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Kassem R, Cousin A, Clesse D, Poignavent V, Trolet A, Ritzenthaler C, Michon T, Chovin A, Demaille C. Nanobody-guided redox and enzymatic functionalization of icosahedral virus particles for enhanced bioelectrocatalysis. Bioelectrochemistry 2024; 155:108570. [PMID: 37769510 DOI: 10.1016/j.bioelechem.2023.108570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/31/2023] [Revised: 09/07/2023] [Accepted: 09/11/2023] [Indexed: 10/03/2023]
Abstract
Icosahedral, 30 nm diameter, grapevine fanleaf virus (GFLV) virus particles are adsorbed onto electrodes and used as nanoscaffolds for the assembly of an integrated glucose oxidizing system, comprising the enzyme pyrroloquinoline quinone-glucose dehydrogenase (PQQ-GDH) and ferrocenylated polyethylene glycol chains (Fc-PEG) as a redox co-substrate. Two different GFLV-specific nanobodies, either fused to the enzyme, or chemically conjugated to Fc-PEG, are used for the regio-selective immunodecoration of the viral particles. A comprehensive kinetic characterization of the enzymatic function of the particles, initially decorated with the enzyme alone shows that simple immobilization on the GFLV capsid has no effect on the kinetic scheme of the enzyme, nor on its catalytic activity. However, we find that co-immobilization of the enzyme and the Fc-PEG co-substrate on GFLV does induce enzymatic enhancement, by promoting cooperativity between the two subunits of the homodimeric enzyme, via "synchronization" of their redox state. A decrease in inhibition of the enzyme by its substrate (glucose) is also observed.
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Affiliation(s)
- Racha Kassem
- Université Paris Cité, CNRS, Laboratoire d'Electrochimie Moléculaire, F-75013 Paris, France
| | - Anne Cousin
- Institut de Biologie Moléculaire des Plantes, UPR2357 du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg, France
| | - Daniel Clesse
- Institut de Biologie Moléculaire des Plantes, UPR2357 du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg, France
| | - Vianney Poignavent
- Institut de Biologie Moléculaire des Plantes, UPR2357 du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg, France
| | - Adrien Trolet
- Institut de Biologie Moléculaire des Plantes, UPR2357 du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg, France
| | - Christophe Ritzenthaler
- Institut de Biologie Moléculaire des Plantes, UPR2357 du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg, France.
| | - Thierry Michon
- Université de Bordeaux, Biologie du Fruit et Pathologie, INRA UMR 1332, F-33140 Villenave d'Ornon, France.
| | - Arnaud Chovin
- Université Paris Cité, CNRS, Laboratoire d'Electrochimie Moléculaire, F-75013 Paris, France.
| | - Christophe Demaille
- Université Paris Cité, CNRS, Laboratoire d'Electrochimie Moléculaire, F-75013 Paris, France.
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2
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Moury B, Michon T, Simon V, Palloix A. A Single Nonsynonymous Substitution in the RNA-Dependent RNA Polymerase of Potato virus Y Allows the Simultaneous Breakdown of Two Different Forms of Antiviral Resistance in Capsicum annuum. Viruses 2023; 15:v15051081. [PMID: 37243167 DOI: 10.3390/v15051081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/03/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/28/2023] Open
Abstract
The dominant Pvr4 gene in pepper (Capsicum annuum) confers resistance to members of six potyvirus species, all of which belong to the Potato virus Y (PVY) phylogenetic group. The corresponding avirulence factor in the PVY genome is the NIb cistron (i.e., RNA-dependent RNA polymerase). Here, we describe a new source of potyvirus resistance in the Guatemalan accession C. annuum cv. PM949. PM949 is resistant to members of at least three potyvirus species, a subset of those controlled by Pvr4. The F1 progeny between PM949 and the susceptible cultivar Yolo Wonder was susceptible to PVY, indicating that the resistance is recessive. The segregation ratio between resistant and susceptible plants observed in the F2 progeny matched preferably with resistance being determined by two unlinked recessive genes independently conferring resistance to PVY. Inoculations by grafting resulted in the selection of PVY mutants breaking PM949 resistance and, less efficiently, Pvr4-mediated resistance. The codon substitution E472K in the NIb cistron of PVY, which was shown previously to be sufficient to break Pvr4 resistance, was also sufficient to break PM949 resistance, a rare example of cross-pathogenicity effect. In contrast, the other selected NIb mutants showed specific infectivity in PM949 or Pvr4 plants. Comparison of Pvr4 and PM949 resistance, which share the same target in PVY, provides interesting insights into the determinants of resistance durability.
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Affiliation(s)
- Benoît Moury
- INRAE, Pathologie Végétale, 84140 Montfavet, France
| | - Thierry Michon
- UMR Biologie du Fruit et Pathologie, INRAE, Université de Bordeaux, CS 20032, 33882 Villenave d'Ornon, France
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3
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Paiva TO, Schneider A, Bataille L, Chovin A, Anne A, Michon T, Wege C, Demaille C. Enzymatic activity of individual bioelectrocatalytic viral nanoparticles: dependence of catalysis on the viral scaffold and its length. Nanoscale 2022; 14:875-889. [PMID: 34985473 DOI: 10.1039/d1nr07445h] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The enzymatic activity of tobacco mosaic virus (TMV) nanorod particles decorated with an integrated electro-catalytic system, comprising the quinoprotein glucose-dehydrogenase (PQQ-GDH) enzyme and ferrocenylated PEG chains as redox mediators, is probed at the individual virion scale by atomic force microscopy-scanning electrochemical atomic force microscopy (AFM-SECM). A marked dependence of the catalytic activity on the particle length is observed. This finding can be explained by electron propagation along the viral backbone, resulting from electron exchange between ferrocene moieties, coupled with enzymatic catalysis. Thus, the use of a simple 1D diffusion/reaction model allows the determination of the kinetic parameters of the virus-supported enzyme. Comparative analysis of the catalytic behavior of the Fc-PEG/PQQ-GDH system assembled on two differing viral scaffolds, TMV (this work) and bacteriophage-fd (previous work), reveals two distinct kinetic effects of scaffolding: An enhancement of catalysis that does not depend on the virus type and a modulation of substrate inhibition that depends on the virus type. AFM-SECM detection of the enzymatic activity of a few tens of PQQ-GDH molecules, decorating a 40 nm-long viral domain, is also demonstrated, a record in terms of the lowest number of enzyme molecules interrogated by an electrochemical imaging technique.
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Affiliation(s)
- Telmo O Paiva
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS UMR 7591, F-75013 Paris, France.
| | - Angela Schneider
- University of Stuttgart, Institute of Biomaterials and Biomolecular Systems, Research Unit Molecular and Synthetic Plant Virology, 70569 Stuttgart, Germany.
| | - Laure Bataille
- Université de Bordeaux, Biologie du Fruit et Pathologie, INRA UMR 1332, F-33140 Villenave d'Ornon, France.
| | - Arnaud Chovin
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS UMR 7591, F-75013 Paris, France.
| | - Agnès Anne
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS UMR 7591, F-75013 Paris, France.
| | - Thierry Michon
- Université de Bordeaux, Biologie du Fruit et Pathologie, INRA UMR 1332, F-33140 Villenave d'Ornon, France.
| | - Christina Wege
- University of Stuttgart, Institute of Biomaterials and Biomolecular Systems, Research Unit Molecular and Synthetic Plant Virology, 70569 Stuttgart, Germany.
| | - Christophe Demaille
- Université de Paris, Laboratoire d'Electrochimie Moléculaire, CNRS UMR 7591, F-75013 Paris, France.
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4
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Walter J, Barra A, Charon J, Tavert-Roudet G, Michon T. Spectroscopic Investigation of the Kinetic Mechanism Involved in the Association of Potyviral VPg with the Host Plant Translation Initiation Factor eIF4E. Int J Mol Sci 2020; 21:ijms21165618. [PMID: 32764527 PMCID: PMC7460627 DOI: 10.3390/ijms21165618] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/15/2022] Open
Abstract
The infectious cycle of potyviruses requires the formation of a complex between the viral genome-linked protein VPg and the host eukaryotic translation initiation factor 4E, eIF4E. Mutations associated with plant resistance to potyviruses were previously mapped at the eIF4E surface, while on the virus side, mutations leading to plant resistance breaking were identified within the VPg. In the present study, fluorescence spectroscopy was used to probe the contribution of the VPg intrinsically disordered region bearing amino acids determinant of the resistance breaking, to the VPg–eIF4E binding mechanism. Synthetic peptides encompassing the VPg88–120 central region were found to tightly bind to eIF4E. Fluorescence energy transfer experiments show that, upon binding to eIF4E, the N and C termini of the VPg88–111 fragment move closer to one another, at a distance compatible with a α-helix folding. When the VPg112–120 region, which contains amino acids associated with resistance breakdown, is appended to VPg88–111, the complex formation with eIF4E switches from a single-step to a two-step kinetic model. This study revisits a recent investigation of the VPg–eIF4E complex by specifying the contribution of the VPg central helix and its appended disordered region to VPg association with eIF4E.
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Affiliation(s)
- Jocelyne Walter
- INRAE, Biologie du Fruit et Pathologie, University of Bordeaux, UMR 1332, F-33140 Villenave d’Ornon, France; (J.W.); (A.B.); (G.T.-R.)
| | - Amandine Barra
- INRAE, Biologie du Fruit et Pathologie, University of Bordeaux, UMR 1332, F-33140 Villenave d’Ornon, France; (J.W.); (A.B.); (G.T.-R.)
| | - Justine Charon
- Faculty of Sciences, University of Sydney, Charles Perkins Center D17, Camperdown Campus, Sydney, NSW 2006, Australia;
| | - Geneviève Tavert-Roudet
- INRAE, Biologie du Fruit et Pathologie, University of Bordeaux, UMR 1332, F-33140 Villenave d’Ornon, France; (J.W.); (A.B.); (G.T.-R.)
| | - Thierry Michon
- INRAE, Biologie du Fruit et Pathologie, University of Bordeaux, UMR 1332, F-33140 Villenave d’Ornon, France; (J.W.); (A.B.); (G.T.-R.)
- Correspondence: ; Tel.: +33-(0)-557-12-23-91
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5
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Paiva TO, Torbensen K, Patel AN, Anne A, Chovin A, Demaille C, Bataille L, Michon T. Probing the Enzymatic Activity of Individual Biocatalytic fd-Viral Particles by Electrochemical-Atomic Force Microscopy. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01920] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Telmo O. Paiva
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Kristian Torbensen
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Anisha N. Patel
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Agnès Anne
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Arnaud Chovin
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Christophe Demaille
- Université de Paris, Laboratoire d’Electrochimie Moléculaire, CNRS UMR 7591, F-75006 Paris, France
| | - Laure Bataille
- Université de Bordeaux, Biologie du Fruit et Pathologie, INRA UMR 1332, F-33140 Villenave d’Ornon, France
| | - Thierry Michon
- Université de Bordeaux, Biologie du Fruit et Pathologie, INRA UMR 1332, F-33140 Villenave d’Ornon, France
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6
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Torbensen K, Patel AN, Anne A, Chovin A, Demaille C, Bataille L, Michon T, Grelet E. Immuno-Based Molecular Scaffolding of Glucose Dehydrogenase and Ferrocene Mediator on fd Viral Particles Yields Enhanced Bioelectrocatalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01263] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kristian Torbensen
- Laboratoire d’Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université − UMR 7591 CNRS, Bâtiment Lavoisier, 15 Rue Jean-Antoine de Baïf, 75205 CEDEX 13 Paris, France
| | - Anisha N. Patel
- Laboratoire d’Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université − UMR 7591 CNRS, Bâtiment Lavoisier, 15 Rue Jean-Antoine de Baïf, 75205 CEDEX 13 Paris, France
| | - Agnès Anne
- Laboratoire d’Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université − UMR 7591 CNRS, Bâtiment Lavoisier, 15 Rue Jean-Antoine de Baïf, 75205 CEDEX 13 Paris, France
| | - Arnaud Chovin
- Laboratoire d’Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université − UMR 7591 CNRS, Bâtiment Lavoisier, 15 Rue Jean-Antoine de Baïf, 75205 CEDEX 13 Paris, France
| | - Christophe Demaille
- Laboratoire d’Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université − UMR 7591 CNRS, Bâtiment Lavoisier, 15 Rue Jean-Antoine de Baïf, 75205 CEDEX 13 Paris, France
| | - Laure Bataille
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, 71, Avenue Edouard Bourlaux, CS 20032-33882 CEDEX Villenave d’Ornon, France
| | - Thierry Michon
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, 71, Avenue Edouard Bourlaux, CS 20032-33882 CEDEX Villenave d’Ornon, France
| | - Eric Grelet
- Centre de Recherche Paul-Pascal, UMR 5031 CNRS, Université de Bordeaux, 115 Avenue Schweitzer, 33600 Pessac, France
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7
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Walter J, Barra A, Doublet B, Céré N, Charon J, Michon T. Hydrodynamic Behavior of the Intrinsically Disordered Potyvirus Protein VPg, of the Translation Initiation Factor eIF4E and of their Binary Complex. Int J Mol Sci 2019; 20:E1794. [PMID: 30978975 PMCID: PMC6479716 DOI: 10.3390/ijms20071794] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/03/2019] [Accepted: 04/05/2019] [Indexed: 01/12/2023] Open
Abstract
Protein intrinsic disorder is involved in many biological processes and good experimental models are valuable to investigate its functions. The potyvirus genome-linked protein, VPg, displays many features of an intrinsically disordered protein. The virus cycle requires the formation of a complex between VPg and eIF4E, one of the host translation initiation factors. An in-depth characterization of the hydrodynamic properties of VPg, eIF4E, and of their binary complex VPg-eIF4E was carried out. Two complementary experimental approaches, size-exclusion chromatography and fluorescence anisotropy, which is more resolving and revealed especially suitable when protein concentration is the limiting factor, allowed to estimate monomers compaction upon complex formation. VPg possesses a high degree of hydration which is in agreement with its classification as a partially folded protein in between a molten and pre-molten globule. The natively disordered first 46 amino acids of eIF4E contribute to modulate the protein hydrodynamic properties. The addition of an N-ter His tag decreased the conformational entropy of this intrinsically disordered region. A comparative study between the two tagged and untagged proteins revealed the His tag contribution to proteins hydrodynamic behavior.
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Affiliation(s)
- Jocelyne Walter
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
| | - Amandine Barra
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
| | - Bénédicte Doublet
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
| | - Nicolas Céré
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
| | - Justine Charon
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
| | - Thierry Michon
- UMR 1332 Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS 20032, 33140 Villenave d'Ornon, France.
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8
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Charon J, Barra A, Walter J, Millot P, Hébrard E, Moury B, Michon T. First Experimental Assessment of Protein Intrinsic Disorder Involvement in an RNA Virus Natural Adaptive Process. Mol Biol Evol 2019; 35:38-49. [PMID: 29029259 PMCID: PMC5850501 DOI: 10.1093/molbev/msx249] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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] [Indexed: 02/07/2023] Open
Abstract
Intrinsic disorder (ID) in proteins is defined as a lack of stable structure in physiological conditions. Intrinsically disordered regions (IDRs) are highly abundant in some RNA virus proteomes. Low topological constraints exerted on IDRs are expected to buffer the effect of numerous deleterious mutations and could be related to the remarkable adaptive potential of RNA viruses to overcome resistance of their host. To experimentally test this hypothesis in a natural pathosystem, a set of four variants of Potato virus Y (PVY; Potyvirus genus) containing various ID degrees in the Viral genome-linked (VPg) protein, a key determinant of potyvirus adaptation, was designed. To estimate the ID contribution to the VPg-based PVY adaptation, the adaptive ability of the four PVY variants was monitored in the pepper host (Capsicum annuum) carrying a recessive resistance gene. Intriguingly, the two mutants with the highest ID content displayed a significantly higher ability to restore infection in the resistant host, whereas the less intrinsically disordered mutant was unable to restore infection. The role of ID on virus adaptation may be due either to a larger exploration of evolutionary pathways or the minimization of fitness penalty caused by resistance-breaking mutations. This pioneering study strongly suggests the positive impact of ID in an RNA virus adaptive capacity.
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Affiliation(s)
- Justine Charon
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, Villenave d'Ornon, France.,CNRS 5320, INSERM U1212, Pessac, France
| | - Amandine Barra
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, Villenave d'Ornon, France
| | - Jocelyne Walter
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, Villenave d'Ornon, France
| | | | - Eugénie Hébrard
- UMR Interactions Plantes-Microorganismes-Environnement, IRD, CIRAD, Université de Montpellier, Montpellier, France
| | | | - Thierry Michon
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, Villenave d'Ornon, France
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9
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Walter J, Charon J, Hu Y, Lachat J, Leger T, Lafforgue G, Barra A, Michon T. Comparative analysis of mutational robustness of the intrinsically disordered viral protein VPg and of its interactor eIF4E. PLoS One 2019; 14:e0211725. [PMID: 30763345 PMCID: PMC6375565 DOI: 10.1371/journal.pone.0211725] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 01/20/2019] [Indexed: 01/02/2023] Open
Abstract
Conformational intrinsic disorder is a feature present in many virus proteins. Intrinsically disordered regions (IDRs) have weaker structural requirement than ordered regions and mutations in IDRs could have a lower impact on the virus fitness. This could favor its exploration of adaptive solutions. The potyviral protein VPg contains IDRs with determinants for adaptation to its host plant. To experimentally assess whether IDRs are more resistant to mutations than ordered regions, the biologically relevant interaction between mutant libraries of both VPg and the eukaryotic translation initiation factor 4E (eIF4E) and their respective wild type partner was examined using yeast two hybrid assay. Our data shows that VPg is significantly more robust to mutations than eIF4E and as such belongs to a particular class of intrinsically disordered proteins. This result is discussed from the standpoint of IDRs involvement in the virus adaptive processes.
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Affiliation(s)
- Jocelyne Walter
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
- * E-mail: (JW); (TM)
| | - Justine Charon
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
- School of Life & Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
| | - Yihua Hu
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
| | - Joy Lachat
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
| | - Thomas Leger
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
| | - Guillaume Lafforgue
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
| | - Amandine Barra
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
| | - Thierry Michon
- UMR Biologie du Fruit et Pathologie, INRA, Université de Bordeaux, CS, Villenave d’Ornon, France
- * E-mail: (JW); (TM)
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10
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Anne A, Chovin A, Demaille C, Michon T. Redox-Immunofunctionalized Potyvirus Nanoparticles for High-Resolution Imaging by AFM-SECM Correlative Microscopy. Methods Mol Biol 2018; 1776:455-470. [PMID: 29869260 DOI: 10.1007/978-1-4939-7808-3_30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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] [Indexed: 06/08/2023]
Abstract
We present in this chapter a new experimental approach allowing the high resolution imaging of immune complexes on virus particles. Combined atomic force-electrochemical microscopy (AFM-SECM) is used to image the presence of ferrocene functionalized specific antibodies on the surface of potyvirus particles. For this purpose, potyviruses, flexuous filamentous phytoviruses with a high aspect ratio, have been chosen. This technique allows analysis of the distribution of antibody labeling over the virus population. But, more importantly, it opens up the imaging of immune complexes decorating a single viral particle. Finally, its high resolution allows the characterization in situ of the ultrastructure of a single immune complex on the particle.
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Affiliation(s)
- Agnès Anne
- Laboratory of Molecular Electrochemistry, CNRS-Université Paris Diderot, Paris, France.
| | - Arnaud Chovin
- Laboratory of Molecular Electrochemistry, CNRS-Université Paris Diderot, Paris, France
| | - Christophe Demaille
- Laboratory of Molecular Electrochemistry, CNRS-Université Paris Diderot, Paris, France.
| | - Thierry Michon
- Fruit Biology and Pathology, INRA-Université Bordeaux, Villenave d'Ornon, France.
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11
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Tavert-Roudet G, Anne A, Barra A, Chovin A, Demaille C, Michon T. The Potyvirus Particle Recruits the Plant Translation Initiation Factor eIF4E by Means of the VPg covalently Linked to the Viral RNA. Mol Plant Microbe Interact 2017; 30:754-762. [PMID: 28609214 DOI: 10.1094/mpmi-04-17-0091-r] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The viral protein genome-linked (VPg) of potyviruses is a protein covalently linked to the 5' end of viral RNA. It interacts with eIF4E, a component of the cellular translation initiation complex. It has been suggested that the 5' RNA-linked VPg could mimic the cellular mRNA cap, promoting synthesis of viral proteins. Here, we report evidence for recruitment of the plant eIF4E by Lettuce mosaic virus (LMV, potyvirus) particles via the 5' RNA-linked VPg. Analysis of the viral population was performed by enzyme-linked immunosorbent assay-based tests, either with crude extracts of LMV-infected tissues or purified viral particles. In both cases, LMV-VPg and LMV-eIF4E subpopulations could be detected. After reaching a maximum within the first 2 weeks postinoculation, these populations decreased and very few labeled particles were found later than 3 weeks postinoculation. The central domain of VPg (CD-VPg) was found to be exposed at the surface of the particles. Using a purified recombinant lettuce eIF4E and CD-VPg-specific antibodies, we demonstrate that the plant factor binds to the VPg via its central domain. Moreover, the plant eIF4E factor could be imaged at one end of the particles purified from LMV plant extracts, by immunoredox atomic force microscopy coupled to scanning electrochemical microscopy. We discuss the biological significance of these results.
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Affiliation(s)
| | - Agnès Anne
- 2 Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Amandine Barra
- 1 UMR 1332 BFP, INRA, Université Bordeaux, 33883 Villenave d'Ornon, France; and
| | - Arnaud Chovin
- 2 Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Christophe Demaille
- 2 Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
| | - Thierry Michon
- 1 UMR 1332 BFP, INRA, Université Bordeaux, 33883 Villenave d'Ornon, France; and
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12
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Patel AN, Anne A, Chovin A, Demaille C, Grelet E, Michon T, Taofifenua C. Scaffolding of Enzymes on Virus Nanoarrays: Effects of Confinement and Virus Organization on Biocatalysis. Small 2017; 13:1603163. [PMID: 28098963 DOI: 10.1002/smll.201603163] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/18/2016] [Indexed: 06/06/2023]
Abstract
Organizing active enzyme molecules on nanometer-sized scaffolds is a promising strategy for designing highly efficient supported catalytic systems for biosynthetic and sensing applications. This is achieved by designing model nanoscale enzymatic platforms followed by thorough analysis of the catalytic activity. Herein, the virus fd bacteriophage is considered as an enzyme nanocarrier to study the scaffolding effects on enzymatic activity. Nanoarrays of randomly oriented, or directionally patterned, fd bacteriophage virus are functionalized with the enzyme glucose oxidase (GOx), using an immunological assembly strategy, directly on a gold electrode support. The scaffolding process on the virus capsid is monitored in situ by AFM (atomic force microscopy) imaging, while cyclic voltammetry is used to interrogate the catalytic activity of the resulting functional GOx-fd nanoarrays. Kinetic analysis reveals the ability to modulate the activity of GOx via nanocarrier patterning. The results evidence, for the first time, enhancement of the enzymatic activity due to scaffolding on a filamentous viral particle.
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Affiliation(s)
- Anisha N Patel
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205, Paris Cedex 13, France
| | - Agnès Anne
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205, Paris Cedex 13, France
| | - Arnaud Chovin
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205, Paris Cedex 13, France
| | - Christophe Demaille
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205, Paris Cedex 13, France
| | - Eric Grelet
- Centre de Recherche Paul-Pascal, UPR 8641 CNRS, Université de Bordeaux, 115 avenue Schweitzer, 33600, Pessac, France
| | - Thierry Michon
- Biologie du Fruit et Pathologie, UMR 1332 INRA, Université de Bordeaux, 71 avenue Edouard Bourlaux, CS20032, 33882, Villenave d'Ornon Cedex, France
| | - Cécilia Taofifenua
- Laboratoire d'Electrochimie Moléculaire, UMR 7591 CNRS, Université Paris Diderot, Sorbonne Paris Cité, 15 rue Jean-Antoine de Baïf, F-75205, Paris Cedex 13, France
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13
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Charon J, Theil S, Nicaise V, Michon T. Protein intrinsic disorder within the Potyvirus genus: from proteome-wide analysis to functional annotation. Mol Biosyst 2016; 12:634-52. [PMID: 26699268 DOI: 10.1039/c5mb00677e] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Within proteins, intrinsically disordered regions (IDRs) are devoid of stable secondary and tertiary structures under physiological conditions and rather exist as dynamic ensembles of inter-converting conformers. Although ubiquitous in all domains of life, the intrinsic disorder content is highly variable in viral genomes. Over the years, functional annotations of disordered regions at the scale of the whole proteome have been conducted for several animal viruses. But to date, similar studies applied to plant viruses are still missing. Based on disorder prediction tools combined with annotation programs and evolutionary studies, we analyzed the intrinsic disorder content in Potyvirus, using a 10-species dataset representative of this genus diversity. In this paper, we revealed that: (i) the Potyvirus proteome displays high disorder content, (ii) disorder is conserved during Potyvirus evolution, suggesting a functional advantage of IDRs, (iii) IDRs evolve faster than ordered regions, and (iv) IDRs may be associated with major biological functions required for the Potyvirus cycle. Notably, the proteins P1, Coat protein (CP) and Viral genome-linked protein (VPg) display a high content of conserved disorder, enriched in specific motifs mimicking eukaryotic functional modules and suggesting strategies of host machinery hijacking. In these three proteins, IDRs are particularly conserved despite their high amino acid polymorphism, indicating a link to adaptive processes. Through this comprehensive study, we further investigate the biological relevance of intrinsic disorder in Potyvirus biology and we propose a functional annotation of potyviral proteome IDRs.
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Affiliation(s)
- Justine Charon
- UMR Biologie du Fruit et Pathologie, INRA, Villenave d'Ornon cedex, France. and UMR Biologie du Fruit et Pathologie, Université de Bordeaux, Villenave d'Ornon cedex, France
| | - Sébastien Theil
- UMR Biologie du Fruit et Pathologie, INRA, Villenave d'Ornon cedex, France. and UMR Biologie du Fruit et Pathologie, Université de Bordeaux, Villenave d'Ornon cedex, France
| | - Valérie Nicaise
- UMR Biologie du Fruit et Pathologie, INRA, Villenave d'Ornon cedex, France. and UMR Biologie du Fruit et Pathologie, Université de Bordeaux, Villenave d'Ornon cedex, France
| | - Thierry Michon
- UMR Biologie du Fruit et Pathologie, INRA, Villenave d'Ornon cedex, France. and UMR Biologie du Fruit et Pathologie, Université de Bordeaux, Villenave d'Ornon cedex, France
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14
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Besong-Ndika J, Wahlsten M, Cardinale D, Pille J, Walter J, Michon T, Mäkinen K. Toward the Reconstitution of a Two-Enzyme Cascade for Resveratrol Synthesis on Potyvirus Particles. Front Plant Sci 2016; 7:89. [PMID: 26904061 PMCID: PMC4748245 DOI: 10.3389/fpls.2016.00089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 01/18/2016] [Indexed: 05/04/2023]
Abstract
The highly ordered protein backbone of virus particles makes them attractive candidates for use as enzyme nano-carriers (ENCs). We have previously developed a non-covalent and versatile approach for adhesion of enzymes to virus particles. This approach makes use of z33, a peptide derived from the B-domain of Staphylococcus aureus protein A, which binds to the Fc domain of many immunoglobulins. We have demonstrated that with specific antibodies addressed against the viral capsid proteins (CPs) an 87% coverage of z33-tagged proteins can be achieved on potyvirus particles. 4-coumarate coenzyme A ligase (4CL2) and stilbene synthase (STS) catalyze consecutive steps in the resveratrol synthetic pathway. In this study, these enzymes were modified to carry an N-terminal z33 peptide and a C-terminal 6xHis tag to obtain (z)4CL2(His) and (z)STS(His), respectively. A protein chimera, (z)4CL2::STS(His), with the same modifications was also generated from the genetic fusion of both mono-enzyme encoding genes. All z33 enzymes were biologically active after expression in Escherichia coli as revealed by LC-MS analysis to identify resveratrol and assembled readily into macromolecular complexes with Potato virus A particles and α-PVA CP antibodies. To test simultaneous immobilization-purification, we applied the double antibody sandwich - ELISA protocol to capture active z33-containg mono-enzymes and protein chimera directly from clarified soluble cell lysates onto the virus particle surface. These immobilized enzymes were able to synthesize resveratrol. We present here a bottom up approach to immobilize active enzymes onto virus-based ENCs and discuss the potential to utilize this method in the purification and configuration of nano-devices.
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Affiliation(s)
- Jane Besong-Ndika
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of HelsinkiHelsinki, Finland
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université BordeauxVillenace d’Ornon, France
| | - Matti Wahlsten
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of HelsinkiHelsinki, Finland
| | - Daniela Cardinale
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université BordeauxVillenace d’Ornon, France
| | - Jan Pille
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université BordeauxVillenace d’Ornon, France
- Bio-Organic Chemistry, Radboud UniversityNijmegen, Netherlands
| | - Jocelyne Walter
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université BordeauxVillenace d’Ornon, France
| | - Thierry Michon
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université BordeauxVillenace d’Ornon, France
- *Correspondence: Thierry Michon, ; Kristiina Mäkinen,
| | - Kristiina Mäkinen
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of HelsinkiHelsinki, Finland
- *Correspondence: Thierry Michon, ; Kristiina Mäkinen,
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15
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Nault L, Taofifenua C, Anne A, Chovin A, Demaille C, Besong-Ndika J, Cardinale D, Carette N, Michon T, Walter J. Electrochemical atomic force microscopy imaging of redox-immunomarked proteins on native potyviruses: from subparticle to single-protein resolution. ACS Nano 2015; 9:4911-4924. [PMID: 25905663 DOI: 10.1021/acsnano.5b00952] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We show herein that electrochemical atomic force microscopy (AFM-SECM), operated in molecule touching (Mt) mode and combined with redox immunomarking, enables the in situ mapping of the distribution of proteins on individual virus particles and makes localization of individual viral proteins possible. Acquisition of a topography image allows isolated virus particles to be identified and structurally characterized, while simultaneous acquisition of a current image allows the sought after protein, marked by redox antibodies, to be selectively located. We concomitantly show that Mt/AFM-SECM, due to its single-particle resolution, can also uniquely reveal the way redox functionalization endowed to viral particles is distributed both statistically among the viruses and spatially over individual virus particles. This possibility makes Mt/AFM-SECM a unique tool for viral nanotechnology.
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Affiliation(s)
- Laurent Nault
- †Laboratoire d'Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université, CNRS No 7591, Bâtiment Lavoisier, 15 rue Jean-Antoine de Baïf, 75205 Cedex 13 Paris, France
| | - Cécilia Taofifenua
- †Laboratoire d'Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université, CNRS No 7591, Bâtiment Lavoisier, 15 rue Jean-Antoine de Baïf, 75205 Cedex 13 Paris, France
| | - Agnès Anne
- †Laboratoire d'Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université, CNRS No 7591, Bâtiment Lavoisier, 15 rue Jean-Antoine de Baïf, 75205 Cedex 13 Paris, France
| | - Arnaud Chovin
- †Laboratoire d'Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université, CNRS No 7591, Bâtiment Lavoisier, 15 rue Jean-Antoine de Baïf, 75205 Cedex 13 Paris, France
| | - Christophe Demaille
- †Laboratoire d'Electrochimie Moléculaire, Université Paris Diderot, Sorbonne Paris Cité, Unité Mixte de Recherche Université, CNRS No 7591, Bâtiment Lavoisier, 15 rue Jean-Antoine de Baïf, 75205 Cedex 13 Paris, France
| | - Jane Besong-Ndika
- ‡UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71 av. Edouard Bourlaux, 20032-33882 Cedex Villenave d'Ornon, France
- §Department of Food and Environmental Sciences, University of Helsinki, Latokartanonkaari 11, FI-00014 Helsinki, Finland
| | - Daniela Cardinale
- ‡UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71 av. Edouard Bourlaux, 20032-33882 Cedex Villenave d'Ornon, France
| | - Noëlle Carette
- ‡UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71 av. Edouard Bourlaux, 20032-33882 Cedex Villenave d'Ornon, France
| | - Thierry Michon
- ‡UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71 av. Edouard Bourlaux, 20032-33882 Cedex Villenave d'Ornon, France
| | - Jocelyne Walter
- ‡UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71 av. Edouard Bourlaux, 20032-33882 Cedex Villenave d'Ornon, France
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16
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Besong-Ndika J, Ivanov KI, Hafrèn A, Michon T, Mäkinen K. Cotranslational coat protein-mediated inhibition of potyviral RNA translation. J Virol 2015; 89:4237-48. [PMID: 25631087 PMCID: PMC4442359 DOI: 10.1128/jvi.02915-14] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [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: 10/07/2014] [Accepted: 01/22/2015] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Potato virus A (PVA) is a single-stranded positive-sense RNA virus and a member of the family Potyviridae. The PVA coat protein (CP) has an intrinsic capacity to self-assemble into filamentous virus-like particles, but the mechanism responsible for the initiation of viral RNA encapsidation in vivo remains unclear. Apart from virion assembly, PVA CP is also involved in the inhibition of viral RNA translation. In this study, we show that CP inhibits PVA RNA translation in a dose-dependent manner, through a mechanism involving the CP-encoding region. Analysis of this region, however, failed to identify any RNA secondary structure(s) preferentially recognized by CP, suggesting that the inhibition depends on CP-CP rather than CP-RNA interactions. In agreement with this possibility, insertion of an in-frame stop codon upstream of the CP sequence led to a marked decrease in the inhibition of viral RNA translation. Based on these results, we propose a model in which the cotranslational interactions between excess CP accumulating in trans and CP translated from viral RNA in cis are required to initiate the translational repression. This model suggests a mechanism for how viral RNA can be sequestered from translation and specifically selected for encapsidation at the late stages of viral infection. IMPORTANCE The main functions of the CP during potyvirus infection are to protect viral RNA from degradation and to transport it locally, systemically, and from host to host. Although virion assembly is a key step in the potyviral infectious cycle, little is known about how it is initiated and how viral RNA is selected for encapsidation. The results presented here suggest that CP-CP rather than CP-RNA interactions are predominantly involved in the sequestration of viral RNA away from translation. We propose that the cotranslational nature of these interactions may represent a mechanism for the selection of viral RNA for encapsidation. A better understanding of the mechanism of virion assembly may lead to development of crops resistant to potyviruses at the level of viral RNA encapsidation, thereby reducing the detrimental effects of potyvirus infections on food production.
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Affiliation(s)
- Jane Besong-Ndika
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, Villenave d'Ornon Cedex, France
| | - Konstantin I Ivanov
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Anders Hafrèn
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Thierry Michon
- UMR 1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, Villenave d'Ornon Cedex, France
| | - Kristiina Mäkinen
- Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
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17
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Pille J, Cardinale D, Carette N, Di Primo C, Besong-Ndika J, Walter J, Lecoq H, van Eldijk MB, Smits FCM, Schoffelen S, van Hest JCM, Mäkinen K, Michon T. General Strategy for Ordered Noncovalent Protein Assembly on Well-Defined Nanoscaffolds. Biomacromolecules 2013; 14:4351-9. [DOI: 10.1021/bm401291u] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jan Pille
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
- Institute
for Molecules and Materials, Radboud University Nijmegen, Huygens Building,
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Daniela Cardinale
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
| | - Noëlle Carette
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
| | | | - Jane Besong-Ndika
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
- Department
of Food and Environmental Sciences, Latokartanonkaari 11, FI-00014 University of Helsinki, Finland
| | - Jocelyne Walter
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
- CNRS, Délégation Aquitaine, esplanade des Arts et Métiers, F-33402
Talence Cedex, France
| | - Hervé Lecoq
- UR
407 pathologie Végétale, INRA, F-84140 Montfavet, France
| | - Mark B. van Eldijk
- Institute
for Molecules and Materials, Radboud University Nijmegen, Huygens Building,
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Ferdinanda C. M. Smits
- Institute
for Molecules and Materials, Radboud University Nijmegen, Huygens Building,
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Sanne Schoffelen
- Institute
for Molecules and Materials, Radboud University Nijmegen, Huygens Building,
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Jan C. M. van Hest
- Institute
for Molecules and Materials, Radboud University Nijmegen, Huygens Building,
Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Kristiina Mäkinen
- Department
of Food and Environmental Sciences, Latokartanonkaari 11, FI-00014 University of Helsinki, Finland
| | - Thierry Michon
- UMR
1332 Biologie du Fruit et Pathologie, INRA-Université Bordeaux 2, 71, av. Edouard
Bourlaux, CS 20032-33882 Villenave d’Ornon Cedex, France
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18
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Tavert-Roudet G, Abdul-Razzak A, Doublet B, Walter J, Delaunay T, German-Retana S, Michon T, Le Gall O, Candresse T. The C terminus of lettuce mosaic potyvirus cylindrical inclusion helicase interacts with the viral VPg and with lettuce translation eukaryotic initiation factor 4E. J Gen Virol 2012; 93:184-193. [PMID: 21918009 DOI: 10.1099/vir.0.035881-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [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: 12/21/2022] Open
Abstract
Recessive resistance to lettuce mosaic virus (LMV) is conferred in lettuce by the mo1 gene, encoding the eukaryotic translation initiation factor 4E (eIF4E). The C terminus of the viral cylindrical inclusion helicase (CI-Cter), together with the VPg, is involved directly in overcoming mo1 resistance. In this study, recombinant LMV VPg and CI-Cter proteins from wild-type or resistance-breaking isolates were expressed and purified from Escherichia coli. The allelic forms of eIF4E from susceptible or resistant lettuce cultivars were produced similarly and these proteins were used in ELISA-based assays to demonstrate the in vitro binding of the various forms of LMV CI-Cter to both lettuce eIF4E and LMV VPg proteins. All combinations tested displayed significant and specific interactions, and the interaction between the C-terminal part of the LMV CI and eIF4E was confirmed in vivo in bimolecular fluorescence complementation assays. Higher interaction signals for both CI-eIF4E and CI-VPg were observed for LMV-E, indicating that the eIF4E interaction network involving CI and VPg appears to be stronger in the case of this resistance-breaking isolate. This could suggest the need for a minimal interaction threshold for infection success in resistant lettuce, but more precise measurement of the interaction parameters linking eIF4E, VPg and CI is needed in order to reinforce such a hypothesis.
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Affiliation(s)
- G Tavert-Roudet
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - A Abdul-Razzak
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - B Doublet
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - J Walter
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - T Delaunay
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - S German-Retana
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - T Michon
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - O Le Gall
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
| | - T Candresse
- Equipe de Virologie, INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, BP81, 33883 Villenave d'Ornon cedex, France
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Dielen AS, Sassaki FT, Walter J, Michon T, Ménard G, Pagny G, Krause-Sakate R, Maia IDG, Badaoui S, Le Gall O, Candresse T, German-Retana S. The 20S proteasome α5 subunit of Arabidopsis thaliana carries an RNase activity and interacts in planta with the lettuce mosaic potyvirus HcPro protein. Mol Plant Pathol 2011; 12:137-50. [PMID: 21199564 PMCID: PMC6640220 DOI: 10.1111/j.1364-3703.2010.00654.x] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In plants, the ubiquitin/26S proteasome system (UPS) plays a central role in protein degradation and is involved in many steps of defence mechanisms, regardless of the types of pathogen targeted. In addition to its proteolytic activities, the UPS ribonuclease (RNase) activity, previously detected in 20S proteasome preparations from cauliflower and sunflower (Helianthus annuus), has been shown to specifically target plant viral RNAs in vitro. In this study, we show that recombinant Arabidopsis thaliana proteasomal α(5) subunit expressed in Escherichia coli harbours an RNase activity that degrades Tobacco mosaic virus (TMV, Tobamovirus)- and Lettuce mosaic virus (LMV, Potyvirus)-derived RNAs in vitro. The analysis of mutated forms of the α(5) subunit demonstrated that mutation of a glutamic acid at position 110 affects RNase activity. Furthermore, it was demonstrated, using a bimolecular fluorescence complement assay, that the multifunctional helper component proteinase (HcPro) of LMV, already known to interfere with the 20S proteasome RNase activity in vitro, can interact in vivo with the recombinant α(5) subunit. Further experiments demonstrated that, in LMV-infected lettuce cells, α(5) is partially relocalized to HcPro-containing infection-specific inclusions. Susceptibility analyses of Arabidopsis mutants, knocked out for each At-PAE gene encoding α(5) , showed that one (KO-pae1) of the two mutants exhibited a significantly increased susceptibility to LMV infection. Taken together, these results extend to A. thaliana α(5) the range of HcPro-interacting proteasomal subunits, and suggest that HcPro may modulate its associated RNase activity which may contribute to an antiviral response.
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Affiliation(s)
- Anne-Sophie Dielen
- Interactions Plante-Virus, UMR GDPP 1090, INRA Université de Bordeaux 2, BP 81, F-33883 Villenave d'Ornon Cedex, France
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Hébrard E, Bessin Y, Michon T, Longhi S, Uversky VN, Delalande F, Van Dorsselaer A, Romero P, Walter J, Declerk N, Fargette D. Intrinsic disorder in Viral Proteins Genome-Linked: experimental and predictive analyses. Virol J 2009; 6:23. [PMID: 19220875 PMCID: PMC2649914 DOI: 10.1186/1743-422x-6-23] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Accepted: 02/16/2009] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND VPgs are viral proteins linked to the 5' end of some viral genomes. Interactions between several VPgs and eukaryotic translation initiation factors eIF4Es are critical for plant infection. However, VPgs are not restricted to phytoviruses, being also involved in genome replication and protein translation of several animal viruses. To date, structural data are still limited to small picornaviral VPgs. Recently three phytoviral VPgs were shown to be natively unfolded proteins. RESULTS In this paper, we report the bacterial expression, purification and biochemical characterization of two phytoviral VPgs, namely the VPgs of Rice yellow mottle virus (RYMV, genus Sobemovirus) and Lettuce mosaic virus (LMV, genus Potyvirus). Using far-UV circular dichroism and size exclusion chromatography, we show that RYMV and LMV VPgs are predominantly or partly unstructured in solution, respectively. Using several disorder predictors, we show that both proteins are predicted to possess disordered regions. We next extend theses results to 14 VPgs representative of the viral diversity. Disordered regions were predicted in all VPg sequences whatever the genus and the family. CONCLUSION Based on these results, we propose that intrinsic disorder is a common feature of VPgs. The functional role of intrinsic disorder is discussed in light of the biological roles of VPgs.
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Affiliation(s)
- Eugénie Hébrard
- UMR 1097 Résistance des Plantes aux Bio-agresseurs, IRD, CIRAD, Université de Montpellier II, BP 64501, 34394 Montpellier cedex 5, France
| | - Yannick Bessin
- Centre de Biochimie Structurale, UMR 5048, 29 rue de Navacelles, 34090 Montpellier, France
| | - Thierry Michon
- UMR1090 Génomique Diversité Pouvoir Pathogène, INRA, Université de Bordeaux 2, F-33883 Villenave D'Ornon, France
| | - Sonia Longhi
- UMR 6098 Architecture et Fonction des Macromolécules Biologiques, CNRS, Universités Aix-Marseille I et II, Campus de Luminy, 13288 Marseille Cedex 09, France
| | - Vladimir N Uversky
- Center for Computational Biology and Bioinformatics, Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Institute for Biological Instrumentation, Russian Academy of Sciences, 142290 Pushchino, Moscow Region, Russia
| | - François Delalande
- Laboratoire de Spectrométrie de Masse Bio-Organique, ECPM, 67087 Strasbourg, France
| | - Alain Van Dorsselaer
- Laboratoire de Spectrométrie de Masse Bio-Organique, ECPM, 67087 Strasbourg, France
| | - Pedro Romero
- Center for Computational Biology and Bioinformatics, Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Jocelyne Walter
- UMR1090 Génomique Diversité Pouvoir Pathogène, INRA, Université de Bordeaux 2, F-33883 Villenave D'Ornon, France
| | - Nathalie Declerk
- Centre de Biochimie Structurale, UMR 5048, 29 rue de Navacelles, 34090 Montpellier, France
| | - Denis Fargette
- UMR 1097 Résistance des Plantes aux Bio-agresseurs, IRD, CIRAD, Université de Montpellier II, BP 64501, 34394 Montpellier cedex 5, France
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German-Retana S, Walter J, Doublet B, Roudet-Tavert G, Nicaise V, Lecampion C, Houvenaghel MC, Robaglia C, Michon T, Le Gall O. Mutational analysis of plant cap-binding protein eIF4E reveals key amino acids involved in biochemical functions and potyvirus infection. J Virol 2008; 82:7601-12. [PMID: 18480444 PMCID: PMC2493313 DOI: 10.1128/jvi.00209-08] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Accepted: 05/06/2008] [Indexed: 12/16/2022] Open
Abstract
The eukaryotic translation initiation factor 4E (eIF4E) (the cap-binding protein) is involved in natural resistance against several potyviruses in plants. In lettuce, the recessive resistance genes mo1(1) and mo1(2) against Lettuce mosaic virus (LMV) are alleles coding for forms of eIF4E unable, or less effective, to support virus accumulation. A recombinant LMV expressing the eIF4E of a susceptible lettuce variety from its genome was able to produce symptoms in mo1(1) or mo1(2) varieties. In order to identify the eIF4E amino acid residues necessary for viral infection, we constructed recombinant LMV expressing eIF4E with point mutations affecting various amino acids and compared the abilities of these eIF4E mutants to complement LMV infection in resistant plants. Three types of mutations were produced in order to affect different biochemical functions of eIF4E: cap binding, eIF4G binding, and putative interaction with other virus or host proteins. Several mutations severely reduced the ability of eIF4E to complement LMV accumulation in a resistant host and impeded essential eIF4E functions in yeast. However, the ability of eIF4E to bind a cap analogue or to fully interact with eIF4G appeared unlinked to LMV infection. In addition to providing a functional mutational map of a plant eIF4E, this suggests that the role of eIF4E in the LMV cycle might be distinct from its physiological function in cellular mRNA translation.
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Affiliation(s)
- Sylvie German-Retana
- Interactions Plante-Virus, UMR GDPP 1090, INRA Université de Bordeaux 2, BP 81, F-33883 Villenave d'Ornon Cedex, France.
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Fernández-Trillo F, van Hest JCM, Thies JC, Michon T, Weberskirch R, Cameron NR. Fine-tuning the transition temperature of a stimuli-responsive polymer by a simple blending procedure. Chem Commun (Camb) 2008:2230-2. [DOI: 10.1039/b800266e] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fernández-Trillo F, Duréault A, Bayley JPM, van Hest JCM, Thies JC, Michon T, Weberskirch R, Cameron NR. Elastin-Based Side-Chain Polymers: Improved Synthesis via RAFT and Stimulus Responsive Behavior. Macromolecules 2007. [DOI: 10.1021/ma070527x] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Francisco Fernández-Trillo
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Alex Duréault
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Jonathan P. M. Bayley
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Jan C. M. van Hest
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Jens C. Thies
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Thierry Michon
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Ralf Weberskirch
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
| | - Neil R. Cameron
- Department of Chemistry and Interdisciplinary Research Centre (IRC) in Polymer Science and Technology, Durham University, South Road, Durham, DH1 3LE UK; Organic Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525ED Nijmegen, The Netherlands; Performance MaterialsChemistry & Technology, DSM Research Campus Geleen, Urmonderbaan 22, 6167 RD Geleen, The Netherlands; Interactions Plante Virus, INRA, UMR GDPP, IBVM, BP 81, 33883 Villenave d'Ornon Cedex, France
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Carette N, Engelkamp H, Akpa E, Pierre SJ, Cameron NR, Christianen PCM, Maan JC, Thies JC, Weberskirch R, Rowan AE, Nolte RJM, Michon T, Van Hest JCM. A virus-based biocatalyst. Nat Nanotechnol 2007; 2:226-9. [PMID: 18654267 DOI: 10.1038/nnano.2007.76] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2006] [Accepted: 02/27/2007] [Indexed: 05/20/2023]
Abstract
Virus particles are probably the most precisely defined nanometre-sized objects that can be formed by protein self-assembly. Although their natural function is the storage and transport of genetic material, they have more recently been applied as scaffolds for mineralization and as containers for the encapsulation of inorganic compounds. The reproductive power of viruses has been used to develop versatile analytical methods, such as phage display, for the selection and identification of (bio)active compounds. To date, the combined use of self-assembly and reproduction has not been used for the construction of catalytic systems. Here we describe a self-assembled system based on a plant virus that has its coat protein genetically modified to provide it with a lipase enzyme. Using single-object and bulk catalytic studies, we prove that the virus-anchored lipase molecules are catalytically active. This anchored biocatalyst, unlike man-made supported catalysts, has the capability to reproduce itself in vivo, generating many independent catalytically active copies.
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Affiliation(s)
- Noëlle Carette
- Interactions Plante Virus, UMR GDPP, IBVM, INRA, BP 81, F-33883, Villenave d'Ornon, France
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Roudet-Tavert G, Michon T, Walter J, Delaunay T, Redondo E, Le Gall O. Central domain of a potyvirus VPg is involved in the interaction with the host translation initiation factor eIF4E and the viral protein HcPro. J Gen Virol 2007; 88:1029-1033. [PMID: 17325377 DOI: 10.1099/vir.0.82501-0] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [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: 11/18/2022] Open
Abstract
Using recombinant proteins produced in bacteria or in infected plants, interactions between the VPg and HcPro of Lettuce mosaic potyvirus (LMV) and between LMV VPg and the lettuce translation initiation factor 4E, the cap-binding protein (eIF4E), were demonstrated in vitro. Interaction with eIF4E and HcPro both involved the same VPg central domain. The structure of this domain in the VPg context was predicted to include an amphiphilic alpha-helix, with the amino acids related to biological functions in various potyviruses exposed at the hydrophilic side.
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Affiliation(s)
- G Roudet-Tavert
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
| | - T Michon
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
| | - J Walter
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
| | - T Delaunay
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
| | - E Redondo
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
| | - O Le Gall
- IPV, UMR GDPP INRA-Bordeaux 2, IBVM, BP 81, F-33883 Villenave d'Ornon Cedex, France
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26
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Michon T, Estevez Y, Walter J, German-Retana S, Le Gall O. The potyviral virus genome-linked protein VPg forms a ternary complex with the eukaryotic initiation factors eIF4E and eIF4G and reduces eIF4E affinity for a mRNA cap analogue. FEBS J 2006; 273:1312-22. [PMID: 16519694 DOI: 10.1111/j.1742-4658.2006.05156.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [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: 11/28/2022]
Abstract
The virus protein linked to the genome (VPg) of plant potyviruses is a 25-kDa protein covalently attached to the genomic RNA 5' end. It was previously reported that VPg binds specifically to eIF4E, the mRNAcap-binding protein of the eukaryotic translation initiation complex. We performed a spectroscopic study of the interactions between lettuce eIF4E and VPg from lettuce mosaic virus (LMV). The cap analogue m7GDP and VPg bind to eIF4E at two distinct sites with similar affinity (K(d) = 0.3 microm). A deeper examination of the interaction pathway showed that the binding of one ligand induces a decrease in the affinity for the other by a factor of 15. GST pull-down experiments from plant extracts revealed that VPg can specifically trap eIF4G, the central component of the complex required for the initiation of protein translation. Our data suggest that eIF4G recruitment by VPg is indirectly mediated through VPg-eIF4E association. The strength of interaction between eIF4E and pep4G, the eIF4E-binding domain on eIF4G, was increased significantly by VPg. Taken together these quantitative data show that VPg is an efficient modulator of eIF4E biochemical functions.
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Affiliation(s)
- Thierry Michon
- Interactions Plante-Virus, UMR GDPP INRA-Bordeaux 2, Institut de Biologie Végétale Moléculaire, Villenave d'Ornon, France.
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Abstract
The unsaturated amino acid 2-amino-3-methyl-4-pentenoic acid (E-Ile) was prepared in the form of its (2S,3S),(2R,3R) and (2S,3R),(2R,3S) stereoisomeric pairs. The translational activities of SS-E-Ile and SR-E-Ile were assessed in an E. coli strain rendered auxotrophic for isoleucine. SS-E-Ile was incorporated into the test protein mouse dihydrofolate reductase (mDHFR) in place of isoleucine at a rate of up to 72 %; SR-E-Ile yielded no conclusive evidence for incorporation. ATP/PPi exchange assays indicated that SS-E-Ile was activated by the isoleucyl-tRNA synthetase at a rate comparable to that characteristic of isoleucine; SR-E-Ile was activated approximately 100-times more slowly than SS-E-Ile.
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Affiliation(s)
- Marissa L Mock
- Division of Chemistry and Chemical Engineering, California Institute of Technology, MC 210-41, Pasadena, California 91125, USA
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28
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Douliez JP, Michon T, Marion D. Steady-state tyrosine fluorescence to study the lipid-binding properties of a wheat non-specific lipid-transfer protein (nsLTP1). Biochim Biophys Acta 2000; 1467:65-72. [PMID: 10930509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
The binding properties of a wheat non-specific lipid-transfer protein (nsLTP1) for different mono- and diacylated lipids was investigated. Lipids varied by their chain length, unsaturation and/or polar head group. In the case of fatty acid or lysophospholipid with a C10 chain length, no interaction can be measured, while poor affinity is reported for a C12 chain length. The dissociation constant (Kd) is about 0.5 microM independent of chain length from C14 to C18. The same affinity is obtained for C18 fatty acids with one or two unsaturations, whatever the cis-trans double bond isomery. In all cases, the number of binding sites, n, by protein ranges between 1.6 and 1.9, suggesting that two lipids can fit within the protein. omega-Hydroxy-palmitic acid, a natural monomer of cutin polymer, is found to interact with nsLTP1 with a Kd of 1 microM and n = 2. In contrast with previous data that reported the binding of the anionic diacylated phospholipid, DMPG (Sodano et al., FEBS Lett. 416 (1997) 130-134), nsLTP1 is not able to bind dimyristoylphosphatidylcholine, dimyristoylphosphatidic acid, palmitoyl-oleoylphosphatidylcholine or palmitoyl-oleoylphosphatidylglycerol added as liposomes or solubilized in ethanol. However, when both nsLTP1 and lipids are first solubilized in methanol, and then in the buffer, it was evidenced that the protein can bind these lipids. These results suggest that lipid-lipid interactions play an essential role in the binding process of plant nsLTP1 as previously mentioned for other lipid-transfer proteins.
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Affiliation(s)
- J P Douliez
- Laboratoire de Biochimie et Technologie des Protéines, INRA, Nantes, France
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Douliez JP, Michon T, Marion D. Steady-state tyrosine fluorescence to study the lipid-binding properties of a wheat non-specific lipid-transfer protein (nsLTP1). Biochimica et Biophysica Acta (BBA) - Biomembranes 2000. [DOI: 10.1016/s0005-2736(00)00197-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Michon T, Wang W, Ferrasson E, Gueguen J. Wheat prolamine crosslinking through dityrosine formation catalyzed by peroxidases: improvement in the modification of a poorly accessible substrate by "indirect" catalysis. Biotechnol Bioeng 1999; 63:449-58. [PMID: 10099625 DOI: 10.1002/(sici)1097-0290(19990520)63:4<449::aid-bit8>3.0.co;2-m] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
"Enzyme-assisted" oxidative polymerization of wheat gliadins was performed in an attempt to obtain new protein-based networks. Two plant peroxidases (soybean and horseradish) were used to induce the dimerization of tyrosine residues. The results show that tyrosines are poorly modified by these enzymes in an aqueous medium (dityrosine corresponded to 2% of the total amount of tyrosine). Two approaches were tested to overcome problems relating to accessibility to the target tyrosines: First, the efficiency of protein crosslinking via tyrosine-tyrosine aromatic ring condensation was enhanced in water when the proteins were oxidized by a fungus peroxidase (manganese-dependent peroxidase from Phanerochaete chrysosporium), which acts according to an indirect catalysis mechanism (up to 12% of the total amount of tyrosine is recovered under a dimeric form). Second, when the gliadins were dispersed in a water/dioxane (3/1) mixed solvent system, the tyrosines were more accessible on the protein surface, and similar yields were obtained with both types of peroxidase. The two types of catalysis (contact and indirect) are considered from the standpoint of the accessibility of the target residues. Enzymatic oxidations were also performed on synthetic peptides mimicking the repeatitive domains of gliadins. The results show that exposure of tyrosine to the solvent may not be sufficient to induce dityrosine formation. The mechanical properties of some films obtained from peroxidase-treated gliadins were investigated to correlate protein crosslinking with a potential application. One effect of the enzymatic treatment was to increase the tensile strength of the films. Copyright 1999 John Wiley & Sons, Inc.
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Affiliation(s)
- T Michon
- Division of Chemical Engineering 210-41 California Institute of Technology 1200E, California Boulevard, Pasadena, California 91125, USA
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Wang W, Noël S, Desmadril M, Guéguen J, Michon T. Kinetic evidence for the formation of a Michaelis-Menten-like complex between horseradish peroxidase compound II and di-(N-acetyl-L-tyrosine). Biochem J 1999; 340 ( Pt 1):329-36. [PMID: 10229689 PMCID: PMC1220252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
The formation of a reversible adsorption complex between a dimer of N-acetyl-L-tyrosine [di-(N-acetyl-L-tyrosine), (NAT)2] and horseradish peroxidase (HRP) compound II (CII) was demonstrated using a kinetic approach. A specific KIIm value (0.58 mM) was deduced for this step from stopped-flow measurements. The dimerization of the dipeptide Gly-Tyr was analysed at the steady state and compared with (NAT)2 dimerization [(NAT)2-->(NAT)4]. A saturation of the enzyme was observed for both substrates within their range of solubility. In each case the rate of dimerization reflected the rate-limiting step of compound II reduction to the native HRP (E) (kappcat/Kappm approximately kII-->E). The kappcat values for (Gly-Tyr)2 and (NAT)4 formation were 254 s-1 and 3.6 s-1 respectively. The KappM value of Gly-Tyr was 24 mM. It was observed that the value (0.7 mM) for (NAT)2 was close both to its specific KIIm value for the second step of reduction (CII-->E) and to its thermodynamic dissociation constant (Kd=0.7 mM) with the resting form of the enzyme. As (NAT)2 was a tighter ligand but a poorer substrate than Gly-Tyr, a steady-state kinetic study was performed in the presence of both substrates. A kinetic model which includes an enzyme-substrate adsorption prior to each of the two steps of reduction was derived. This one agreed reasonably well with the experimental data.
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Affiliation(s)
- W Wang
- Department of Cellular and Molecular Pharmacology, University of California San Francisco, Box 0450, San Francisco, CA 94143-0448, USA
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Dastych J, Chróscielewska M, Michon T, Wyczólkowska J. Histamine content and mast cell number in tissues of mutant mice of (mi/mi) genotype. Inflamm Res 1999; 48 Suppl 1:S31-2. [PMID: 10350149 DOI: 10.1007/s000110050385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- J Dastych
- Institute of Biogenic Amines, Polish Academy of Sciences, Lodz
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Dastych J, Kolago B, Michon T, Zwolinska A, Wyczólkowska J. Mercuric chloride releases preformed mediators from mast cells of the mouse and rat. Inflamm Res 1999; 48 Suppl 1:S33-4. [PMID: 10350150 DOI: 10.1007/s000110050386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- J Dastych
- Institute of Biogenic Amines, Polish Academy of Sciences, Lodz
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Elmorjani K, Thiévin M, Michon T, Popineau Y, Hallet JN, Guéguen J. Synthetic genes specifying periodic polymers modelled on the repetitive domain of wheat gliadins: conception and expression. Biochem Biophys Res Commun 1997; 239:240-6. [PMID: 9345302 DOI: 10.1006/bbrc.1997.7464] [Citation(s) in RCA: 21] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In order to optimise new polypeptide based biomaterials, we developed a procedure for producing homoblock polypeptides using recombinant DNA technology. Synthetic genes encoding periodic polypeptides modelled on the consensus sequence of wheat gliadins (a family of wheat storage proteins) were devised to be expressed in Escherichia coli. The construction strategy followed allows the construction of three genes encoding 8, 16, and 32 copies of the PQQPY module. The optimal expression conditions in the enterobacteria were established and a convenient purification procedure was shown to be useful in recovery of sizable amounts of strictly periodic polypeptides. The identities of the synthesized polypeptides were assessed using positive cross reactions to antibodies raised against a synthetic decapeptide (PQQPYPQQPA) and amino acid composition was determined as well.
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Affiliation(s)
- K Elmorjani
- Laboratoire de Biochimie et de Technologie des Protéines, INRA, Nantes, France.
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Michon T, Chenu M, Kellershon N, Desmadril M, Guéguen J. Horseradish peroxidase oxidation of tyrosine-containing peptides and their subsequent polymerization: a kinetic study. Biochemistry 1997; 36:8504-13. [PMID: 9214295 DOI: 10.1021/bi963168z] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.2] [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: 02/04/2023]
Abstract
Tyrosine-containing model peptides were oxidized by horseradish peroxidase (HRP). This led to a peptide polymerization via condensation of the aromatic rings. Dimers, trimers, and tetramers (depending on the peptide length and on the position of the tyrosine in the sequence) were identified by electron spray mass spectroscopy. The second-order rate constants of the second step of the HRP reduction (CII --> E) was decreased by the presence of a positively charged amino group in the vicinity of the aromatic ring as determined by stopped flow measurements [k3 = 19 398 M-1 s-1 and k3 = 1016 M-1 s-1 for N-acetyltyrosine (NAT) and l-Tyr oxidations, respectively]. High-performance liquid chromatography was used to follow the kinetics of polymerization of some model peptides after their enzymatic oxidation. The first polymerization products exhibited a strong inhibitory effect toward further oxidation by HRP. This effect was not observed when using manganese-dependent peroxidase (MnP) which does not bind directly to the tyrosine residue but rather acts as a "distant catalyst". Saturation of the HRP was achieved with Pro-Gln-Gln-Pro-Tyr (kcat = 58 s-1, = 2.1 mM), NAT (kcat = 94 s-1, = 5.6 mM), and Gly-Tyr (kcat = 175 s-1, = 10.8 mM). Analysis of steady state kinetics of the reaction showed that the dimers formed initially behaved like competitive inhibitors. The value of the dissociation constant between HRP and dimers was 20 microM. A simplified model which accounts for these observations, including the formation of a Michaelis-Menten-like complex involving the donor and enzyme, is proposed and discussed.
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Affiliation(s)
- T Michon
- Unité de Biochimie et de Technologie des Protéines, INRA rue de la G-eraudi-ere, BP 1627, 44316 Nantes, France.
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Guérin-Marchand C, Michon T, Kolago B, Marchand F, Weyer A, Wyczolkowska J. Kinetics of protein phosphorylation and mediator secretion following antigen challenge of mast cells sensitized with monoclonal IgE or with reaginic serum. Inflamm Res 1997; 46 Suppl 1:S21-2. [PMID: 9098746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Guérin-Marchand C, Michon T, Kolago B, Marchand F, Weyer A, Wyczolkowska J. Kinetics of protein phosphorylation and mediator secretion following antigen challenge of mast cells sensitized with monoclonal IgE or with reaginic serum. Inflamm Res 1997; 46:21-2. [PMID: 27517984 DOI: 10.1007/s000110050030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- C Guérin-Marchand
- Unité d'Immuno-Allergie, Institut Pasteur, 28 rue du Docteur Roux, F-75724 Paris Cedex 15, France, , , , , , FR
| | - T Michon
- Dept. of Biogenic Amines, Polish Academy of Sciences, Tylna 3, PL-90-950 Lodz, Poland, , , , , , PL
| | - B Kolago
- Dept. of Biogenic Amines, Polish Academy of Sciences, Tylna 3, PL-90-950 Lodz, Poland, , , , , , PL
| | - F Marchand
- Unité d'Immuno-Allergie, Institut Pasteur, 28 rue du Docteur Roux, F-75724 Paris Cedex 15, France, , , , , , FR
| | - A Weyer
- Unité d'Immuno-Allergie, Institut Pasteur, 28 rue du Docteur Roux, F-75724 Paris Cedex 15, France, , , , , , FR
| | - J Wyczolkowska
- Dept. of Biogenic Amines, Polish Academy of Sciences, Tylna 3, PL-90-950 Lodz, Poland, , , , , , PL
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Pignol D, Gaboriaud C, Michon T, Kerfelec B, Chapus C, Fontecilla-Camps JC. Crystal structure of bovine procarboxypeptidase A-S6 subunit III, a highly structured truncated zymogen E. EMBO J 1994; 13:1763-71. [PMID: 8168476 PMCID: PMC395015 DOI: 10.1002/j.1460-2075.1994.tb06444.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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: 11/10/2022] Open
Abstract
Subunit III, a defective serine endopeptidase lacking the typical N-terminal hydrophobic dipeptide is secreted by the pancreas of ruminant species as part of the bovine ternary complex procarboxypeptidase A-S6. Two monoclinic crystal forms were obtained and subsequently used to solve its X-ray structure. The highest resolution model of subunit III was refined at 1.7 A resolution to a crystallographic R-factor of 18.4%, with r.m.s. bond deviations from ideality of 0.012 A. About 80% of the model presents the characteristic architecture of trypsin-like proteases. The remaining zones, however, have well-defined, unique conformations. The regions from residues 70 to 80 and from 140 to 155 present maximum distances of 16 and 18 A relative to serine proteases and zymogens. Comparisons with the structures of porcine elastase 1 and chymotrypsinogen A indicate that the specific binding pocket of subunit III adopts a zymogen-like conformation and thus provide a basis for its inactivity. In general, the structural analysis of subunit III strongly suggests that it corresponds to a truncated version of a new class of highly structured elastase-like zymogen molecules. Based on the structures of subunit III and elastase 1, it is concluded that large concerted movements are necessary for the activation of zymogen E.
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Affiliation(s)
- D Pignol
- Laboratoire de Cristallographie et de Cristallogénès des Protéines, Institut de Biologie Structurale, Grenoble, France
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Michon T, Granon S, Sauve P, Chapus C. The activation peptide of pancreatic procarboxypeptidase A is the keystone of the bovine procarboxypeptidase A-S6 ternary complex. Biochem Biophys Res Commun 1991; 181:449-55. [PMID: 1958213 DOI: 10.1016/s0006-291x(05)81440-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [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: 12/29/2022]
Abstract
In some ruminant species, pancreatic procarboxypeptidase A is the central element of a ternary complex involving two other components, a C-type chymotrypsinogen and an inactive protease E. Although the complex is devoted to protein digestion, the fate of this system upon activation of its constituent subunits has, as yet, not been clearly established. In this paper, the activation peptide of procarboxypeptidase A is shown to play a key role in the association of the three subunits and a model is proposed for the in vivo function of the complex.
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Affiliation(s)
- T Michon
- Centre de Biochimie et de Biologie Moléculaire du CNRS, Marseille, France
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Michon T, Sari JC, Granon S, Kerfelec B, Chapus C. Microcalorimetric investigation of the interactions between the subunits of the bovine pancreatic procarboxypeptidase A-S6 complex. Eur J Biochem 1991; 201:217-22. [PMID: 1915366 DOI: 10.1111/j.1432-1033.1991.tb16277.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A complete microcalorimetric investigation of the interactions between the native subunits of the bovine pancreatic procarboxypeptidase A-S6 ternary complex has been performed. All the association constants and thermodynamic parameters associated with the reactions forming the various complexes have been determined. The influence of pH and ionic strength on the binding reactions has been investigated. Interestingly, the affinity between the subunits is not significantly modified by varying the ionic strength. In this respect, an enthalpy/entropy compensatory effect is observed for the binding of subunit III to subunit I when the ionic strength is increased, suggesting a physiological function for the association. The various pathways for formation of the ternary complex have been studied. Binding of subunit II (or III) to subunit I, the central element of the ternary complex, does not significantly modify the affinity of the other subunit for subunit I. From a thermodynamic point of view, the same final state is obtained whatever the pathway of ternary complex formation. This study is the first step of a kinetic investigation of the associated subunits.
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Affiliation(s)
- T Michon
- Laboratoire de Biochimie et Technologie des Protéines INRA, Nantes, France
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Abstract
In contrast to procarboxypeptidase B which has always been reported to be secreted by the pancreas as a monomer, procarboxypeptidase A occurs as a monomer and/or associated to one or two functionally different proteins, depending on the species. Recent studies showed that, in the human pancreatic secretion, procarboxypeptidase A is mainly secreted as a 44 kDa protein involved in at least three different binary complexes. As previously reported, two of these complexes associated procarboxypeptidase A to either a glycosylated truncated protease E or zymogen E. In this paper, we identified proelastase 2 as the partner of procarboxypeptidase A in the third complex, thus reporting for the first time the occurrence of a proelastase 2/procarboxypeptidase A binary complex in vertebrates. Moreover, from N-terminal sequence analyses, the 44 kDa procarboxypeptidase A involved in these complexes was identified as being of the A1 type. Only one type of procarboxypeptidase B, the B1 type, has been detected in the analyzed pancreatic juices, thus emphasizing the previously observed genetic differences between individuals.
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Affiliation(s)
- M Moulard
- Centre de Biochimie et de Biologie Moléculaire du CNRS, Marseílle, France
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Abstract
The three mitochondrially translated ATP synthase subunits of Saccharomyces cerevisiae were extracted from the enzyme and from whole mitochondria using an organic solvent mixture and then purified by reverse-phase HPLC. The amino acid composition of subunit 6 is close to the one predicted from the oli2 gene. The partial amino terminal sequence of subunit 6 reveals a post-translational cleavage site between the Thr-10 and Ser-11 residues of the precursor. Thus, mature subunit 6 contains 249 amino acid residues and displays a molecular mass of 27943 Da.
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Affiliation(s)
- T Michon
- Institut de Biochimie Cellulaire et Neurochimie du CNRS, Bordeaux, France
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Lugnier C, Michon T, Stoclet JC. Evolution of aortic and cardiac cyclic AMP phosphodiesterase during the onset of mineralpcorticoid hypertension in the rat [proceedings]. Br J Pharmacol 1976; 58:434P-435P. [PMID: 186145 PMCID: PMC1667543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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