1
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Kwong HS, Paloni M, Grandvuillemin L, Sirounian S, Ancelin A, Lai-Kee-Him J, Grimaldi M, Carivenc C, Lancey C, Ragan TJ, Hesketh EL, Balaguer P, Barducci A, Gruszczyk J, Bourguet W. Structural Insights into the Activation of Human Aryl Hydrocarbon Receptor by the Environmental Contaminant Benzo[a]pyrene and Structurally Related Compounds. J Mol Biol 2024; 436:168411. [PMID: 38135181 DOI: 10.1016/j.jmb.2023.168411] [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: 09/27/2023] [Revised: 12/10/2023] [Accepted: 12/18/2023] [Indexed: 12/24/2023]
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor belonging to the bHLH/PAS protein family and responding to hundreds of natural and chemical substances. It is primarily involved in the defense against chemical insults and bacterial infections or in the adaptive immune response, but also in the development of pathological conditions ranging from inflammatory to neoplastic disorders. Despite its prominent roles in many (patho)physiological processes, the lack of high-resolution structural data has precluded for thirty years an in-depth understanding of the structural mechanisms underlying ligand-binding specificity, promiscuity and activation of AHR. We recently reported a cryogenic electron microscopy (cryo-EM) structure of human AHR bound to the natural ligand indirubin, the chaperone Hsp90 and the co-chaperone XAP2 that provided the first experimental visualization of its ligand-binding PAS-B domain. Here, we report a 2.75 Å resolution structure of the AHR complex bound to the environmental pollutant benzo[a]pyrene (B[a]P). The structure substantiates the existence of a bipartite PAS-B ligand-binding pocket with a geometrically constrained primary binding site controlling ligand binding specificity and affinity, and a secondary binding site contributing to the binding promiscuity of AHR. We also report a docking study of B[a]P congeners that validates the B[a]P-bound PAS-B structure as a suitable model for accurate computational ligand binding assessment. Finally, comparison of our agonist-bound complex with the recently reported structures of mouse and fruit fly AHR PAS-B in different activation states suggests a ligand-induced loop conformational change potentially involved in the regulation of AHR function.
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Affiliation(s)
- Hok-Sau Kwong
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Matteo Paloni
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Loïc Grandvuillemin
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Savannah Sirounian
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Aurélie Ancelin
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Josephine Lai-Kee-Him
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Marina Grimaldi
- IRCM (Institut de Recherche en Cancérologie de Montpellier), Univ Montpellier, Inserm, ICM, Montpellier, France
| | - Coralie Carivenc
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Claudia Lancey
- Leicester Institute of Structural & Chemical Biology and Department of Molecular & Cell Biology, University of Leicester, Lancaster Rd, Leicester LE1 7HB, UK
| | - Timothy J Ragan
- Leicester Institute of Structural & Chemical Biology and Department of Molecular & Cell Biology, University of Leicester, Lancaster Rd, Leicester LE1 7HB, UK
| | - Emma L Hesketh
- Leicester Institute of Structural & Chemical Biology and Department of Molecular & Cell Biology, University of Leicester, Lancaster Rd, Leicester LE1 7HB, UK
| | - Patrick Balaguer
- IRCM (Institut de Recherche en Cancérologie de Montpellier), Univ Montpellier, Inserm, ICM, Montpellier, France
| | - Alessandro Barducci
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Jakub Gruszczyk
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France.
| | - William Bourguet
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France.
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2
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Gruszczyk J, Grandvuillemin L, Lai-Kee-Him J, Paloni M, Savva CG, Germain P, Grimaldi M, Boulahtouf A, Kwong HS, Bous J, Ancelin A, Bechara C, Barducci A, Balaguer P, Bourguet W. Cryo-EM structure of the agonist-bound Hsp90-XAP2-AHR cytosolic complex. Nat Commun 2022; 13:7010. [PMID: 36385050 PMCID: PMC9668932 DOI: 10.1038/s41467-022-34773-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/07/2022] [Indexed: 11/17/2022] Open
Abstract
The aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor that mediates a broad spectrum of (patho)physiological processes in response to numerous substances including pollutants, natural products and metabolites. However, the scarcity of structural data precludes understanding of how AHR is activated by such diverse compounds. Our 2.85 Å structure of the human indirubin-bound AHR complex with the chaperone Hsp90 and the co-chaperone XAP2, reported herein, reveals a closed conformation Hsp90 dimer with AHR threaded through its lumen and XAP2 serving as a brace. Importantly, we disclose the long-awaited structure of the AHR PAS-B domain revealing a unique organisation of the ligand-binding pocket and the structural determinants of ligand-binding specificity and promiscuity of the receptor. By providing structural details of the molecular initiating event leading to AHR activation, our study rationalises almost forty years of biochemical data and provides a framework for future mechanistic studies and structure-guided drug design.
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Affiliation(s)
- Jakub Gruszczyk
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France.
| | - Loïc Grandvuillemin
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Josephine Lai-Kee-Him
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Matteo Paloni
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Christos G Savva
- Leicester Institute of Structural & Chemical Biology and Department of Molecular & Cell Biology, University of Leicester, Leicester, UK
| | - Pierre Germain
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Marina Grimaldi
- IRCM (Institut de Recherche en Cancérologie de Montpellier), Inserm U1194, Univ Montpellier, ICM, Montpellier, France
| | - Abdelhay Boulahtouf
- IRCM (Institut de Recherche en Cancérologie de Montpellier), Inserm U1194, Univ Montpellier, ICM, Montpellier, France
| | - Hok-Sau Kwong
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Julien Bous
- Section of Receptor Biology & Signaling, Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Aurélie Ancelin
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Cherine Bechara
- IGF, University of Montpellier, CNRS, Inserm, Montpellier, France
- Institut Universitaire de France (IUF), Paris, France
| | - Alessandro Barducci
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France
| | - Patrick Balaguer
- IRCM (Institut de Recherche en Cancérologie de Montpellier), Inserm U1194, Univ Montpellier, ICM, Montpellier, France
| | - William Bourguet
- CBS (Centre de Biologie Structurale), Univ Montpellier, CNRS, Inserm, Montpellier, France.
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3
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Delfosse V, Huet T, Harrus D, Granell M, Bourguet M, Gardia-Parège C, Chiavarina B, Grimaldi M, Le Mével S, Blanc P, Huang D, Gruszczyk J, Demeneix B, Cianférani S, Fini JB, Balaguer P, Bourguet W. Mechanistic insights into the synergistic activation ofthe RXR–PXR heterodimer by endocrinedisruptor mixtures. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321092035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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4
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He WQ, Karl S, White MT, Nguitragool W, Monteiro W, Kuehn A, Gruszczyk J, França CT, Sattabongkot J, Lacerda MVG, Tham WH, Mueller I. Antibodies to Plasmodium vivax reticulocyte binding protein 2b are associated with protection against P. vivax malaria in populations living in low malaria transmission regions of Brazil and Thailand. PLoS Negl Trop Dis 2019; 13:e0007596. [PMID: 31425514 PMCID: PMC6726234 DOI: 10.1371/journal.pntd.0007596] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 10/01/2018] [Revised: 09/04/2019] [Accepted: 07/02/2019] [Indexed: 12/30/2022] Open
Abstract
Background The Plasmodium vivax Reticulocyte Binding Protein (PvRBP) family is involved in red blood cell recognition and members of this family are potential targets for antibodies that may block P. vivax invasion. To date, the acquisition of immunity against PvRBPs in low malaria transmission settings and in a broad age group of exposed individuals has not been investigated. Methodology/Principal findings Total IgG antibody levels to six members of the PvRBP family (PvRBP1a, PvRBP1b, PvRBP2a, PvRBP2b, a non-binding fragment of PvRBP2c (PvRBP2cNB) and PvRBP2-P2) were measured in samples collected from individuals living in two regions of low P. vivax endemicity in Brazil and Thailand. In both settings, levels of total IgG to PvRBP1a, PvRBP2b, PvRBP2cNB, and PvRBP2P-2 increased significantly with age (rho = 0.17–0.49; P<0.001). IgG responses to PvRBP1a, PvRBP2b and PvRBP2cNB were significantly higher in infected individuals by using Wilcoxon’s signed-rank test (P<0.001). Of the six PvRBPs examined, only antibodies to PvRBP2b were associated with protection against clinical malaria in both settings. Conclusion/Significance Our results indicate that PvRBP2b warrants further preclinical development as a blood-stage vaccine candidate against P. vivax. Total IgG responses to PvRBPs were also shown to be promising immunological markers of exposure to P. vivax infection. Plasmodium vivax preferentially invades young red blood cells called reticulocytes. Successful parasite invasion relies on the interaction between parasite ligands with human red blood cell receptors. The P. vivax reticulocyte binding protein family (PvRBP) plays a role in the invasion process. The role of PvRBP in the natural acquisition of immunity to P. vivax, especially in low transmission settings, is poorly understood. Using samples from longitudinal cohort studies from regions of low P. vivax endemicity in Brazil and Thailand, we showed that antibody responses to PvRBP1a, PvRBP2b, and PvRBP2cNB increased with age and were boosted during infection. In addition, higher antibody levels to PvRBP2b were strongly associated with a lower risk of clinical episodes of P. vivax. Based on these observations, we propose that PvRBP2b warrants further preclinical development as a blood-stage vaccine candidate against P. vivax.
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Affiliation(s)
- Wen-Qiang He
- Infection and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria Australia
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Stephan Karl
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
- Population Health and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Vector-borne Diseases Unit, Papua New Guinea Institute of Medical Research, Madang, Papua New Guinea
| | - Michael T. White
- Malaria Parasites and Hosts Unit, Department of Parasites & Insect Vectors, Institut Pasteur, Paris, France
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok Thailand
| | - Wuelton Monteiro
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
| | - Andrea Kuehn
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
- ISGlobal, Barcelona Centre for International Health Research (CRESIB), Hospital Clinic-Universitat de Barcelona, Barcelona, Spain
| | - Jakub Gruszczyk
- Infection and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria Australia
| | - Camila T. França
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
- Population Health and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Marcus V. G. Lacerda
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Amazonas, Brazil
| | - Wai-Hong Tham
- Infection and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria Australia
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Ivo Mueller
- Department of Medical Biology, University of Melbourne, Melbourne, Australia
- Population Health and Immunity Division, Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
- Malaria Parasites and Hosts Unit, Department of Parasites & Insect Vectors, Institut Pasteur, Paris, France
- * E-mail:
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5
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Loy DE, Plenderleith LJ, Sundararaman SA, Liu W, Gruszczyk J, Chen YJ, Trimboli S, Learn GH, MacLean OA, Morgan ALK, Li Y, Avitto AN, Giles J, Calvignac-Spencer S, Sachse A, Leendertz FH, Speede S, Ayouba A, Peeters M, Rayner JC, Tham WH, Sharp PM, Hahn BH. Evolutionary history of human Plasmodium vivax revealed by genome-wide analyses of related ape parasites. Proc Natl Acad Sci U S A 2018; 115:E8450-E8459. [PMID: 30127015 PMCID: PMC6130405 DOI: 10.1073/pnas.1810053115] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Wild-living African apes are endemically infected with parasites that are closely related to human Plasmodium vivax, a leading cause of malaria outside Africa. This finding suggests that the origin of P. vivax was in Africa, even though the parasite is now rare in humans there. To elucidate the emergence of human P. vivax and its relationship to the ape parasites, we analyzed genome sequence data of P. vivax strains infecting six chimpanzees and one gorilla from Cameroon, Gabon, and Côte d'Ivoire. We found that ape and human parasites share nearly identical core genomes, differing by only 2% of coding sequences. However, compared with the ape parasites, human strains of P. vivax exhibit about 10-fold less diversity and have a relative excess of nonsynonymous nucleotide polymorphisms, with site-frequency spectra suggesting they are subject to greatly relaxed purifying selection. These data suggest that human P. vivax has undergone an extreme bottleneck, followed by rapid population expansion. Investigating potential host-specificity determinants, we found that ape P. vivax parasites encode intact orthologs of three reticulocyte-binding protein genes (rbp2d, rbp2e, and rbp3), which are pseudogenes in all human P. vivax strains. However, binding studies of recombinant RBP2e and RBP3 proteins to human, chimpanzee, and gorilla erythrocytes revealed no evidence of host-specific barriers to red blood cell invasion. These data suggest that, from an ancient stock of P. vivax parasites capable of infecting both humans and apes, a severely bottlenecked lineage emerged out of Africa and underwent rapid population growth as it spread globally.
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Affiliation(s)
- Dorothy E Loy
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
- Department of Microbiology, University of Pennsylvania, Philadelphia, PA 19104
| | - Lindsey J Plenderleith
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
- Centre for Immunity, Infection and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
| | - Sesh A Sundararaman
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
- Department of Microbiology, University of Pennsylvania, Philadelphia, PA 19104
| | - Weimin Liu
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Jakub Gruszczyk
- Walter and Eliza Hall Institute of Medical Research, Parkville VIC 3052, Australia
| | - Yi-Jun Chen
- Centre for Immunity, Infection and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
- Department of Medical Biology, The University of Melbourne, Parkville VIC 3010, Australia
| | - Stephanie Trimboli
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Gerald H Learn
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Oscar A MacLean
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
- Centre for Immunity, Infection and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
| | - Alex L K Morgan
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
- Centre for Immunity, Infection and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
| | - Yingying Li
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Alexa N Avitto
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | - Jasmin Giles
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104
| | | | | | | | - Sheri Speede
- Sanaga-Yong Chimpanzee Rescue Center, International Development Association-Africa, Portland, OR 97208
| | - Ahidjo Ayouba
- Recherche Translationnelle Appliquée au VIH et aux Maladies Infectieuses, Institut de Recherche pour le Développement, University of Montpellier, INSERM, 34090 Montpellier, France
| | - Martine Peeters
- Recherche Translationnelle Appliquée au VIH et aux Maladies Infectieuses, Institut de Recherche pour le Développement, University of Montpellier, INSERM, 34090 Montpellier, France
| | - Julian C Rayner
- Malaria Programme, Wellcome Trust Sanger Institute, Genome Campus, Hinxton Cambridgeshire CB10 1SA, United Kingdom
| | - Wai-Hong Tham
- Walter and Eliza Hall Institute of Medical Research, Parkville VIC 3052, Australia
- Department of Medical Biology, The University of Melbourne, Parkville VIC 3010, Australia
| | - Paul M Sharp
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
- Centre for Immunity, Infection and Evolution, University of Edinburgh, Edinburgh EH9 3FL, United Kingdom
| | - Beatrice H Hahn
- Department of Medicine, University of Pennsylvania, Philadelphia, PA 19104;
- Department of Microbiology, University of Pennsylvania, Philadelphia, PA 19104
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6
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Gruszczyk J, Huang RK, Chan LJ, Menant S, Hong C, Murphy JM, Mok YF, Griffin MDW, Pearson RD, Wong W, Cowman AF, Yu Z, Tham WH. Cryo-EM structure of an essential Plasmodium vivax invasion complex. Nature 2018; 559:135-139. [PMID: 29950717 DOI: 10.1038/s41586-018-0249-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 05/01/2018] [Indexed: 12/21/2022]
Abstract
Plasmodium vivax is the most widely distributed malaria parasite that infects humans1. P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. vivax reticulocyte-binding protein 2b (PvRBP2b) and transferrin receptor 1 (TfR1)2. TfR1-deficient erythroid cells are refractory to invasion by P. vivax, and anti-PvRBP2b monoclonal antibodies inhibit reticulocyte binding and block P. vivax invasion in field isolates2. Here we report a high-resolution cryo-electron microscopy structure of a ternary complex of PvRBP2b bound to human TfR1 and transferrin, at 3.7 Å resolution. Mutational analyses show that PvRBP2b residues involved in complex formation are conserved; this suggests that antigens could be designed that act across P. vivax strains. Functional analyses of TfR1 highlight how P. vivax hijacks TfR1, an essential housekeeping protein, by binding to sites that govern host specificity, without affecting its cellular function of transporting iron. Crystal and solution structures of PvRBP2b in complex with antibody fragments characterize the inhibitory epitopes. Our results establish a structural framework for understanding how P. vivax reticulocyte-binding protein engages its receptor and the molecular mechanism of inhibitory monoclonal antibodies, providing important information for the design of novel vaccine candidates.
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Affiliation(s)
- Jakub Gruszczyk
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Rick K Huang
- CryoEM Shared Resource, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - Li-Jin Chan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Sébastien Menant
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Chuan Hong
- CryoEM Shared Resource, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA
| | - James M Murphy
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Yee-Foong Mok
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Victoria, Australia
| | - Michael D W Griffin
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Victoria, Australia
| | - Richard D Pearson
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom.,Big Data Institute, Li Ka Shing Centre for Health Information and Discovery, Oxford, United Kingdom
| | - Wilson Wong
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Alan F Cowman
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Zhiheng Yu
- CryoEM Shared Resource, Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA.
| | - Wai-Hong Tham
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia. .,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia.
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7
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Gruszczyk J, Kanjee U, Chan LJ, Menant S, Malleret B, Lim NTY, Schmidt CQ, Mok YF, Lin KM, Pearson RD, Rangel G, Smith BJ, Call MJ, Weekes MP, Griffin MDW, Murphy JM, Abraham J, Sriprawat K, Menezes MJ, Ferreira MU, Russell B, Renia L, Duraisingh MT, Tham WH. Transferrin receptor 1 is a reticulocyte-specific receptor for Plasmodium vivax. Science 2018; 359:48-55. [PMID: 29302006 DOI: 10.1126/science.aan1078] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 09/29/2017] [Accepted: 11/16/2017] [Indexed: 12/15/2022]
Abstract
Plasmodium vivax shows a strict host tropism for reticulocytes. We identified transferrin receptor 1 (TfR1) as the receptor for P. vivax reticulocyte-binding protein 2b (PvRBP2b). We determined the structure of the N-terminal domain of PvRBP2b involved in red blood cell binding, elucidating the molecular basis for TfR1 recognition. We validated TfR1 as the biological target of PvRBP2b engagement by means of TfR1 expression knockdown analysis. TfR1 mutant cells deficient in PvRBP2b binding were refractory to invasion of P. vivax but not to invasion of P. falciparum Using Brazilian and Thai clinical isolates, we show that PvRBP2b monoclonal antibodies that inhibit reticulocyte binding also block P. vivax entry into reticulocytes. These data show that TfR1-PvRBP2b invasion pathway is critical for the recognition of reticulocytes during P. vivax invasion.
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Affiliation(s)
- Jakub Gruszczyk
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia
| | - Usheer Kanjee
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA 02115, USA
| | - Li-Jin Chan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Sébastien Menant
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia
| | - Benoit Malleret
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 117597 Singapore.,Singapore Immunology Network, A*STAR, 138648 Singapore
| | - Nicholas T Y Lim
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia
| | - Christoph Q Schmidt
- Institute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, Germany
| | - Yee-Foong Mok
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Kai-Min Lin
- Cambridge Institute for Medical Research, Cambridge CB2 OXY, UK
| | - Richard D Pearson
- Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK.,Big Data Institute, Li Ka Shing Centre for Health Information and Discovery, Oxford, UK
| | - Gabriel Rangel
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA 02115, USA
| | - Brian J Smith
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Melissa J Call
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | | | - Michael D W Griffin
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - James M Murphy
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Jonathan Abraham
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA
| | - Kanlaya Sriprawat
- Shoklo Malaria Research Unit, Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Mae Sot, Thailand
| | - Maria J Menezes
- Department of Parasitology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marcelo U Ferreira
- Department of Parasitology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Bruce Russell
- Department of Microbiology and Immunology, University of Otago, Dunedin 9054, New Zealand
| | - Laurent Renia
- Singapore Immunology Network, A*STAR, 138648 Singapore
| | - Manoj T Duraisingh
- Department of Immunology and Infectious Diseases, Harvard T. H. Chan School of Public Health, Boston, MA 02115, USA
| | - Wai-Hong Tham
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Victoria 3010, Australia
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8
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França CT, White MT, He WQ, Hostetler JB, Brewster J, Frato G, Malhotra I, Gruszczyk J, Huon C, Lin E, Kiniboro B, Yadava A, Siba P, Galinski MR, Healer J, Chitnis C, Cowman AF, Takashima E, Tsuboi T, Tham WH, Fairhurst RM, Rayner JC, King CL, Mueller I. Identification of highly-protective combinations of Plasmodium vivax recombinant proteins for vaccine development. eLife 2017; 6:28673. [PMID: 28949293 PMCID: PMC5655538 DOI: 10.7554/elife.28673] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 09/25/2017] [Indexed: 12/22/2022] Open
Abstract
The study of antigenic targets of naturally-acquired immunity is essential to identify and prioritize antigens for further functional characterization. We measured total IgG antibodies to 38 P. vivax antigens, investigating their relationship with prospective risk of malaria in a cohort of 1–3 years old Papua New Guinean children. Using simulated annealing algorithms, the potential protective efficacy of antibodies to multiple antigen-combinations, and the antibody thresholds associated with protection were investigated for the first time. High antibody levels to multiple known and newly identified proteins were strongly associated with protection (IRR 0.44–0.74, p<0.001–0.041). Among five-antigen combinations with the strongest protective effect (>90%), EBP, DBPII, RBP1a, CyRPA, and PVX_081550 were most frequently identified; several of them requiring very low antibody levels to show a protective association. These data identify individual antigens that should be prioritized for further functional testing and establish a clear path to testing a multicomponent P. vivax vaccine.
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Affiliation(s)
- Camila Tenorio França
- Division of Population Health and Immunity, Walter and Eliza Hall Institute, Parkville, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - Michael T White
- Division of Population Health and Immunity, Walter and Eliza Hall Institute, Parkville, Australia.,MRC Center for Outbreak Analysis and Modelling, Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Wen-Qiang He
- Department of Medical Biology, University of Melbourne, Parkville, Australia.,Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Jessica B Hostetler
- Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, United Kingdom.,Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, United States
| | - Jessica Brewster
- Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Gabriel Frato
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, United States
| | - Indu Malhotra
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, United States
| | - Jakub Gruszczyk
- Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Christele Huon
- Malaria Parasite Biology and Vaccines Unit, Institut Pasteur, Paris, France
| | - Enmoore Lin
- Malaria Immuno-Epidemiology Unit, PNG Institute of Medical Research, Yagaum, Papua New Guinea
| | - Benson Kiniboro
- Malaria Immuno-Epidemiology Unit, PNG Institute of Medical Research, Yagaum, Papua New Guinea
| | - Anjali Yadava
- Malaria Vaccine Branch, Walter Reed Army Institute of Research, Silver Spring, United States
| | - Peter Siba
- Malaria Immuno-Epidemiology Unit, PNG Institute of Medical Research, Yagaum, Papua New Guinea
| | - Mary R Galinski
- International Center for Malaria Research, Education, and Development, Emory Vaccine Center, Yerkes National Primate Research Center, Emory University, Atlanta, United States.,Infectious Diseases Division, Department of Medicine, Emory University, Atlanta, United States
| | - Julie Healer
- Department of Medical Biology, University of Melbourne, Parkville, Australia.,Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Chetan Chitnis
- Malaria Parasite Biology and Vaccines Unit, Institut Pasteur, Paris, France.,International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Alan F Cowman
- Department of Medical Biology, University of Melbourne, Parkville, Australia.,Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Eizo Takashima
- Malaria Vaccine Branch, Walter Reed Army Institute of Research, Silver Spring, United States
| | - Takafumi Tsuboi
- Division of Malaria Research, Proteo-Science Center, Ehime University, Matsuyama, Japan
| | - Wai-Hong Tham
- Department of Medical Biology, University of Melbourne, Parkville, Australia.,Division of Infection and Immunity, Walter and Eliza Hall Institute, Parkville, Australia
| | - Rick M Fairhurst
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, United States
| | - Julian C Rayner
- Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Christopher L King
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, United States
| | - Ivo Mueller
- Division of Population Health and Immunity, Walter and Eliza Hall Institute, Parkville, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Australia.,Malaria Parasites and Hosts Unit, Department of Parasites and Insect Vectors, Institut Pasteur, Paris, France.,Barcelona Institute of Global Health, Barcelona, Spain
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9
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Longley RJ, França CT, White MT, Kumpitak C, Sa-Angchai P, Gruszczyk J, Hostetler JB, Yadava A, King CL, Fairhurst RM, Rayner JC, Tham WH, Nguitragool W, Sattabongkot J, Mueller I. Asymptomatic Plasmodium vivax infections induce robust IgG responses to multiple blood-stage proteins in a low-transmission region of western Thailand. Malar J 2017; 16:178. [PMID: 28454546 PMCID: PMC5410030 DOI: 10.1186/s12936-017-1826-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Accepted: 04/19/2017] [Indexed: 11/11/2022] Open
Abstract
Background Thailand is aiming to eliminate malaria by the year 2024. Plasmodium vivax has now become the dominant species causing malaria within the country, and a high proportion of infections are asymptomatic. A better understanding of antibody dynamics to P. vivax antigens in a low-transmission setting, where acquired immune responses are poorly characterized, will be pivotal for developing new strategies for elimination, such as improved surveillance methods and vaccines. The objective of this study was to characterize total IgG antibody levels to 11 key P. vivax proteins in a village of western Thailand. Methods Plasma samples from 546 volunteers enrolled in a cross-sectional survey conducted in 2012 in Kanchanaburi Province were utilized. Total IgG levels to 11 different proteins known or predicted to be involved in reticulocyte binding or invasion (ARP, GAMA, P41, P12, PVX_081550, and five members of the PvRBP family), as well as the leading pre-erythrocytic vaccine candidate (CSP) were measured using a multiplexed bead-based assay. Associations between IgG levels and infection status, age, and spatial location were explored. Results Individuals from a low-transmission region of western Thailand reacted to all 11 P. vivax recombinant proteins. Significantly greater IgG levels were observed in the presence of a current P. vivax infection, despite all infected individuals being asymptomatic. IgG levels were also higher in adults (18 years and older) than in children. For most of the proteins, higher IgG levels were observed in individuals living closer to the Myanmar border and further away from local health services. Conclusions Robust IgG responses were observed to most proteins and IgG levels correlated with surrogates of exposure, suggesting these antigens may serve as potential biomarkers of exposure, immunity, or both. Electronic supplementary material The online version of this article (doi:10.1186/s12936-017-1826-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rhea J Longley
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Camila T França
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Michael T White
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Imperial College, London, UK
| | - Chalermpon Kumpitak
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Patiwat Sa-Angchai
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jakub Gruszczyk
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia
| | - Jessica B Hostetler
- Malaria Programme, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.,Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Anjali Yadava
- Malaria Vaccine Branch, United States Military Malaria Research Program, Walter Reed Army Institute of Research, Silver Spring, MD, USA
| | - Christopher L King
- Center for Global Health and Diseases, Case Western Reserve University, Cleveland, OH, USA
| | - Rick M Fairhurst
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Julian C Rayner
- Malaria Programme, Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | - Wai-Hong Tham
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, Australia
| | - Wang Nguitragool
- Department of Molecular Tropical Medicine and Genetics, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Jetsumon Sattabongkot
- Mahidol Vivax Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Ivo Mueller
- Walter and Eliza Hall Institute of Medical Research, Melbourne, Australia. .,Department of Medical Biology, University of Melbourne, Melbourne, Australia. .,ISGlobal, Barcelona Institute for Global Health, Hospital Clínic-Universitat de Barcelona, 08036, Barcelona, Spain. .,Institut Pasteur, Paris, France.
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10
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Gruszczyk J, Fleurie A, Olivares-Illana V, Béchet E, Zanella-Cleon I, Moréra S, Meyer P, Pompidor G, Kahn R, Grangeasse C, Nessler S. Structure analysis of the Staphylococcus aureus UDP-N-acetyl-mannosamine dehydrogenase Cap5O involved in capsular polysaccharide biosynthesis. J Biol Chem 2011; 286:17112-21. [PMID: 21454499 PMCID: PMC3089555 DOI: 10.1074/jbc.m110.216002] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/06/2011] [Indexed: 01/05/2023] Open
Abstract
Bacterial UDP-sugar dehydrogenases are part of the biosynthesis pathway of extracellular polysaccharides. These compounds act as important virulence factors by protecting the cell from opsonophagocytosis and complement-mediated killing. In Staphylococcus aureus, the protein Cap5O catalyzes the oxidation of UDP-N-acetyl-mannosamine to UDP-N-acetyl-mannosaminuronic acid. Cap5O is crucial for the production of serotype 5 capsular polysaccharide that prevents the interaction of bacteria with both phagocytic and nonphagocytic eukaryotic cells. However, details of its catalytic mechanism remain unknown. We thus crystallized Cap5O and solved the first structure of an UDP-N-acetyl-mannosamine dehydrogenase. This study revealed that the catalytic cysteine makes a disulfide bond that has never been observed in other structurally characterized members of the NDP-sugar dehydrogenase family. Biochemical and mutagenesis experiments demonstrated that the formation of this disulfide bridge regulates the activity of Cap5O. We also identified two arginine residues essential for Cap5O activity. Previous data suggested that Cap5O is activated by tyrosine phosphorylation, so we characterized the phosphorylation site and examined the underlying regulatory mechanism.
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Affiliation(s)
- Jakub Gruszczyk
- From the Laboratoire d'Enzymologie et Biochimie Structurales, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France
| | - Aurore Fleurie
- the Institut de Biologie et Chimie des Protéines, UMR 5086 (CNRS, Université Lyon 1), 7 Passage du Vercors, 69367 Lyon, France, and
| | - Vanesa Olivares-Illana
- From the Laboratoire d'Enzymologie et Biochimie Structurales, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France
| | - Emmanuelle Béchet
- the Institut de Biologie et Chimie des Protéines, UMR 5086 (CNRS, Université Lyon 1), 7 Passage du Vercors, 69367 Lyon, France, and
| | - Isabelle Zanella-Cleon
- the Institut de Biologie et Chimie des Protéines, UMR 5086 (CNRS, Université Lyon 1), 7 Passage du Vercors, 69367 Lyon, France, and
| | - Solange Moréra
- From the Laboratoire d'Enzymologie et Biochimie Structurales, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France
| | - Philippe Meyer
- From the Laboratoire d'Enzymologie et Biochimie Structurales, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France
| | - Guillaume Pompidor
- the Institut de Biologie Structurale J.-P. Ebel, UMR 5075 (CNRS, CEA, UJF), 41 Rue Jules Horowitz, 38027 Grenoble, France
| | - Richard Kahn
- the Institut de Biologie Structurale J.-P. Ebel, UMR 5075 (CNRS, CEA, UJF), 41 Rue Jules Horowitz, 38027 Grenoble, France
| | - Christophe Grangeasse
- the Institut de Biologie et Chimie des Protéines, UMR 5086 (CNRS, Université Lyon 1), 7 Passage du Vercors, 69367 Lyon, France, and
| | - Sylvie Nessler
- From the Laboratoire d'Enzymologie et Biochimie Structurales, Centre de Recherche de Gif, CNRS, 91198 Gif sur Yvette, France
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11
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Bechet E, Gruszczyk J, Terreux R, Gueguen-Chaignon V, Vigouroux A, Obadia B, Cozzone AJ, Nessler S, Grangeasse C. Identification of structural and molecular determinants of the tyrosine-kinase Wzc and implications in capsular polysaccharide export. Mol Microbiol 2011; 77:1315-25. [PMID: 20633230 DOI: 10.1111/j.1365-2958.2010.07291.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Capsular polysaccharides are well-established virulence factors of pathogenic bacteria. Their biosynthesis and export are regulated within the transmembrane polysaccharide assembly machinery by the autophosphorylation of atypical tyrosine-kinases, named BY-kinases. However, the accurate functioning of these tyrosine-kinases remains unknown. Here, we report the crystal structure of the non-phosphorylated cytoplasmic domain of the tyrosine-kinase Wzc from Escherichia coli in complex with ADP showing that it forms a ring-shaped octamer. Mutational analysis demonstrates that a conserved EX(2) RX(2) R motif involved in subunit interactions is essential for polysaccharide export. We also elucidate the role of a putative internal regulatory tyrosine and we show that BY-kinases from proteobacteria autophosphorylate on their C-terminal tyrosine cluster via a single-step intermolecular mechanism. This structure-function analysis also allows us to demonstrate that two different parts of a conserved basic region called the RK-cluster are essential for polysaccharide export and for kinase activity respectively. Based on these data, we revisit the dichotomy made between BY-kinases from proteobacteria and firmicutes and we propose a unique process of oligomerization and phosphorylation. We also reassess the function of BY-kinases in the capsular polysaccharide assembly machinery.
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Affiliation(s)
- Emmanuelle Bechet
- Institut de Biologie et Chimie des Protéines, CNRS, Université Lyon 1, Université de Lyon, 69367 Lyon, France
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12
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Cierpicki T, Bielnicki J, Zheng M, Gruszczyk J, Kasterka M, Petoukhov M, Zhang A, Fernandez EJ, Svergun DI, Derewenda U, Bushweller JH, Derewenda ZS. The solution structure and dynamics of the DH-PH module of PDZRhoGEF in isolation and in complex with nucleotide-free RhoA. Protein Sci 2009; 18:2067-79. [PMID: 19670212 PMCID: PMC2786971 DOI: 10.1002/pro.219] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 07/24/2009] [Accepted: 07/27/2009] [Indexed: 12/14/2022]
Abstract
The DH-PH domain tandems of Dbl-homology guanine nucleotide exchange factors catalyze the exchange of GTP for GDP in Rho-family GTPases, and thus initiate a wide variety of cellular signaling cascades. Although several crystal structures of complexes of DH-PH tandems with cognate, nucleotide free Rho GTPases are known, they provide limited information about the dynamics of the complex and it is not clear how accurately they represent the structures in solution. We used a complementary combination of nuclear magnetic resonance (NMR), small-angle X-ray scattering (SAXS), and hydrogen-deuterium exchange mass spectrometry (DXMS) to study the solution structure and dynamics of the DH-PH tandem of RhoA-specific exchange factor PDZRhoGEF, both in isolation and in complex with nucleotide free RhoA. We show that in solution the DH-PH tandem behaves as a rigid entity and that the mutual disposition of the DH and PH domains remains identical within experimental error to that seen in the crystal structure of the complex, thus validating the latter as an accurate model of the complex in vivo. We also show that the nucleotide-free RhoA exhibits elevated dynamics when in complex with DH-PH, a phenomenon not observed in the crystal structure, presumably due to the restraining effects of crystal contacts. The complex is readily and rapidly dissociated in the presence of both GDP and GTP nucleotides, with no evidence of intermediate ternary complexes.
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Affiliation(s)
- Tomasz Cierpicki
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Jakub Bielnicki
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Meiying Zheng
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Jakub Gruszczyk
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Marta Kasterka
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Maxim Petoukhov
- European Molecular Biology Laboratory, Hamburg OutstationD-22603 Hamburg, Germany
| | - Aming Zhang
- Department of Chemical Engineering, University of VirginiaCharlottesville, Virginia 22908
| | - Erik J Fernandez
- Department of Chemical Engineering, University of VirginiaCharlottesville, Virginia 22908
| | - Dmitri I Svergun
- European Molecular Biology Laboratory, Hamburg OutstationD-22603 Hamburg, Germany
| | - Urszula Derewenda
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - John H Bushweller
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
| | - Zygmunt S Derewenda
- Department of Molecular Physiology and Biological Physics, University of VirginiaCharlottesville, Virginia 22908
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13
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Maciejewski D, Smolarek Z, Maciejewska I, Gruszczyk J, Woźnica R. [Results of treatment of severe craniocerebral injuries in an interdisciplinary intensive therapy unit]. Wiad Lek 1989; 42:805-10. [PMID: 2633491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Early results of treatment of severe craniocerebral injury were analysed in the Department of Anaesthesiology and Intensive Therapy, Province Hospital in Bielsko Biała. The preliminary scoring below 15 points of Glasgow scale was obtained. During five years of observation 63 out of 78 patients (80.7%) died. Full recovery was obtained in two cases (2.56%). The results of treatment were analysed in relation to clinical diagnosis, associated injuries, age of patients and treatment results. Pulmonary complications were significantly more frequent: adult respiratory distress syndrome and acute posttraumatic pulmonary oedema (over 60% of cases). The treatment methods and their modifications are surveyed.
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