affiliation(s)
- Matthieu Colpaert
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Derifa Kadouche
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Mathieu Ducatez
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Trestan Pillonel
- Institute of Microbiology, University of Lausanne and University Hospital Center, Lausanne, Switzerland
| | - Carole Kebbi-Beghdadi
- Institute of Microbiology, University of Lausanne and University Hospital Center, Lausanne, Switzerland
| | - Ugo Cenci
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Binquan Huang
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan/School of Agriculture, Yunnan University, Kunming, China
| | - Malika Chabi
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Emmanuel Maes
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, Lille, France
| | - Bernadette Coddeville
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Loïc Couderc
- University of Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UMS 2014 - PLBS, Lille, France
| | - Hélène Touzet
- University of Lille, CNRS, Centrale Lille, UMR 9189 - CRIStAL - Centre de Recherche en Informatique Signal et Automatique de Lille, Lille, France
| | - Fabrice Bray
- University of Lille, CNRS, USR 3290-MSAP-Miniaturisation pour la Synthèse, l'Analyse et la Protéomique, Lille, France
| | - Catherine Tirtiaux
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Steven Ball
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France
| | - Gilbert Greub
- Institute of Microbiology, University of Lausanne and University Hospital Center, Lausanne, Switzerland
| | - Christophe Colleoni
- University of Lille, CNRS, UMR8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille, France.
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Delannoy C, Huang C, Coddeville B, Chen JY, Mouajjah D, Groux-Degroote S, Harduin-Lepers A, Khoo KH, Guerardel Y, Elass-Rochard E. Mycobacterium bovis BCG infection alters the macrophage N-glycome. Mol Omics 2020; 16:345-354. [PMID: 32270793 DOI: 10.1039/c9mo00173e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Macrophage glycosylation is essential to initiate the host-immune defense but may also be targeted by pathogens to promote infection. Indeed, the alteration of the cell-surface glycosylation status may affect the binding of lectins involved in cell activation and adhesion. Herein, we demonstrate that infection by M. bovis BCG induces the remodeling of the N-glycomes of both human primary blood monocyte-derived macrophages (MDM) and macrophage-cell line THP1. MALDI-MS based N-glycomic analysis established that mycobacterial infection induced increased synthesis of biantennary and multifucosylated complex type N-glycans. In contrast, infection of macrophages by M. bovis BCG did not modify the glycosphingolipids composition of macrophages. Further nano-LC-MSn glycotope-centric analysis of total N-glycans demonstrated that the increased fucosylation was due to an increased expression of the Lex (Galβ1-4[Fucα1-3]GlcNAc) epitope, also known as stage-specific embryonic antigen-1. Modification of the surface expression of Lex was further confirmed in both MDM and THP-1 cells by FACS analysis using an α1,3-linked fucose specific lectin. Activation with the mycobacterial lipopeptide Pam3Lp19, an agonist of toll-like receptor 2, did not modify the overall fucosylation pattern, which suggests that the infection process is required to modify surface glycosylation. These results pave the way toward the understanding of infection-triggered cell-surface remodeling of macrophages.
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Affiliation(s)
- Clément Delannoy
- Univ. Lille, CNRS UMR 8576, UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, 59 000 Lille, France.
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3
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Gressler M, Heddergott C, N'Go IC, Renga G, Oikonomou V, Moretti S, Coddeville B, Gaifem J, Silvestre R, Romani L, Latgé JP, Fontaine T. Definition of the Anti-inflammatory Oligosaccharides Derived From the Galactosaminogalactan (GAG) From Aspergillus fumigatus. Front Cell Infect Microbiol 2019; 9:365. [PMID: 31781511 PMCID: PMC6851199 DOI: 10.3389/fcimb.2019.00365] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 10/08/2019] [Indexed: 12/13/2022] Open
Abstract
Galactosaminogalactan (GAG) is an insoluble aminosugar polymer produced by Aspergillus fumigatus and has anti-inflammatory properties. Here, the minimum glycosidic sequences required for the induction of IL-1Ra by peripheral blood mononuclear cells (PBMCs) was investigated. Using chemical degradation of native GAG to isolate soluble oligomers, we have found that the de-N-acetylation of galactosamine residues and the size of oligomer are critical for the in vitro immune response. A minimal oligomer size of 20 galactosamine residues is required for the anti-inflammatory response but the presence of galactose residues is not necessary. In a Dextran sulfate induced colitis mouse model, a fraction of de-N-acetylated oligomers of 13 < dp < 20 rescue inflammatory damage like the native GAG polymer in an IL-1Ra dependent pathway. Our results demonstrate the therapeutic suitability of water-soluble GAG oligosaccharides in IL-1 mediated hyper-inflammatory diseases and suggest that α-1,4-galactosamine oligomers chemically synthesized could represent new anti-inflammatory glycodrugs.
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Affiliation(s)
| | | | - Inés C N'Go
- Unité des Aspergillus, Institut Pasteur, Paris, France
| | - Giorgia Renga
- Department of Experimental Medicine, Università degli Studi di Perugia, Perugia, Italy
| | - Vasilis Oikonomou
- Department of Experimental Medicine, Università degli Studi di Perugia, Perugia, Italy
| | - Silvia Moretti
- Department of Experimental Medicine, Università degli Studi di Perugia, Perugia, Italy
| | - Bernadette Coddeville
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) UMR 8576 CNRS, Université de Lille, Lille, France
| | - Joana Gaifem
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Portugal
| | - Ricardo Silvestre
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga, Portugal
| | - Luigina Romani
- Department of Experimental Medicine, Università degli Studi di Perugia, Perugia, Italy
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4
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Dumych T, Yamakawa N, Sivignon A, Garenaux E, Robakiewicz S, Coddeville B, Bongiovanni A, Bray F, Barnich N, Szunerits S, Slomianny C, Herrmann M, Gouin SG, Lutsyk AD, Munoz LE, Lafont F, Rolando C, Bilyy R, Bouckaert JMJ. Oligomannose-Rich Membranes of Dying Intestinal Epithelial Cells Promote Host Colonization by Adherent-Invasive E. coli. Front Microbiol 2018; 9:742. [PMID: 29720971 PMCID: PMC5915571 DOI: 10.3389/fmicb.2018.00742] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 03/29/2018] [Indexed: 12/13/2022] Open
Abstract
A novel mechanism is revealed by which clinical isolates of adherent-invasive Escherichia coli (AIEC) penetrate into the epithelial cell layer, replicate, and establish biofilms in Crohn's disease. AIEC uses the FimH fimbrial adhesin to bind to oligomannose glycans on the surface of host cells. Oligomannose glycans exposed on early apoptotic cells are the preferred binding targets of AIEC, so apoptotic cells serve as potential entry points for bacteria into the epithelial cell layer. Thereafter, the bacteria propagate laterally in the epithelial intercellular spaces. We demonstrate oligomannosylation at two distinct sites of a glycoprotein receptor for AIEC, carcinoembryonic antigen related cell adhesion molecule 6 (CEACAM6 or CD66c), on human intestinal epithelia. After bacterial binding, FimH interacts with CEACAM6, which then clusters. The presence of the highest-affinity epitope for FimH, oligomannose-5, on CEACAM6 is demonstrated using LC-MS/MS. As mannose-dependent infections are abundant, this mechanism might also be used by other adherent-invasive pathogens.
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Affiliation(s)
- Tetiana Dumych
- Department of Histology, Cytology and Embryology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Nao Yamakawa
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR8576 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
| | - Adeline Sivignon
- Université Clermont Auvergne, Institut National de la Santé et de la Recherche Médicale U1071, USC-INRA 2018, M2iSH, Clermont-Ferrand, France
| | - Estelle Garenaux
- Université Clermont Auvergne, Institut National de la Santé et de la Recherche Médicale U1071, USC-INRA 2018, M2iSH, Clermont-Ferrand, France
| | - Stefania Robakiewicz
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR8576 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
| | - Bernadette Coddeville
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR8576 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
| | - Antonino Bongiovanni
- Cellular Microbiology and Physics of Infection Group-Center of Infection and Immunity of Lille, Institut Pasteur de Lille, Centre National de la Recherche Scientifique UMR8204, INSERM U1019, Lille Regional Hospital University Centre, University of Lille, Lille, France
| | - Fabrice Bray
- Miniaturisation pour l'Analyse, la Synthèse et la Protéomique, USR 3290 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
| | - Nicolas Barnich
- Université Clermont Auvergne, Institut National de la Santé et de la Recherche Médicale U1071, USC-INRA 2018, M2iSH, Clermont-Ferrand, France
| | - Sabine Szunerits
- Institut Supérieur de l'Electronique et du Numérique, University of Lille, Centrale Lille, UMR 8520-IEMN, University Valenciennes, Lille, France
| | - Christian Slomianny
- Laboratoire de Physiologie Cellulaire, Institut National de la Santé et de la Recherche Médicale U.1003, University of Lille, Villeneuve d'Ascq, France
| | - Martin Herrmann
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Sébastien G Gouin
- Chimie Et Interdisciplinarité, Synthèse, Analyse, Modélisation, UMR 6230 Centre National de la Recherche Scientifique, Université Nantes Angers Le Mans (L'UNAM), Nantes, France
| | - Alexander D Lutsyk
- Department of Histology, Cytology and Embryology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Luis E Munoz
- Department of Internal Medicine 3-Rheumatology and Immunology, Friedrich-Alexander-University Erlangen-Nürnberg and Universitätsklinikum Erlangen, Erlangen, Germany
| | - Frank Lafont
- Cellular Microbiology and Physics of Infection Group-Center of Infection and Immunity of Lille, Institut Pasteur de Lille, Centre National de la Recherche Scientifique UMR8204, INSERM U1019, Lille Regional Hospital University Centre, University of Lille, Lille, France
| | - Christian Rolando
- Miniaturisation pour l'Analyse, la Synthèse et la Protéomique, USR 3290 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
| | - Rostyslav Bilyy
- Department of Histology, Cytology and Embryology, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Julie M J Bouckaert
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR8576 Centre National de la Recherche Scientifique, University of Lille, Villeneuve d'Ascq, France
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5
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Delannoy CP, Rombouts Y, Groux-Degroote S, Holst S, Coddeville B, Harduin-Lepers A, Wuhrer M, Elass-Rochard E, Guérardel Y. Glycosylation Changes Triggered by the Differentiation of Monocytic THP-1 Cell Line into Macrophages. J Proteome Res 2016; 16:156-169. [DOI: 10.1021/acs.jproteome.6b00161] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Clément P. Delannoy
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Yoann Rombouts
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Sophie Groux-Degroote
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Stephanie Holst
- Center
for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Bernadette Coddeville
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Anne Harduin-Lepers
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Manfred Wuhrer
- Center
for Proteomics and Metabolomics, Leiden University Medical Center, 2300 RC Leiden, The Netherlands
| | - Elisabeth Elass-Rochard
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
| | - Yann Guérardel
- Univ. Lille, CNRS, UMR 8576 - UGSF - Unité
de Glycobiologie Structurale et Fonctionnelle, F 59000 Lille, France
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6
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Maes E, Krzewinski F, Garenaux E, Lequette Y, Coddeville B, Trivelli X, Ronse A, Faille C, Guerardel Y. Glycosylation of BclA Glycoprotein from Bacillus cereus and Bacillus anthracis Exosporium Is Domain-specific. J Biol Chem 2016; 291:9666-77. [PMID: 26921321 DOI: 10.1074/jbc.m116.718171] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Indexed: 11/06/2022] Open
Abstract
The spores of the Bacillus cereus group (B. cereus, Bacillus anthracis, and Bacillus thuringiensis) are surrounded by a paracrystalline flexible yet resistant layer called exosporium that plays a major role in spore adhesion and virulence. The major constituent of its hairlike surface, the trimerized glycoprotein BclA, is attached to the basal layer through an N-terminal domain. It is then followed by a repetitive collagen-like neck bearing a globular head (C-terminal domain) that promotes glycoprotein trimerization. The collagen-like region of B. anthracis is known to be densely substituted by unusual O-glycans that may be used for developing species-specific diagnostics of B. anthracis spores and thus targeted therapeutic interventions. In the present study, we have explored the species and domain specificity of BclA glycosylation within the B. cereus group. First, we have established that the collagen-like regions of both B. anthracis and B. cereus are similarly substituted by short O-glycans that bear the species-specific deoxyhexose residues anthrose and the newly observed cereose, respectively. Second we have discovered that the C-terminal globular domains of BclA from both species are substituted by polysaccharide-like O-linked glycans whose structures are also species-specific. The presence of large carbohydrate polymers covering the surface of Bacillus spores may have a profound impact on the way that spores regulate their interactions with biotic and abiotic surfaces and represents potential new diagnostic targets.
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Affiliation(s)
- Emmanuel Maes
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
| | - Frederic Krzewinski
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
| | - Estelle Garenaux
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
| | | | - Bernadette Coddeville
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
| | - Xavier Trivelli
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
| | | | | | - Yann Guerardel
- From the Université de Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, F-59000 Lille, France and
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7
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Coddeville B, Wu SW, Fabre E, Brassart C, Rombouts Y, Burguière A, Kremer L, Khoo KH, Elass-Rochard E, Guérardel Y. Identification of the Mycobacterium marinum Apa antigen O-mannosylation sites reveals important glycosylation variability with the M. tuberculosis Apa homologue. J Proteomics 2012; 75:5695-705. [PMID: 22828516 DOI: 10.1016/j.jprot.2012.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/28/2012] [Accepted: 07/12/2012] [Indexed: 01/22/2023]
Abstract
The 45/47 kDa Apa, an immuno-dominant antigen secreted by Mycobacterium tuberculosis is O-mannosylated at multiple sites. Glycosylation of Apa plays a key role in colonization and invasion of the host cells by M. tuberculosis through interactions of Apa with the host immune system C-type lectins. Mycobacterium marinum (M.ma) a fish pathogen, phylogenetically close to M. tuberculosis, induces a granulomatous response with features similar to those described for M. tuberculosis in human. Although M.ma possesses an Apa homologue, its glycosylation status is unknown, and whether this represents a crucial element in the pathophysiology induced by M.ma remains to be addressed. To this aim, we have identified two concanavalin A-reactive 45/47 kDa proteins from M.ma, which have been further purified by a two-step anion exchange chromatography process. Advanced liquid chromatography-nanoESI mass spectrometry-based proteomic analyses of peptides, derived from either tryptic digestion alone or in combination with the Asp-N endoproteinase, established that M.ma Apa possesses up to seven distinct O-mannosylated sites with mainly single mannose substitutions, which can be further extended at the Ser/Thr/Pro rich region near the N-terminus. This opens the way to further studies focussing on the involvement and biological functions of Apa O-mannosylation using the M.ma/zebrafish model.
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Affiliation(s)
- Bernadette Coddeville
- Université Lille1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France
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8
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Elass-Rochard E, Rombouts Y, Coddeville B, Maes E, Blervaque R, Hot D, Kremer L, Guérardel Y. Structural determination and Toll-like receptor 2-dependent proinflammatory activity of dimycolyl-diarabino-glycerol from Mycobacterium marinum. J Biol Chem 2012; 287:34432-44. [PMID: 22798072 DOI: 10.1074/jbc.m112.378083] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although it was identified in the cell wall of several pathogenic mycobacteria, the biological properties of dimycolyl-diarabino-glycerol have not been documented yet. In this study an apolar glycolipid, presumably corresponding to dimycolyl-diarabino-glycerol, was purified from Mycobacterium marinum and subsequently identified as a 5-O-mycolyl-β-Araf-(1→2)-5-O-mycolyl-α-Araf-(1→1')-glycerol (designated Mma_DMAG) using a combination of nuclear magnetic resonance spectroscopy and mass spectrometry analyses. Lipid composition analysis revealed that mycolic acids were dominated by oxygenated mycolates over α-mycolates and devoid of trans-cyclopropane functions. Highly purified Mma_DMAG was used to demonstrate its immunomodulatory activity. Mma_DMAG was found to induce the secretion of proinflammatory cytokines (TNF-α, IL-8, IL-1β) in human macrophage THP-1 cells and to trigger the expression of ICAM-1 and CD40 cell surface antigens. This activation mechanism was dependent on TLR2, but not on TLR4, as demonstrated by (i) the use of neutralizing anti-TLR2 and -TLR4 antibodies and by (ii) the detection of secreted alkaline phosphatase in HEK293 cells co-transfected with the human TLR2 and secreted embryonic alkaline phosphatase reporter genes. In addition, transcriptomic analyses indicated that various genes encoding proinflammatory factors were up-regulated after exposure of THP-1 cells to Mma_DMAG. Importantly, a wealth of other regulated genes related to immune and inflammatory responses, including chemokines/cytokines and their respective receptors, adhesion molecules, and metalloproteinases, were found to be modulated by Mma_DMAG. Overall, this study suggests that DMAG may be an active cell wall glycoconjugate driving host-pathogen interactions and participating in the immunopathogenesis of mycobacterial infections.
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Affiliation(s)
- Elisabeth Elass-Rochard
- Université Lille Nord de France, Université Lille1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, IFR 147, France.
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9
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Mille C, Fradin C, Delplace F, Trinel PA, Masset A, François N, Coddeville B, Bobrowicz P, Jouault T, Guerardel Y, Wildt S, Janbon G, Poulain D. Members 5 and 6 of the Candida albicans BMT family encode enzymes acting specifically on β-mannosylation of the phospholipomannan cell-wall glycosphingolipid. Glycobiology 2012; 22:1332-42. [PMID: 22745283 DOI: 10.1093/glycob/cws097] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A family of nine genes encoding proteins involved in the synthesis of β-1,2 mannose adhesins of Candida albicans has been identified. Four of these genes, BMT1-4, encode enzymes acting stepwise to add β-mannoses on to cell-wall phosphopeptidomannan (PPM). None of these acts on phospholipomannan (PLM), a glycosphingolipid member of the mannose-inositol-phosphoceramide family, which contributes with PPM to β-mannose surface expression. We show that deletion of BMT5 and BMT6 led to a dramatic reduction of PLM glycosylation and accumulation of PLM with a truncated β-oligomannoside chain, respectively. Disruptions had no effect on sphingolipid biosynthesis and on PPM β-mannosylation. β-Mannose surface expression was not affected, confirming that β-mannosylation is a process based on specificity of acceptor molecules, but liable to global regulation.
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10
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Rombouts Y, Brust B, Ojha AK, Maes E, Coddeville B, Elass-Rochard E, Kremer L, Guerardel Y. Exposure of mycobacteria to cell wall-inhibitory drugs decreases production of arabinoglycerolipid related to Mycolyl-arabinogalactan-peptidoglycan metabolism. J Biol Chem 2012; 287:11060-9. [PMID: 22315220 DOI: 10.1074/jbc.m111.327387] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The "cell wall core" consisting of a mycolyl-arabinogalactan-peptidoglycan (mAGP) complex represents the hallmark of the mycobacterial cell envelope. It has been the focus of intense research at both structural and biosynthetic levels during the past few decades. Because it is essential, mAGP is also regarded as a target for several antitubercular drugs. Herein, we demonstrate that exposure of Mycobacterium bovis Bacille Calmette-Guérin or Mycobacterium marinum to thiacetazone, a second line antitubercular drug, is associated with a severe decrease in the level of a major apolar glycolipid. This inhibition requires MmaA4, a methyltransferase reported to participate in the activation process of thiacetazone. Following purification, this glycolipid was subjected to detailed structural analyses, combining gas-liquid chromatography, mass spectrometry, and nuclear magnetic resonance. This allowed to identify it as a 5-O-mycolyl-β-Araf-(1→2)-5-O-mycolyl-α-Araf-(1→1)-Gro, designated dimycolyl diarabinoglycerol (DMAG). The presence of DMAG was subsequently confirmed in other slow growing pathogenic species, including Mycobacterium tuberculosis. DMAG production was stimulated in the presence of exogenous glycerol. Interestingly, DMAG appears structurally identical to the terminal portion of the mycolylated arabinosyl motif of mAGP, and the metabolic relationship between these two components was provided using antitubercular drugs such as ethambutol or isoniazid known to inhibit the biosynthesis of arabinogalactan or mycolic acid, respectively. Finally, DMAG was identified in the cell wall of M. tuberculosis. This opens the possibility of a potent biological function for DMAG that may be important to mycobacterial pathogenesis.
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Affiliation(s)
- Yoann Rombouts
- Université Lille Nord de France, Université Lille 1, Unité de Glycobiologie Structurale et Fonctionnelle (UGSF), F-59650 Villeneuve d'Ascq, France
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Niehus S, Elass E, Coddeville B, Guérardel Y, Schwarz RT, Debierre-Grockiego F. Glycosylphosphatidylinositols of Toxoplasma gondii induce matrix metalloproteinase-9 production and degradation of galectin-3. Immunobiology 2012; 217:61-4. [DOI: 10.1016/j.imbio.2011.08.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Revised: 08/04/2011] [Accepted: 08/05/2011] [Indexed: 11/25/2022]
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Fontaine T, Delangle A, Simenel C, Coddeville B, van Vliet SJ, van Kooyk Y, Bozza S, Moretti S, Schwarz F, Trichot C, Aebi M, Delepierre M, Elbim C, Romani L, Latgé JP. Galactosaminogalactan, a new immunosuppressive polysaccharide of Aspergillus fumigatus. PLoS Pathog 2011; 7:e1002372. [PMID: 22102815 PMCID: PMC3213105 DOI: 10.1371/journal.ppat.1002372] [Citation(s) in RCA: 157] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Accepted: 09/27/2011] [Indexed: 01/24/2023] Open
Abstract
A new polysaccharide secreted by the human opportunistic fungal pathogen Aspergillus fumigatus has been characterized. Carbohydrate analysis using specific chemical degradations, mass spectrometry, 1H and 13C nuclear magnetic resonance showed that this polysaccharide is a linear heterogeneous galactosaminogalactan composed of α1-4 linked galactose and α1-4 linked N-acetylgalactosamine residues where both monosacharides are randomly distributed and where the percentage of galactose per chain varied from 15 to 60%. This polysaccharide is antigenic and is recognized by a majority of the human population irrespectively of the occurrence of an Aspergillus infection. GalNAc oligosaccharides are an essential epitope of the galactosaminogalactan that explains the universal antibody reaction due to cross reactivity with other antigenic molecules containing GalNAc stretches such as the N-glycans of Campylobacter jejuni. The galactosaminogalactan has no protective effect during Aspergillus infections. Most importantly, the polysaccharide promotes fungal development in immunocompetent mice due to its immunosuppressive activity associated with disminished neutrophil infiltrates. Aspergillus fumigatus is an opportunistic human fungal pathogen that causes a wide range of diseases including allergic reactions and local or systemic infections such as invasive pulmonary aspergillosis that has emerged in the recent years as a leading cause of infection related mortality among immunocompromised patients. Polysaccharides from the fungal cell wall play essential biological functions in the fungal cell biology and in host-pathogen interactions. Indeed, it has been shown that polysaccharides can modulate the human immune response; some of them (β-glucan and α-glucans) having a protective effect against Aspergillus infection. We report here the purification and chemical characterization of a new antigenic polysaccharide (galactosaminogalactan) produced by A. fumigatus. This polymer is secreted during infection. In murine models of aspergillosis, this galactosaminogalactan is not protective but it is immunosuppressive and favors A. fumigatus infection. Particularly it induces the apoptotic death of neutrophils that are the phagocytes playing an essential role in the killing of fungal pathogens.
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Guérardel Y, Chang LY, Fujita A, Coddeville B, Maes E, Sato C, Harduin-Lepers A, Kubokawa K, Kitajima K. Sialome analysis of the cephalochordate Branchiostoma belcheri, a key organism for vertebrate evolution. Glycobiology 2011; 22:479-91. [PMID: 22057003 DOI: 10.1093/glycob/cwr155] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Sialic acid, a common terminal substitution of glycoconjugates, has been so far consistently identified in all vertebrates as well as in a growing number of bacterial species. It is assumed to be widely distributed among animal species of the deuterostome phylum, based on its identification in few echinoderm and all vertebrate species. However, whole sections of deuterostome, especially those intermediate species between invertebrates and vertebrates including cephalochordates, urochordates and hemichordates, are still unexplored in term of sialylation capacities. The discovery of functional sialic acid machinery in some of these species may shed new light onto the evolution of glycosylation capacities in deuterostome lineage. In a first approach, we investigated the sialylation pattern of a cephalocordate species, Branchiostoma belcheri, which occupies a strategic phylogenetic position to understand the transition of invertebrates toward vertebrates. Structural analysis of B. belcheri glycoconjugates established that this organism synthesizes large quantities of various sialic acids, some of which present rare or novel structures such as methylated sialic acids. These sialic acids were shown to be mainly associated with mono- and disialylated core 1-type O-glycans. Moreover, screening of the animal organs revealed the existence of exquisite tissue specificity in the distribution of sialic acids. Description of sialylation profiles was then correlated with the expression patterns of key enzymes involved in the biosynthesis of major forms of sialic acids, which provides the first complete overview of the sialylation patterns in cephalochordates.
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Affiliation(s)
- Yann Guérardel
- Université de Lille 1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France.
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Losfeld ME, Leroy A, Coddeville B, Carpentier M, Mazurier J, Legrand D. N-Glycosylation influences the structure and self-association abilities of recombinant nucleolin. FEBS J 2011; 278:2552-64. [PMID: 21575138 DOI: 10.1111/j.1742-4658.2011.08180.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nucleolin is a major nucleolar protein involved in fundamental processes of ribosome biogenesis, regulation of cell proliferation and growth. Nucleolin is known to shuttle between nucleus, cytoplasm and cell surface. We have previously found that nucleolin undergoes complex N- and O-glycosylations in extra-nuclear isoforms. We found that surface nucleolin is exclusively glycosylated and that N-glycosylation is required for its expression on the cells. Interestingly, the two N-glycans are located in the RNA-binding domains (RBDs) which participate in the self-association properties of nucleolin. We hypothesized that the occupancy of RBDs by N-glycans plays a role in these self-association properties. Here, owing to the inability to quantitatively produce full-size nucleolin, we expressed four N-glycosylation nucleolin variants lacking the N-terminal acidic domain in a baculovirus/insect cell system. As assessed by heptafluorobutyrate derivatization and mass spectrometry, this strategy allowed the production of proteins bearing or not paucimannosidic-type glycans on either one or two of the potential N-glycosylation sites. Their structure was investigated by circular dichroism and fluorimetry, and their ability to self-interact was analyzed by electrophoresis and surface plasmon resonance. Our results demonstrate that all nucleolin-derived variants are able to self-interact and that N-glycosylation on both RBD1 and RBD3, or RBD3 alone, but not RBD1 alone, modifies the structure of the N-terminally truncated nucleolin and enhances its self-association properties. In contrast, N-glycosylation does not modify interaction with lactoferrin, a ligand of cell surface nucleolin. Our results suggest that the occupancy of the N-glycosylation sites may contribute to expression and functions of surface nucleolin.
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Coddeville B, Maes E, Ferrier-Pagès C, Guerardel Y. Glycan Profiling of Gel Forming Mucus Layer from the Scleractinian Symbiotic Coral Oculina arbuscula. Biomacromolecules 2011; 12:2064-73. [DOI: 10.1021/bm101557v] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Bernadette Coddeville
- Université de Lille1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France
- CNRS, UMR 8576, F-59650 Villeneuve d'Ascq, France
| | - Emmanuel Maes
- Université de Lille1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France
- CNRS, UMR 8576, F-59650 Villeneuve d'Ascq, France
| | - Christine Ferrier-Pagès
- Centre Scientifique de Monaco, c/o Musée Océanographique, Avenue Saint Martin, MC-98000 Monaco
| | - Yann Guerardel
- Université de Lille1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France
- CNRS, UMR 8576, F-59650 Villeneuve d'Ascq, France
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Rossez Y, Coddeville B, Elass E, Quinchon JF, Vidal O, Corfield AP, Gosset P, Lacroix JM, Michalski JC, Robbe-Masselot C. Interaction between DMBT1 and galectin 3 is modulated by the structure of the oligosaccharides carried by DMBT1. Biochimie 2010; 93:593-603. [PMID: 21167898 DOI: 10.1016/j.biochi.2010.12.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Accepted: 12/06/2010] [Indexed: 11/29/2022]
Abstract
DMBT1 (deleted in malignant brain tumor 1), a human mucin-like glycoprotein, belonging to the scavenger receptor cysteine-rich (SRCR) superfamily, is mainly secreted from mucosal epithelia. It has been shown previously that interaction of hensin, the rabbit ortholog of DMBT1, with galectin 3, a β-galactoside-binding lectin, induces a terminal differentiation of epithelial cells. In this paper, we have used surface plasmon resonance (SPR), to analyse the binding of galectin 3 to two purified samples of human DMBT1:recombinant DMBT1 produced in CHO cells and DMBT1 isolated from intestinal tissues. Characterization of their glycosylation profile by nano-ESI-Q-TOF tandem mass spectrometry showed significant differences in O-glycans between the two DMBT1 samples. Results obtained by SPR demonstrated that the oligosaccharide side chains of DMBT1 are recognized by the carbohydrate-recognition domain (CRD) of galectin 3 and modification in the pattern of oligosaccharides modulates the binding parameters of DMBT1 with galectin 3. Moreover, using immunohistochemistry on paraffin-embedded colonic tissue sections, we could show a co-localisation of DMBT1 and galectin 3 in human intestine, suggesting a potential physiological interaction.
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Rombouts Y, Elass E, Biot C, Maes E, Coddeville B, Burguière A, Tokarski C, Buisine E, Trivelli X, Kremer L, Guérardel Y. Structural analysis of an unusual bioactive N-acylated lipo-oligosaccharide LOS-IV in Mycobacterium marinum. J Am Chem Soc 2010; 132:16073-84. [PMID: 20964371 DOI: 10.1021/ja105807s] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Although lipo-oligosaccharides (LOSs) are recognized as major parietal components in many mycobacterial species, their involvement in the host-pathogen interactions have been scarcely documented. In particular, the biological implications arising from the high degree of structural species-specificity of these glycolipids remain largely unknown. Growing recognition of the Mycobacterium marinum-Danio rerio as a specific host-pathogen model devoted to the study of the physiopathology of mycobacterial infections prompted us to elucidate the structure-to-function relationships of the elusive end-product, LOS-IV, of the LOS biosynthetic pathway in M. marinum. Combination of physicochemical and molecular modeling methods established that LOS-IV resulted from the differential transfer on the caryophyllose-containing LOS-III of a family of very unusual N-acylated monosaccharides, naturally present as different diastereoisomers. In agreement with the partial loss of pathogenecity previously reported in a LOS-IV-deficient M. marinum mutant, we demonstrated that this terminal monosaccharide conferred to LOS-IV important biological functions, including macrophage activating properties.
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Affiliation(s)
- Yoann Rombouts
- Université de Lille 1, Unité de Glycobiologie Structurale et Fonctionnelle, UGSF, F-59650 Villeneuve d'Ascq, France
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Chambers MA, Whelan AO, Spallek R, Singh M, Coddeville B, Guerardel Y, Elass E. Non-acylated Mycobacterium bovis glycoprotein MPB83 binds to TLR1/2 and stimulates production of matrix metalloproteinase 9. Biochem Biophys Res Commun 2010; 400:403-8. [PMID: 20800577 DOI: 10.1016/j.bbrc.2010.08.085] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 08/18/2010] [Indexed: 11/25/2022]
Abstract
A variety of Mycobacterium tuberculosis cell wall components induce expression of matrix metalloproteinase 9 (MMP-9) by monocytic cells and levels of MMP-9 in vivo positively correlate with severity of disease. Toll-like receptor (TLR)2 mediates cellular responses to acylated molecules but can also mediate responsiveness to diverse molecular structures, including non-acylated native viral and bacterial proteins. MPT/B-83 is a cell-associated lipoglycoprotein common to M. tuberculosis and M. bovis and an important antigen during infection of cattle. Since MPB83 is acylated and glycosylated, we investigated whether MPB83 would induce MMP-9 expression via interaction with TLR2, and assessed the contribution of the lipid, glycan and polypeptide components to its activity. Acylated peptide derived from MPB83 stimulated MMP-9 expression by human macrophage cells via interaction with both TLR2 and TLR1, but not TLR4. Lesser induction was found with secreted (non-acylated, but glycosylated) MPB83 protein purified from culture of M. bovis. Stimulation of cells with MPB83 induced TNF-α production which acted to upregulate MMP-9 expression. Surprisingly, recombinant MPB83 protein devoid of any post-translational modification also induced MMP-9 expression. Direct interaction of RecMPB83 with TLR2 was demonstrated by surface plasmon-resonance. MPB83 may act as a virulence factor through TLR2 mediated induction of MMP-9.
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Affiliation(s)
- Mark A Chambers
- TB Research Group, Department of Bacteriology, Veterinary Laboratories Agency Weybridge, Addlestone, Surrey KT15, UK.
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Debierre-Grockiego F, Niehus S, Coddeville B, Elass E, Poirier F, Weingart R, Schmidt RR, Mazurier J, Guérardel Y, Schwarz RT. Binding of Toxoplasma gondii glycosylphosphatidylinositols to galectin-3 is required for their recognition by macrophages. J Biol Chem 2010; 285:32744-32750. [PMID: 20729207 DOI: 10.1074/jbc.m110.137588] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We showed that the production of tumor necrosis factor (TNF) α by macrophages in response to Toxoplasma gondii glycosylphosphatidylinositols (GPIs) requires the expression of both Toll-like receptors TLR2 and TLR4, but not of their co-receptor CD14. Galectin-3 is a β-galactoside-binding protein with immune-regulatory effects, which associates with TLR2. We demonstrate here by using the surface plasmon resonance method that the GPIs of T. gondii bind to human galectin-3 with strong affinity and in a dose-dependent manner. The use of a synthetic glycan and of the lipid moiety cleaved from the GPIs shows that both parts are involved in the interaction with galectin-3. GPIs of T. gondii also bind to galectin-1 but with a lower affinity and only through the lipid moiety. At the cellular level, the production of TNF-α induced by T. gondii GPIs in macrophages depends on the expression of galectin-3 but not of galectin-1. This study is the first identification of a galectin-3 ligand of T. gondii origin, and galectin-3 might be a co-receptor presenting the GPIs to the TLRs on macrophages.
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Affiliation(s)
- Françoise Debierre-Grockiego
- From the Institut für Virologie, AG Parasitologie, Philipps University, Marburg D-35043, Germany; Unité Mixte de Recherche Université-Institut National de la Recherche Agronomique 0483 Immunologie Parasitaire, Vaccinologie et Biothérapies Anti-infectieuses, Unité de Formation de Recherche Sciences Pharmaceutiques, 31 Avenue Monge, F-37200 Tours, France.
| | - Sebastian Niehus
- From the Institut für Virologie, AG Parasitologie, Philipps University, Marburg D-35043, Germany
| | - Bernadette Coddeville
- CNRS-Unité Mixte de Recherche 8576, Unit of Structural and Functional Glycobiology, Institut Fédératif de Recherche 147, Université Lille Nord de France, F-59000 Lille, France
| | - Elisabeth Elass
- CNRS-Unité Mixte de Recherche 8576, Unit of Structural and Functional Glycobiology, Institut Fédératif de Recherche 147, Université Lille Nord de France, F-59000 Lille, France
| | - Françoise Poirier
- Laboratoire de Génétique et Développement des Mammifères, Institut Jacques Monod, Paris F-75013, France
| | - Ralf Weingart
- Fachbereich Chemie, University of Konstanz, Konstanz D-78457, Germany
| | - Richard R Schmidt
- Fachbereich Chemie, University of Konstanz, Konstanz D-78457, Germany
| | - Joël Mazurier
- CNRS-Unité Mixte de Recherche 8576, Unit of Structural and Functional Glycobiology, Institut Fédératif de Recherche 147, Université Lille Nord de France, F-59000 Lille, France
| | - Yann Guérardel
- CNRS-Unité Mixte de Recherche 8576, Unit of Structural and Functional Glycobiology, Institut Fédératif de Recherche 147, Université Lille Nord de France, F-59000 Lille, France
| | - Ralph T Schwarz
- From the Institut für Virologie, AG Parasitologie, Philipps University, Marburg D-35043, Germany; CNRS-Unité Mixte de Recherche 8576, Unit of Structural and Functional Glycobiology, Institut Fédératif de Recherche 147, Université Lille Nord de France, F-59000 Lille, France
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Gastebois A, Mouyna I, Simenel C, Clavaud C, Coddeville B, Delepierre M, Latgé JP, Fontaine T. Characterization of a new beta(1-3)-glucan branching activity of Aspergillus fumigatus. J Biol Chem 2010; 285:2386-96. [PMID: 19948732 PMCID: PMC2807297 DOI: 10.1074/jbc.m109.077545] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Revised: 11/24/2009] [Indexed: 11/06/2022] Open
Abstract
A new HPLC method was developed to separate linear from beta(1-6)-branched beta(1-3)-glucooligosaccharides. This methodology has permitted the isolation of the first fungal beta(1-6)/beta(1-3)-glucan branching transglycosidase using a cell wall autolysate of Aspergillus fumigatus (Af). The encoding gene, AfBGT2 is an ortholog of AfBGT1, another transglycosidase of A. fumigatus previously analyzed (Mouyna, I., Hartland, R. P., Fontaine, T., Diaquin, M., Simenel, C., Delepierre, M., Henrissat, B., and Latgé, J. P. (1998) Microbiology 144, 3171-3180). Both enzymes release laminaribiose from the reducing end of a beta(1-3)-linked oligosaccharide and transfer the remaining chain to another molecule of the original substrate. The AfBgt1p transfer occurs at C-6 of the non-reducing end group of the acceptor, creating a kinked beta(1-3;1-6) linear molecule. The AfBgt2p transfer takes place at the C-6 of an internal group of the acceptor, resulting in a beta(1-3)-linked product with a beta(1-6)-linked side branch. The single Afbgt2 mutant and the double Afbgt1/Afbgt2 mutant in A. fumigatus did not display any cell wall phenotype showing that these activities were not responsible for the construction of the branched beta(1-3)-glucans of the cell wall.
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Affiliation(s)
- Amandine Gastebois
- From the Unité des Aspergillus, Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris
| | - Isabelle Mouyna
- From the Unité des Aspergillus, Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris
| | - Catherine Simenel
- the Unité de Résonance Magnétique Nucléaire des Biomolécules, CNRS URA 2185, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris Cedex 15, and
| | - Cécile Clavaud
- From the Unité des Aspergillus, Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris
| | - Bernadette Coddeville
- the Laboratoire de Glycobiologie Structurale et Fonctionnelle, UMR 8576 CNRS, Université des Sciences et Technologies de Lille Flandres-Artois, 59655 Villeneuve d'Ascq Cedex, France
| | - Muriel Delepierre
- the Unité de Résonance Magnétique Nucléaire des Biomolécules, CNRS URA 2185, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris Cedex 15, and
| | - Jean-Paul Latgé
- From the Unité des Aspergillus, Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris
| | - Thierry Fontaine
- From the Unité des Aspergillus, Institut Pasteur, 25 rue du Docteur Roux, 75015 Paris
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Fontaine T, Lamarre C, Simenel C, Lambou K, Coddeville B, Delepierre M, Latgé JP. Characterization of glucuronic acid containing glycolipid in Aspergillus fumigatus mycelium. Carbohydr Res 2009; 344:1960-7. [DOI: 10.1016/j.carres.2009.07.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 07/24/2009] [Accepted: 07/29/2009] [Indexed: 12/31/2022]
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Debray H, Coddeville B, Bomfim LR, Ramos MV. A simple micro-method for determining precise oligosaccharidic specificity of mannose-binding lectins. Glycobiology 2009; 19:1417-26. [DOI: 10.1093/glycob/cwp091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rombouts Y, Burguière A, Maes E, Coddeville B, Elass E, Guérardel Y, Kremer L. Mycobacterium marinum lipooligosaccharides are unique caryophyllose-containing cell wall glycolipids that inhibit tumor necrosis factor-alpha secretion in macrophages. J Biol Chem 2009; 284:20975-88. [PMID: 19491094 DOI: 10.1074/jbc.m109.011429] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Earlier studies have reported a role for lipooligosaccharides (LOSs) in sliding motility, biofilm formation, and infection of host macrophages in Mycobacterium marinum. Although a LOS biosynthetic gene cluster has recently been identified in this species, many structural features of the different LOSs (LOS-I-IV) are still unknown. This clearly hampers assessing the contribution of each LOS in mycobacterial virulence as well as structure-function-based studies of these important cell wall-associated glycolipids. In this study, we have identified an M. marinum isolate, M. marinum 7 (Mma7), which failed to produce LOS-IV but instead accumulated large amounts of LOS-III. Local genomic comparison of the LOS biosynthetic cluster established the presence of a highly disorganized region in Mma7 compared with the standard M strain, characterized by multiple genetic lesions that are likely to be responsible for the defect in LOS-IV production in Mma7. Our results indicate that the glycosyltransferase LosA alone is not sufficient to ensure LOS-IV biosynthesis. The availability of different M. marinum strains allowed us to determine the precise structure of individual LOSs through the combination of mass spectrometric and NMR techniques. In particular, we established the presence of two related 4-C-branched monosaccharides within LOS-II to IV sequences, of which one was never identified before. In addition, we provided evidence that LOSs are capable of inhibiting the secretion of tumor necrosis factor-alpha in lipopolysaccharide-stimulated human macrophages. This unexpected finding suggests that these cell wall-associated glycolipids represent key effectors capable of interfering with the establishment of a pro-inflammatory response.
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Affiliation(s)
- Yoann Rombouts
- Unité de Glycobiologie Structurale et Fonctionnelle, CNRS UMR 8576, IFR 147, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France
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Schauer R, Srinivasan GV, Coddeville B, Zanetta JP, Guérardel Y. Low incidence of N-glycolylneuraminic acid in birds and reptiles and its absence in the platypus. Carbohydr Res 2009; 344:1494-500. [PMID: 19541293 DOI: 10.1016/j.carres.2009.05.020] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2009] [Revised: 05/18/2009] [Accepted: 05/20/2009] [Indexed: 01/14/2023]
Abstract
The sialic acids of the platypus, birds, and reptiles were investigated with regard to the occurrence of N-glycolylneuraminic (Neu5Gc) acid. They were released from tissues, eggs, or salivary mucin samples by acid hydrolysis, and purified and analyzed by thin-layer chromatography, high-performance liquid chromatography, and mass spectrometry. In muscle and liver of the platypus only N-acetylneuraminic (Neu5Ac) acid was found. The nine bird species studied also did not express N-glycolylneuraminic acid with the exception of an egg, but not tissues, from the budgerigar and traces in poultry. Among nine reptiles, including one turtle, N-glycolylneuraminic acid was only found in the egg and an adult basilisk, but not in a freshly hatched animal. BLAST analysis of the genomes of the platypus, the chicken, and zebra finch against the CMP-N-acetylneuraminic acid hydroxylase did not reveal the existence of a similar protein structure. Apparently monotremes (platypus) and sauropsids (birds and reptiles) cannot synthesize Neu5Gc. The few animals where Neu5Gc was found, especially in eggs, may have acquired this from the diet or by an alternative pathway. Since Neu5Gc is antigenic to man, the observation that this monosaccharide does not or at least only rarely occur in birds and reptiles, may be of nutritional and clinical significance.
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Affiliation(s)
- Roland Schauer
- Biochemisches Institut, Christian-Albrechts-Universität zu Kiel, Olshausenstr. 40, D-24098 Kiel, Germany.
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Elass E, Coddeville B, Kremer L, Mortuaire M, Mazurier J, Guérardel Y. Mycobacterial lipomannan induces MAP kinase phosphatase-1 expression in macrophages. FEBS Lett 2008; 582:445-50. [PMID: 18201568 DOI: 10.1016/j.febslet.2008.01.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 12/19/2007] [Accepted: 01/03/2008] [Indexed: 10/22/2022]
Abstract
Mycobacterial lipomannan (LM) and lipoarabinomannan (LAM) regulate macrophage activation by interacting with Toll-like receptors (TLRs). The intracellular signalling pathways elicited by these complex molecules are poorly defined. We have demonstrated that LM purified from various mycobacterial species, but not LAM from Mycobacterium kansasii or Mycobacterium bovis BCG, induced expression of the MAP kinase phosphatase 1 (MKP-1) in macrophages. Anti-TLR2 antibodies, as well as specific ERK and p38 MAPK inhibitors, decreased MKP-1 transcription in LM-stimulated cells. These findings suggest that the binding of LM to TLR2 triggers MAPK activation, followed by an up-regulation of MKP-1 expression, which in turn may act as a negative regulator of MAPK activation.
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Affiliation(s)
- Elisabeth Elass
- Unité de Glycobiologie Structurale et Fonctionnelle, Université des Sciences et Technologies de Lille, UMR CNRS 8576, IFR 147, 59655 Villeneuve d'Ascq Cedex, France.
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Simenel C, Coddeville B, Delepierre M, Latge JP, Fontaine T. Glycosylinositolphosphoceramides in Aspergillus Fumigatus. Glycobiology 2007; 18:84-96. [DOI: 10.1093/glycob/cwm122] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Maes E, Coddeville B, Kremer L, Guérardel Y. Polysaccharide structural variability in mycobacteria: identification and characterization of phosphorylated mannan and arabinomannan. Glycoconj J 2007; 24:439-48. [PMID: 17510794 DOI: 10.1007/s10719-007-9036-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 03/16/2007] [Accepted: 04/04/2007] [Indexed: 10/23/2022]
Abstract
Arabinomannan (AMannan) and mannan (Mannan) are major polysaccharides antigens of the mycobacterial capsule. They are highly related to the lipoarabinomannan (LAM) and lipomannan (LM) lipoglycans of the cell wall, known to participate to the immunopathogenesis of mycobacterial infections. Here we present the identification of two related polysaccharides from Mycobacterium kansasii that co-purified with AMannan and Mannan. Structural analysis using GC, MALDI-MS and NMR clearly established these molecules as non-acylated phosphorylated AMannan and Mannan designated P-AMannan and P-Mannan, respectively. These glycoconjugates represent a new source of polysaccharide structural variability in mycobacteria and constitute unique tools for structure-activity relationship studies in order to investigate the role of fatty acids in the biological functions of LAM and LM. The potential participation of these polysaccharides in influencing the outcome of the infection is also discussed.
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Affiliation(s)
- Emmanuel Maes
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR 8576 CNRS, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq cedex, France
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Elass E, Coddeville B, Guérardel Y, Kremer L, Maes E, Mazurier J, Legrand D. Identification by surface plasmon resonance of the mycobacterial lipomannan and lipoarabinomannan domains involved in binding to CD14 and LPS-binding protein. FEBS Lett 2007; 581:1383-90. [PMID: 17350002 DOI: 10.1016/j.febslet.2007.02.056] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2007] [Revised: 02/14/2007] [Accepted: 02/19/2007] [Indexed: 11/28/2022]
Abstract
The mycobacterial lipoglycans, lipomannan (LM) and lipoarabinomannan (LAM), regulate host defence mechanisms through their interaction with pattern recognition receptors such as Toll-like receptors (TLRs). We have developed a surface plasmon resonance assay to analyse the molecular basis for the recognition of Mycobacterium kansasii LM or LAM, by immobilized CD14 and LPS-binding protein (LBP) both being capable to promote presentation of bacterial glycolipids to TLRs. The affinity of either LM/LAM was higher to CD14 than to LBP. Kinetic and Scatchard analyses were consistent with a model involving a single class of binding sites. These interactions required the lipidic anchor, but not the carbohydrate domains, of LM or LAM. We also provide evidence that addition of recombinant LBP enhanced the stimulatory effect of LM or LAM on matrix metalloproteinase-9 expression and secretion in macrophages, through a TLR1/TLR2-dependent mechanism.
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Affiliation(s)
- Elisabeth Elass
- Unité Mixte de Recherche n 8576 du Centre National de la Recherche Scientifique, Institut Fédératif de Recherche 147, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France.
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Trinel PA, Delplace F, Maes E, Zanetta JP, Mille C, Coddeville B, Jouault T, Strecker G, Poulain D. Candida albicans serotype B strains synthesize a serotype-specific phospholipomannan overexpressing a beta-1,2-linked mannotriose. Mol Microbiol 2006; 58:984-98. [PMID: 16262785 DOI: 10.1111/j.1365-2958.2005.04890.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Candida albicans strains consist of serotypes A and B depending on the presence of terminal beta-1,2-linked mannose residues in the acid-stable part of serotype A phosphopeptidomannan (PPM). The distribution of C. albicans serotypes varies according to country and human host genetic and infectious backgrounds. However, these epidemiological traits have not yet been related to a phenotypically stable molecule as cell surface expression of the serotype A epitope depends on the growth conditions. We have shown that C. albicans serotype A associates beta-mannose residues with another molecule, phospholipomannan (PLM), which is a member of the mannoseinositolphosphoceramide family. In this study, PLM from serotype B strains was analysed in order to provide structural bases for the differences in molecular mass and antigenicity observed between PLMs from both serotypes. Through these analyses, carbon 10 was shown to be the location of a second hydroxylation of fatty acids previously unknown in fungal sphingolipids. Minor differences observed in the ceramide moiety appeared to be strain-dependent. More constant features of PLM from serotype B strains were the incorporation of greater amounts of phytosphingosine C20, a twofold reduced glycosylation of PLM and overexpression of a beta-1,2 mannotriose, the epitope of protective antibodies. This specific beta-mannosylation was observed even when growth conditions altered serotype A PPM-specific epitopes, confirming the potential of PLM as a phenotypically stable molecule for serotyping. This study also suggests that the regulation of beta-mannosyltransferases, which define specific immunomodulatory adhesins whose activity depends on the mannosyl chain length, are part of the genetic background that differentiates serotypes.
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Affiliation(s)
- Pierre-André Trinel
- Inserm E0360, Physiopathologie des Candidoses, Faculté de Médecine, Pôle Recherche, 59037, Lille Cedex, France
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Abstract
Galactomannan is a characteristic polysaccharide of the human filamentous fungal pathogen Aspergillus fumigatus that can be used to diagnose invasive aspergillosis. In this study, we report the isolation of a galactomannan fraction associated to membrane preparations from A. fumigatus mycelium by a lipid anchor. Specific chemical and enzymatic degradations and mass spectrometry analysis showed that the lipid anchor is a glycosylphosphatidylinositol (GPI). The lipid part is an inositol phosphoceramide containing mainly C18-phytosphingosine and monohydroxylated lignoceric acid (2OH-C(24:0) fatty acid). GPI glycan is a tetramannose structure linked to a glucosamine residue: Manalpha1-2Manalpha1-2Manalpha1-6Manalpha1-4GlcN. The galactomannan polymer is linked to the GPI structure through the mannan chain. The GPI structure is a type 1, closely related to the one previously described for the GPI-anchored proteins of A. fumigatus. This is the first time that a fungal polysaccharide is shown to be GPI-anchored.
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Affiliation(s)
- Corina Costachel
- Unité des Aspergillus, Institut Pasteur, 75724 Paris cedex 15, France
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Robbe C, Capon C, Coddeville B, Michalski JC. Structural diversity and specific distribution of O-glycans in normal human mucins along the intestinal tract. Biochem J 2005; 384:307-16. [PMID: 15361072 PMCID: PMC1134114 DOI: 10.1042/bj20040605] [Citation(s) in RCA: 265] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Purified human mucins from different parts of the intestinal tract (ileum, cecum, transverse and sigmoid colon and rectum) were isolated from two individuals with blood group ALe(b) (A-Lewis(b)). After alkaline borohydride treatment the released oligosaccharides were structurally characterized by nano-ESI Q-TOF MS/MS (electrospray ionization quadrupole time-of-flight tandem MS) without prior fractionation or derivatization. More than 100 different oligosaccharides, with up to ten monosaccharide residues, were identified using this technique. Oligosaccharides based on core 3 structures, GlcNAc(beta1-3)GalNAc (where GlcNAc is N-acetyl-D-glucosamine and GalNAc is N-acetylgalactosamine), were widely distributed in human intestinal mucins. Core 5 structures, GalNAc(alpha1-3)GalNAc, were also recovered in all fractions. Moreover, a comparison of the oligosaccharide repertoire, with respect to size, diversity and expression of glycans and terminal epitopes, showed a high level of mucin-specific glycosylation: highly fucosylated glycans, found specifically in the small intestine, were mainly based on core 4 structures, GlcNAc-(beta1-3)[GlcNAc(beta1-6)]GalNAc, whereas the sulpho-Le(X) determinant carrying core 2 glycans, Gal(beta1-3)[GlcNAc(beta1-6)]-GalNAc (where Gal is galactose), was recovered mainly in the distal colon. Blood group H and A antigenic determinants were present exclusively in the ileum and cecum, whereas blood group Sd(a)/Cad related epitopes, GalNAc(beta1-4)[NeuAc(alpha2-3)]Gal (where NeuAc is N-acetylneuraminate), were found to increase along the length of the colon. Our findings suggest that mucins create an enormous repertoire of potential binding sites for micro-organisms that could explain the regio-specific colonization of bacteria in the human intestinal tract.
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Affiliation(s)
- Catherine Robbe
- *Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
| | - Calliope Capon
- *Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
- †Laboratoire de Biochimie, Faculté des Sciences Pharmaceutiques et Biologiques de Lille 2, 59006 Lille Cedex, France
- To whom correspondence should be addressed (email )
| | - Bernadette Coddeville
- *Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
| | - Jean-Claude Michalski
- *Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
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Carpentier M, Morelle W, Coddeville B, Pons A, Masson M, Mazurier J, Legrand D. Nucleolin undergoes partial N- and O-glycosylations in the extranuclear cell compartment. Biochemistry 2005; 44:5804-15. [PMID: 15823039 DOI: 10.1021/bi047831s] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Nucleolin is an ubiquitous, nonhistone nucleolar phosphoprotein involved in fundamental aspects of transcription regulation, cell proliferation, and growth. Nucleolin was primarily found in the nucleus, but it was also proposed as a possible shuttle between the nucleus, cytoplasm, and cell membrane. We report here that part of the extranuclear nucleolin undergoes complex N- and O-glycosylations. A band with higher molecular mass (113 kDa) than the 105-kDa classical major nucleolin band was detected on SDS-PAGE gel that cross-reacted with specific anti-nucleolin antibodies and was identified as a nucleolin isoform by mass spectrometry. The presence of N-glycans was first suggested by sensibility of the 113-kDa nucleolin isoform to tunicamycin treatment. Determination of monosaccharide composition by heptafluorobutyrate derivation followed by gas-chromatography mass spectrometry indicated the presence of N- and O-glycans. The structures of N- and O-glycans were first investigated using specificity of binding to lectins. This approach allowed a partial characterization of N-glycan structures and revealed O-glycan structures that could otherwise go unnoticed. Further study of N-glycans by mass spectrometry using direct exoglycosidase treatment on MALDI-TOF target allowed the complete definition of their structures. Finally, the use of peptide mass fingerprinting with sinapinic acid allowed identification of N317 and N492 as the two N-glycosylation sites. N317 and N492 belong to RNA-binding domains 1 and 3 of nucleolin, respectively, that suggests a role of glycosylation in regulating the function of the protein.
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Affiliation(s)
- Mathieu Carpentier
- Unité de Glycobiologie Structurale et Fonctionnelle, Institut Fédératif de Recherche 118, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France
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Robbe C, Capon C, Coddeville B, Michalski JC. Diagnostic ions for the rapid analysis by nano-electrospray ionization quadrupole time-of-flight mass spectrometry of O-glycans from human mucins. Rapid Commun Mass Spectrom 2004; 18:412-420. [PMID: 14966848 DOI: 10.1002/rcm.1352] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nano-electrospray ionization quadrupole time-of-flight mass spectrometry (nanoESI-Q-TOFMS) was used for sensitive mapping and sequencing of underivatized oligosaccharide alditols obtained from human mucins. Using subnanomolar amounts of oligosaccharides previously analyzed by nuclear magnetic resonance (NMR), series of diagnostic ions relevant to the structural characterization of O-glycans were deduced. Determination of the core type as well as positions and partial linkages of fucose residues could be readily obtained from the dominant [M+Na](+) ions. Differentiation of isomeric structures and glycosidic linkages were defined by the characteristic cross-ring (0,2)A-type cleavages in the negative ion mode. Tandem (MS/MS) mass spectra of [M-H](-) ions from sialylated or sulfated O-glycans revealed information concerning the position and linkage of such residues. These fragmentation rules were further applied in the structural determination of glycans from human colonic mucins. All these findings indicated the efficiency of ESI-Q-TOFMS for the determination of oligosaccharide composition, sequence, partial linkage and substitution, providing a wealth of structural information with sensitivity sufficient for the analysis of quantities as obtained from natural sources.
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Affiliation(s)
- Catherine Robbe
- Unité Mixte de Recherche CNRS/USTL 8576, 'Glycobiologie Structurale et Fonctionnelle', IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France
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Samyn-Petit B, Wajda Dubos JP, Chirat F, Coddeville B, Demaizieres G, Farrer S, Slomianny MC, Theisen M, Delannoy P. Comparative analysis of the site-specific N-glycosylation of human lactoferrin produced in maize and tobacco plants. Eur J Biochem 2003; 270:3235-42. [PMID: 12869199 DOI: 10.1046/j.1432-1033.2003.03706.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have compared the site-by-site N-glycosylation status of human lactoferrin (Lf) produced in maize, a monocotyledon, and in tobacco, used as a model dicotyledon. Maize and tobacco plants were stably transformed and recombinant Lf was purified from both seeds and leaves. N-glycopeptides were generated by trypsin digestion of recombinant Lf and purified by reverse-phase HPLC. The N-glycosylation pattern of each site was determined by mass spectrometry. Our results indicated that the N-glycosylation patterns of recombinant Lf produced in maize and tobacco share common structural features. In particular, both N-glycosylation sites of each recombinant Lf are mainly substituted by typical plant paucimannose-type N-glycans, with beta1,2-xylose and alpha1,3-linked fucose at the proximal N-acetylglucosamine. However, tobacco Lf shows a significant amount of processed N-glycans with one or two beta1,2GlcNAc linked to the trimannose core, which are weakly expressed in maize Lf. Finally, no Lewisa epitope was observed on tobacco Lf.
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Affiliation(s)
- Bénédicte Samyn-Petit
- Unité de Glycobiologie Structurale et Fonctionnelle, UMR CNRS 8576, Laboratoire de Chimie Biologique, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Trinel PA, Maes E, Zanetta JP, Delplace F, Coddeville B, Jouault T, Strecker G, Poulain D. Candida albicans phospholipomannan, a new member of the fungal mannose inositol phosphoceramide family. J Biol Chem 2002; 277:37260-71. [PMID: 12138092 DOI: 10.1074/jbc.m202295200] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The pathogenic yeast Candida albicans has the ability to synthesize unique sequences of beta-1,2-oligomannosides that act as adhesins, induce cytokine production, and generate protective antibodies. Depending on the growth conditions, beta-1,2-oligomannosides are associated with different carrier molecules in the cell wall. Structural evidence has been obtained for the presence of these residues in the polysaccharide moiety of the glycolipid, phospholipomannan (PLM). In this study, the refinement of purification techniques led to large quantities of PLM being extracted from Candida albicans cells. A combination of methanolysis, gas chromatography, mass spectrometry, and nuclear magnetic resonance analyses allowed the complete structure of PLM to be deduced. The lipid moiety was shown to consist of a phytoceramide associating a C(18)/C(20) phytosphingosine and C(25), C(26), or mainly C(24) hydroxy fatty acids. The spacer linking the glycan part was identified as a unique structure: -Man-P-Man-Ins-P-. Therefore, in contrast to the major class of membranous glycosphingolipids represented by mannose diinositol phosphoceramide, which is derived from mannose inositol phosphoceramide by the addition of inositol phosphate, PLM seems to be derived from mannose inositol phosphoceramide by the addition of mannose phosphate. In relation to a previous study of the glycan part of the molecule, the assignment of the second phosphorus position leads to the definition of PLM beta-1,2-oligomannosides as unbranched linear structures that may reach up to 19 residues in length. Therefore, PLM appears to be a new type of glycosphingolipid, which is glycosylated extensively through a unique spacer. The conferred hydrophilic properties allow PLM to diffuse into the cell wall in which together with mannan it presents C. albicans beta-1,2-oligomannosides to host cells.
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Affiliation(s)
- Pierre-André Trinel
- Laboratoire de Mycologie Fondamentale et Appliquée, Inserm EPI 9915, Faculté de Médecine, Pôle Recherche, 59037, Lille Cedex, France
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Guérardel Y, Balanzino L, Maes E, Leroy Y, Coddeville B, Oriol R, Strecker G. The nematode Caenorhabditis elegans synthesizes unusual O-linked glycans: identification of glucose-substituted mucin-type O-glycans and short chondroitin-like oligosaccharides. Biochem J 2001; 357:167-82. [PMID: 11415447 PMCID: PMC1221939 DOI: 10.1042/0264-6021:3570167] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The free-living nematode Caenorhabditis elegans is a relevant model for studies on the role of glycoconjugates during development of multicellular organisms. Several genes coding for glycosyltransferases involved in the synthesis of N- and O-linked glycans have already been isolated, but, apart from repetitive dimers of glycosaminoglycans, no detailed structure of either type of component has been published so far. This study aimed to establish the structures of the major O-glycans synthesized by C. elegans to give an insight into the endogenous glycosyltransferase activities expressed in this organism. By the use of NMR and MS, we have resolved the sequence of seven of these components that present very unusual features. Most of them were characterized by the type-1 core substituted on Gal and/or GalNAc by (beta1-4)Glc and (beta1-6)Glc residues. Another compound exhibited the GalNAc(beta1-4)N-acetylglucosaminitol sequence in the terminal position, to which was attached a tetramer of beta-Gal substituted by both Fuc and 2-O-methyl-fucose residues. Our experimental procedure led also to the isolation of glycosaminoglycan-like components and oligomannosyl-type N-glycans. In particular, the data confirmed that C. elegans synthesizes the ubiquitous linker sequence GlcA(beta1-3)Gal(beta1-3)Gal(beta1-4)Xyl.
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Affiliation(s)
- Y Guérardel
- Laboratoire de Chimie Biologique et Unité Mixte de Recherche du CNRS 8576, Université des Sciences et Technologies de Lille, F-59655 Villeneuve d'Ascq, France.
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Coddeville B, Regoeczi E, Strecker G, Plancke Y, Spik G. Structural analysis of trisialylated biantennary glycans isolated from mouse serum transferrin. Characterization of the sequence Neu5Gc(alpha 2-3)Gal(beta 1-3)[Neu5Gc(alpha 2-6)]GlcNAc(beta 1-2)Man. Biochim Biophys Acta 2000; 1475:321-8. [PMID: 10913832 DOI: 10.1016/s0304-4165(00)00083-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Five variants of mouse serum transferrin (mTf, designated mTf-I to mTf-V) with respect to carbohydrate composition have been isolated by DEAE-cellulose chromatography in the following relative percentages: mTf-I: 0.55; mTf-II: 0.79; mTf-III: 71.80; mTf-VI: 21. 90 and mTf-V: 4.96. The primary structures of the major glycans from mTf-III and mTf-IV were determined by methylation analysis and 1H-nuclear magnetic resonance (NMR) spectroscopy. All glycans possessed a common trimannosyl-N,N'-diacetylchitobiose core. From the glycovariant mTf-III two isomers of a conventional biantennary N-acetyllactosamine type were isolated, in which two N-glycolylneuraminic acid (Neu5Gc) residues are linked to galactose either by a (alpha 2-6) or (alpha 2-3) linkage. A subpopulation of this glycovariant contains a fucose residue (alpha 1-6)-linked to GlcNAc-1. The structure of the major glycan found in variant mTf-IV contained an additional Neu5Gc and possessed the following new type of linkage: Neu5Gc(alpha 2-3)Gal(beta 1-3)[Neu5Gc(alpha 2-6)]GlcNAc(beta 1-2 )Man(alpha 1-3). In addition to this glycan, a minor compound contained the same antennae linked to Man(alpha 1-6). In fraction mTf-V, which was found to be very heterogeneous by (1)H NMR analysis, carbohydrate composition and methylation analysis suggested the presence of tri'-antennary glycans sialylated by Neu5Gc alpha-2,6- and alpha-2, 3-linked to the terminal galactose residues. In summary, mTf glycans differed from those of other analyzed mammalian transferrins by the presence of Neu5Gc and by a Neu5Gc(alpha 2-6)GlcNAc linkage in trisialylated biantennary structures, reflecting in mouse liver, a high activity of CMP-Neu5Ac hydroxylase and (alpha 2-6)GlcNAc sialyltransferase.
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Affiliation(s)
- B Coddeville
- Laboratoire de Chimie Biologique de l'Université des Sciences et Technologies de Lille, UMR CNRS No. 8576, France
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Albani JR, Sillen A, Plancke YD, Coddeville B, Engelborghs Y. Interaction between carbohydrate residues of alpha1-acid glycoprotein (orosomucoid) and saturating concentrations of Calcofluor White. A fluorescence study. Carbohydr Res 2000; 327:333-40. [PMID: 10945681 DOI: 10.1016/s0008-6215(00)00053-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Calcofluor White is a fluorescent probe that interacts with polysaccharides and is commonly used in clinical studies. Interaction between Calcofluor White and carbohydrate residues of alpha1-acid glycoprotein (orosomucoid) was previously followed by fluorescence titration of the Trp residues of the protein. A stoichiometry of one Calcofluor for one protein has been found [J.R. Albani and Y.D. Plancke, Carbohydr. Res., 318 (1999) 193-200]. Alpha1-acid glycoprotein contains 40% carbohydrate by weight and has up to 16 sialic acid residues. Since binding of Calcofluor to alpha1-acid glycoprotein occurs mainly on the carbohydrate residues, we studied in the present work the interaction between Calcofluor and the protein by following the fluorescence change of the fluorophore. In order to establish the role of the sialic acid residues in the interaction, the experiments were performed with the sialylated and asialylated protein. Interaction of Calcofluor with sialylated alpha1-acid glycoprotein induces a red shift of the emission maximum of the fluorophore from 438 to 450 nm at saturation (one Calcofluor for one sialic acid) and an increase in the fluorescence intensity. At saturation the fluorescence intensity increase levels off. Binding of Calcofluor to asialylated acid glycoprotein does not change the position of the emission maximum of the fluorophore and induces a decrease in its fluorescence intensity. Saturation occurs when 10 molecules of Calcofluor are bound to 1 mol of alpha1-acid glycoprotein. Since the protein contains five heteropolysaccharide groups, we have 2 mol of Calcofluor for each group. Addition of free sialic acid to Calcofluor induces a continuous decrease in the fluorescence intensity of the fluorophore but does not change the position of the emission maximum. Our results confirm the presence of a defined spatial conformation of the sialic acid residues, a conformation that disappears when they are free in solution. Dynamics studies on Calcofluor White and the carbohydrate residues of alpha1-acid glycoprotein are also performed at saturating concentrations of Calcofluor using the red-edge excitation spectra and steady-state anisotropy studies. The red-edge excitation spectra experiments show an important shift (13 nm) of the fluorescence emission maximum of the probe. This reveals that emission of Calcofluor occurs before relaxation of the surrounding carbohydrate residues occurs. Emission from a non-relaxed state means that the microenvironment of bound Calcofluor is rigid, inducing in this way the rigidity of the fluorophore itself, a result confirmed by anisotropy studies.
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Affiliation(s)
- J R Albani
- Laboratoire de Biophysique Moléculaire, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France.
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Froidevaux R, Lignot B, Nedjar-Arroume N, Guillochon D, Coddeville B, Ricart G. Kinetics of appearance of hemorphins from bovine hemoglobin peptic hydrolysates by a direct coupling of reversed-phase high-performance liquid chromatography and electrospray ionization mass spectrometry. J Chromatogr A 2000; 873:185-94. [PMID: 10757296 DOI: 10.1016/s0021-9673(99)01353-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Reversed-phase high-performance liquid chromatography coupled with electrospray ionization mass spectrometry was used to improve the preparation of three opioid peptides (Leu-Val-Val-hemorphin-7, Val-Val-hemorphin-7 and Val-Val-hemorphin-4) resulting from bovine hemoglobin peptic hydrolysates. Optimal conditions for the preparation of these peptides were determined thanks to their kinetic studies of appearance in the course of peptic hydrolyses as a function of degree of hydrolysis of hemoglobin. We propose a low degree of hydrolysis (3%) to prepare Leu-Val-Val-hemorphin-7, a mean degree of hydrolysis (11%) to prepare Val-Val-hemorphin-7 and a high degree of hydrolysis (21%) to prepare Val-Val-hemorphin-4.
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Affiliation(s)
- R Froidevaux
- Laboratoire de Technologie des Substances Naturelles, IUT A Lille 1, Villeneuve d'Ascq, France
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41
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Cren-Olivé C, Déprez S, Lebrun S, Coddeville B, Rolando C. Characterization of methylation site of monomethylflavan-3-ols by liquid chromatography/electrospray ionization tandem mass spectrometry. Rapid Commun Mass Spectrom 2000; 14:2312-2319. [PMID: 11114043 DOI: 10.1002/1097-0231(20001215)14:23<2312::aid-rcm160>3.0.co;2-a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI-MS/MS) was used for the structural characterization and differentiation of four isomeric O-monomethylated catechins (on phenolic positions) by the analysis of the fragmentation behaviour of catechin. The catechin fragmentation routes were rationalized and it is shown that several diagnostic ions such as (1,3)A(+), (1,2)B(+), and (1,4)B(+) allow the unambiguous identification of the methylated ring. The precise position of the methyl group on each ring is determined by the difference in the relative intensities of the diagnostic ions. Isomeric O-methylepicatechins were also differentiated using this methodology.
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Affiliation(s)
- C Cren-Olivé
- Université des Sciences et Technologies de Lille, UPRESA 8009, Chimie Organique et Macromoléculaire, Equipe Polyphénols, B atiment C4, 59655 Villeneuve d'Ascq, France
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42
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Coppin A, Maes E, Flahaut C, Coddeville B, Strecker G. Acquisition of species-specific O-linked carbohydrate chains from oviducal mucins in Rana arvalis. A case study. Eur J Biochem 1999; 266:370-82. [PMID: 10561577 DOI: 10.1046/j.1432-1327.1999.00862.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The extracellular matrix surrounding amphibian eggs is composed of mucin-type glycoproteins, highly O-glycosylated and plays an important role in the fertilization process. Oligosaccharide-alditols were released from the oviducal mucins of the anuran Rana arvalis by alkali-borohydride treatment in reduced conditions. Neutral and acidic oligosaccharides were fractionated by ion-exchange chromatographies and purified by HPLC. Each compound was identified by matrix assisted laser desorption ionization-time of flight (MALDI-TOF) spectrometry, NMR spectroscopy, electrospray ionization-tandem mass spectroscopy (ESI-MS/MS) and permethylation analyses. This paper reports on the structures of 19 oligosaccharide-alditols, 12 of which have novel structures. These structures range in size from disaccharide to octasaccharide. Some of them are acidic, containing either a glucuronic acid or, more frequently, a sulfate group, located either at the 6 position of GlcNAc or the 3 or 4 positions of Gal. This latter sulfation is novel and has only been characterized in the species R. arvalis. This structural analysis led to the establishment of several novel carbohydrate structures, demonstrating the structural diversity and species-specificity of amphibian glycoconjugates.
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Affiliation(s)
- A Coppin
- Laboratoire de Chimie Biologique, Unité Mixte de Recherche du Centre Nacional de la Recherche Scientifique n8576, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Albani JR, Sillen A, Coddeville B, Plancke YD, Engelborghs Y. Dynamics of carbohydrate residues of alpha 1-acid glycoprotein (orosomucoid) followed by red-edge excitation spectra and emission anisotropy studies of Calcofluor White. Carbohydr Res 1999; 322:87-94. [PMID: 10629951 DOI: 10.1016/s0008-6215(99)00205-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Dynamics studies on Calcofluor White bound to the carbohydrate residues of sialylated and asialylated alpha 1-acid glycoprotein (orosomucoid) have been performed. The interaction between the fluorophore and the protein was found to occur preferentially with the glycan residues with a dependence on their spatial conformation. In the presence of sialylated alpha 1-acid glycoprotein, excitation at the red edge of the absorption spectrum of calcofluor does not lead to a shift in the fluorescence emission maximum (440 nm) of the fluorophore. Thus, the emission of calcofluor occurs from a relaxed state. This is confirmed by anisotropy studies as a function of temperature (Perrin plot). In the presence of asialylated alpha 1-acid glycoprotein, red-edge excitation spectra show an important shift (8 nm) of the fluorescence emission maximum of the probe. This reveals that emission of calcofluor occurs before relaxation of the surrounding carbohydrate residues occurs. Emission from a non-relaxed state means that Calcofluor molecules are bound tightly to the carbohydrate residues, a result confirmed by anisotropy studies.
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Affiliation(s)
- J R Albani
- Laboratoire de Biophysique Moléculaire, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France.
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Abstract
The heat-stable acid-soluble phosphoglycoprotein component PP3 was isolated from the bovine milk proteose peptone fraction by concanavalin A affinity chromatography. Glycopeptides from the ConA-bound fraction corresponding to the component PP3 were obtained by Pronase digestion and were separated by gel filtration into high and low-molecular-mass glycopeptides. In a previous work, we have investigated the structure of the N-glycans from the high-molecular-mass glycopeptides [Girardet et al. (1995) Eur J Biochem 234: 939-46]. Here, we describe the structure of the O-glycans from the low-molecular-mass glycopeptides. By combining methylation analysis, mass spectrometry, 400 MHz 1H-NMR spectroscopy and peptide sequence analysis, we show that the low-molecular-mass fraction contains several neutral glycopeptides. A mixture of the following three glycan structures linked to the Thr86 has been identified: GalNac alpha1-O-Thr, Gal(beta1-3)GalNAc alpha1-O-Thr and Gal(beta1-4)GlcNAc(beta1-6)[Gal(beta1-3)]GalNAc alpha1-O-Thr.
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Affiliation(s)
- B Coddeville
- Laboratoire de Chimie Biologique, Unité Mixte de Recherche du Centre National de la Recherche Scientifique no 111, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Coddeville B, Carchon H, Jaeken J, Briand G, Spik G. Determination of glycan structures and molecular masses of the glycovariants of serum transferrin from a patient with carbohydrate deficient syndrome type II. Glycoconj J 1998; 15:265-73. [PMID: 9579803 DOI: 10.1023/a:1006997012617] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Serum transferrin from a child with carbohydrate deficient syndrome type II was isolated by immunoaffinity chromatography and separated into minor and major fractions by fast protein liquid chromatography. The structure of the glycans released from the major fraction by hydrazinolysis was established by application of methanolysis and 1H-NMR spectroscopy. The results led to the identification of an N-acetyllactosamininic type monosialylated, monoantennary Man(alpha1-3) linked glycan. By electrospray-mass spectrometry analysis, the whole serum transferrin was separated into at least seven species (I to VII) with molecular masses ranging from 77,958 to 79,130 Da. On the basis of a polypeptide chain molecular mass of 75,143 Da, it was calculated that the major transferrin species III (78,247 Da) contains two monosialylated monoantennary glycans. The molecular mass of transferrin species V and VI (78,678 and 78,971 Da) suggests that one of their two glycans contains an additional N-acetyllactosamine and a sialylated N-acetyllactosamine units, respectively. Transferrin species I and V were found to correspond to the desialylated forms of species III and VI. The abnormal glycan structures can be explained by a defect in the N-acetylglucosaminyltransferase II activity [Charuk et al. (1995) Eur J Biochem 230: 797-805].
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Affiliation(s)
- B Coddeville
- Laboratoire de Chimie Biologique, Unité Mixte de Recherche n 111 du Centre National de la Recherche Scientifique, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Lopez M, Coddeville B, Langridge J, Plancke Y, Sautière P, Chaabihi H, Chirat F, Harduin-Lepers A, Cerutti M, Verbert A, Delannoy P. Microheterogeneity of the oligosaccharides carried by the recombinant bovine lactoferrin expressed in Mamestra brassicae cells. Glycobiology 1997; 7:635-51. [PMID: 9254046 DOI: 10.1093/glycob/7.5.635] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The development of therapeutic glycoprotein production using the baculovirus expression system depends on the ability of insect cell lines to reproduce site specific mammalian-like N-glycans. A combination of 1H-NMR and mass spectrometry techniques (MALD-MS, ES-MS, and CID-MS-MS) allowed us to elucidate the N-linked oligosaccharides microheterogeneity on three different N-glycosylation sites, Asn233, Asn476, and Asn545, of a baculovirus-expressed recombinant bovine lactoferrin produced in Mamestra brassicae. Two families of N-glycan structures have been found: first, oligomannosidic glycans (Man[9-5]GlcNAc2) and secondly, short truncated partially fucosylated glycans (Man(3-2)[Fuc(0-1)]GlcNAc2). These results indicate that Mamestra brassicae cell line is not able to synthesize complex N-glycans, even if an alpha1,6-linked fucose residue is frequently present on the asparagine-bound N-acetylglucosamine residue of short truncated structures. Nevertheless, we have shown that Mamestra brassicae ensures the same N-glycosylation pattern as found on natural bovine lactoferrin showing the same distribution between complex and high-mannose type glycans on the different glycosylation sites. Sites which are naturally occupied by high-mannose glycans (Asn233 and Asn545) are substituted essentially by the same type of N-glycans in the recombinant counterpart, and the site Asn476,which carries sialylated complex type chains in the natural glycoprotein, is substituted by short, truncated, partially fucosylated chains in Mamestra brassicae-expressed bovine lactoferrin. These various results lead us to the conclusion that bovine lactoferrin is an interesting model to determine the potential of glycosylation of the baculovirus/insect cell expression systems.
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Affiliation(s)
- M Lopez
- Laboratoire de Chimie Biologique, Unité Mixte de Recherche du CNRS n 111, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Salmon V, Legrand D, Georges B, Slomianny MC, Coddeville B, Spik G. Characterization of human lactoferrin produced in the baculovirus expression system. Protein Expr Purif 1997; 9:203-10. [PMID: 9056485 DOI: 10.1006/prep.1996.0687] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Lactoferrin, an iron-binding 80-kDa glycoprotein, is a major component of human milk whose structure is now well defined. The binding site of lactoferrin to the membrane receptor of lymphocyte has been located in the region 4-52, but the amino acids directly involved in the interaction have not been identified yet. To gain further insights into the structure-function relationships of the lactoferrin binding site, we first expressed the cDNA encoding human lactoferrin in the lepidoptera Spodoptera frugiperda cells (Sf9) using a recombinant baculovirus. The selected transformant secreted and N-glycosylated protein of 78 kDa which was immunoprecipitated by specific anti-lactoferrin antibodies. To confirm the structure and the function of the recombinant lactoferrin, the protein was purified by ion-exchange chromatography and its physical, biochemical, and biological properties were compared with those of the native protein. In particular, the N-terminal amino acid sequence and the iron-binding stability as a function of pH, of both proteins, were identical. The main difference concerns the glycosylation which leads to glycans of lower molecular masses as detected by the electrophoretic mobility of lactoferrin after N-glycosidase F treatment and matrix-assisted laser desorption ionization/time-of-flight mass spectrometry. Despite the different glycosylation features, the recombinant lactoferrin retained the binding property to the Jurkat human lymphoblastic T-cell line of the native lactoferrin. On the basis of these analyses, production of protein mutants generated by site-directed mutagenesis is now in process.
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Affiliation(s)
- V Salmon
- Laboratoire de Chimie Biologique, Centre National de la Recherche Scientifique, Université des Sciences et Technologies de Lille, Villeneuve, France
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Girardet JM, Coddeville B, Plancke Y, Strecker G, Campagna S, Spik G, Linden G. Structure of glycopeptides isolated from bovine milk component PP3. Eur J Biochem 1995; 234:939-46. [PMID: 8575455 DOI: 10.1111/j.1432-1033.1995.939_a.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The heat-stable acid-soluble phosphoglycoprotein component PP3 was isolated from the bovine milk proteose peptone fraction by concanavalin A affinity chromatography. Glycopeptides were released by pronase digestion of the milk component PP3 and were subsequently separated by high-pH anion-exchange chromatography on CarboPac PA-1. The primary structures of the glycan and peptide moieties of eight N-glycopeptides have been established by combining methylation analysis, mass spectrometry, 400-MHz 1H-NMR spectroscopy, and peptide sequence analysis. All the analyzed fractions contained biantennary N-acetyllactosamine-type carbohydrate chains, some of them with a GalNAc(beta 1-4)GlcNAc or a NeuAc(alpha 2-6)GalNAc(beta 1-4)GlcNAc group. This particular sequence did or did not replace the Gal(beta 1-4)GlcNAc group usually found in most N-linked glycans. Moreover, the sialylated Gal and GalNAc residues were only found on the Man(alpha 1-3) antenna.
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Affiliation(s)
- J M Girardet
- Laboratoire des BioSciences de l'Aliment, associé INRA, Université Henri Poincaré-Nancy 1, France
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49
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Abstract
The hemopexin phenotype HpxB1 isolated from sheep serum, yields three major bands when subjected to starch gel and/or polyacrylamide gel electrophoresis which are here designated as subcomponents HpxB1-I, HpxB1-II and HpxB1-III. Electrospray mass spectrometric analysis of samples of the isolated subcomponents prepared by ion exchange chromatography showed that each was composed of three glycoproteins and that the major difference between the subcomponents was due to their constituent glycoproteins possessing different numbers of sialic acid residues. Combined analysis of the ESI-MS data and of the overall carbohydrate compositional data obtained by colorimetric procedures, leads to the composition of the glycan of each glycoprotein, and a combined methylation and 400 MHz H-NMR analysis of the alkaline cleaved glycans identified them as being of only the biantennary N-acetyllactosamine type. Taking into account the molecular mass, the carbohydrate content and structure it may be concluded that each of the constituent glycoproteins contain five N-glycosidically linked glycans.
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Affiliation(s)
- B Coddeville
- Laboratoire de Chimie Biologique, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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Legrand D, Salmon V, Coddeville B, Benaissa M, Plancke Y, Spik G. Structural determination of two N-linked glycans isolated from recombinant human lactoferrin expressed in BHK cells. FEBS Lett 1995; 365:57-60. [PMID: 7774715 DOI: 10.1016/0014-5793(95)00441-b] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A full-length cDNA coding for human lactoferrin was isolated from a mammary gland library and the recombinant protein was expressed in BHK cells as described by Stowell K. M. et al. [1991, Biochem. J. 276, 349-355]. Two N-linked glycans from purified recombinant lactoferrin were released by hydrazinolysis and analyzed by 400-MHz 1H-NMR spectroscopy. The identified structures corresponded to N-acetyllactosaminic biantennary glycans and were alpha-2,3-disialylated forms (80%) or alpha-2,3-monosialylated (20%) forms. Moreover, 70% of total glycans were alpha-1,6-fucosylated at the GlcNAc residue linked to asparagine. In regard to its glycan moiety, the recombinant glycoprotein is close to native lactoferrins from milk or leucocytes but shows specific structural features which should be taken into account prior to in vivo and in vitro biological studies.
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Affiliation(s)
- D Legrand
- Laboratoire de Chimie Biologique, UMR CNRS n.111, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq, France
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