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Lux J, Sánchez García L, Chaparro Fernández P, Laloli L, Licheri MF, Gallay C, Hermans PWM, Croucher NJ, Veening JW, Dijkman R, Straume D, Hathaway LJ. AmiA and AliA peptide ligands, found in Klebsiella pneumoniae, are imported into pneumococci and alter the transcriptome. Sci Rep 2024; 14:12416. [PMID: 38816440 PMCID: PMC11139975 DOI: 10.1038/s41598-024-63217-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 05/27/2024] [Indexed: 06/01/2024] Open
Abstract
Klebsiella pneumoniae releases the peptides AKTIKITQTR and FNEMQPIVDRQ, which bind the pneumococcal proteins AmiA and AliA respectively, two substrate-binding proteins of the ABC transporter Ami-AliA/AliB oligopeptide permease. Exposure to these peptides alters pneumococcal phenotypes such as growth. Using a mutant in which a permease domain of the transporter was disrupted, by growth analysis and epifluorescence microscopy, we confirmed peptide uptake via the Ami permease and intracellular location in the pneumococcus. By RNA-sequencing we found that the peptides modulated expression of genes involved in metabolism, as pathways affected were mostly associated with energy or synthesis and transport of amino acids. Both peptides downregulated expression of genes involved in branched-chain amino acid metabolism and the Ami permease; and upregulated fatty acid biosynthesis genes but differed in their regulation of genes involved in purine and pyrimidine biosynthesis. The transcriptomic changes are consistent with growth suppression by peptide treatment. The peptides inhibited growth of pneumococcal isolates of serotypes 3, 8, 9N, 12F and 19A, currently prevalent in Switzerland, and caused no detectable toxic effect to primary human airway epithelial cells. We conclude that pneumococci take up K. pneumoniae peptides from the environment via binding and transport through the Ami permease. This changes gene expression resulting in altered phenotypes, particularly reduced growth.
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Affiliation(s)
- Janine Lux
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Lucía Sánchez García
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
| | - Patricia Chaparro Fernández
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
| | - Laura Laloli
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
| | - Manon F Licheri
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
| | - Clement Gallay
- Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Peter W M Hermans
- Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht (UMCU), Utrecht, The Netherlands
| | - Nicholas J Croucher
- MRC Centre for Global Infectious Disease Analysis, White City Campus, Imperial College London, Sir Michael Uren Hub, London, UK
| | - Jan-Willem Veening
- Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Ronald Dijkman
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland
- Multidisciplinary Center for Infectious Diseases, University of Bern, Bern, Switzerland
- Microscopy Imaging Centre (MIC), Theodor Kocher Institute, University of Bern, Bern, Switzerland
- European Virus Bioinformatics Center, Jena, Germany
| | - Daniel Straume
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, 1430, Ås, Norway
| | - Lucy J Hathaway
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 25, CH-3001, Bern, Switzerland.
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2
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Lux J, Portmann H, Sánchez García L, Erhardt M, Holivololona L, Laloli L, Licheri MF, Gallay C, Hoepner R, Croucher NJ, Straume D, Veening JW, Dijkman R, Heller M, Grandgirard D, Leib SL, Hathaway LJ. Klebsiella pneumoniae peptide hijacks a Streptococcus pneumoniae permease to subvert pneumococcal growth and colonization. Commun Biol 2024; 7:425. [PMID: 38589539 PMCID: PMC11001997 DOI: 10.1038/s42003-024-06113-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 03/26/2024] [Indexed: 04/10/2024] Open
Abstract
Treatment of pneumococcal infections is limited by antibiotic resistance and exacerbation of disease by bacterial lysis releasing pneumolysin toxin and other inflammatory factors. We identified a previously uncharacterized peptide in the Klebsiella pneumoniae secretome, which enters Streptococcus pneumoniae via its AmiA-AliA/AliB permease. Subsequent downregulation of genes for amino acid biosynthesis and peptide uptake was associated with reduction of pneumococcal growth in defined medium and human cerebrospinal fluid, irregular cell shape, decreased chain length and decreased genetic transformation. The bacteriostatic effect was specific to S. pneumoniae and Streptococcus pseudopneumoniae with no effect on Streptococcus mitis, Haemophilus influenzae, Staphylococcus aureus or K. pneumoniae. Peptide sequence and length were crucial to growth suppression. The peptide reduced pneumococcal adherence to primary human airway epithelial cell cultures and colonization of rat nasopharynx, without toxicity. We identified a peptide with potential as a therapeutic for pneumococcal diseases suppressing growth of multiple clinical isolates, including antibiotic resistant strains, while avoiding bacterial lysis and dysbiosis.
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Affiliation(s)
- Janine Lux
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Hannah Portmann
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Lucía Sánchez García
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Maria Erhardt
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Lalaina Holivololona
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Laura Laloli
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Manon F Licheri
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Clement Gallay
- Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Robert Hoepner
- Department of Neurology, Bern University Hospital and University of Bern, Bern, Switzerland
| | - Nicholas J Croucher
- MRC Centre for Global Infectious Disease Analysis, Sir Michael Uren Hub, White City Campus, Imperial College London, London, UK
| | - Daniel Straume
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, 1430, Ås, Norway
| | - Jan-Willem Veening
- Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Ronald Dijkman
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Manfred Heller
- Proteomics and Mass Spectrometry Core Facility, Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Denis Grandgirard
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Stephen L Leib
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland
| | - Lucy J Hathaway
- Faculty of Medicine, Institute for Infectious Diseases, University of Bern, Bern, Switzerland.
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3
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Kanojiya P, Saroj SD. Effect of respiratory tract co-colonizers on initial attachment of Neisseria meningitidis. Arch Microbiol 2023; 205:273. [PMID: 37400657 DOI: 10.1007/s00203-023-03612-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023]
Abstract
Respiratory tract is a complex system comprising of unique microbiota inhabitants. Neisseria meningitidis, Staphylococcus aureus, Streptococcus pyogenes, Pseudomonas aeruginosa and Klebsiella pneumoniae are few prevalent bacteria in the community composition during lung infections. Although, N. meningitidis resides asymptomatically in nasopharynx of the human host, it can cause fatal infections like meningitis. However, factors affecting transit from carriage to symptomatic infection are not well understood. Various host metabolites and environmental conditions affect the virulence of bacteria. Here, we report that presence of co-colonizers significantly reduces the initial attachment of N. meningitidis to A549 nasopharyngeal epithelial cells. Further, significant decrease in invasion to A549 nasopharyngeal epithelial cells was observed. Moreover, survival in J774A.1 murine macrophage also increases significantly when conditioned media (CM) from S. pyogenes and L. rhamnosus is used for culturing N. meningitidis. The increase in survival could be attributed to increased capsule synthesis. The gene expression studies revealed increased expression of siaC and ctrB in CM prepared from the growth S. pyogenes and L. rhamnosus. Overall, the results suggest change in the virulence of N. meningitidis is assisted by lung microbiota.
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Affiliation(s)
- Poonam Kanojiya
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Lavale, Pune, Maharashtra, 412115, India
| | - Sunil D Saroj
- Symbiosis School of Biological Sciences, Symbiosis International (Deemed University), Lavale, Pune, Maharashtra, 412115, India.
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4
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Wei Y, Sturges CI, Palmer KL. Human Serum Supplementation Promotes Streptococcus mitis Growth and Induces Specific Transcriptomic Responses. Microbiol Spectr 2023; 11:e0512922. [PMID: 37014220 PMCID: PMC10269507 DOI: 10.1128/spectrum.05129-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 03/01/2023] [Indexed: 04/05/2023] Open
Abstract
Streptococcus mitis is a normal member of the human oral microbiota and a leading opportunistic pathogen causing infective endocarditis (IE). Despite the complex interactions between S. mitis and the human host, understanding of S. mitis physiology and its mechanisms of adaptation to host-associated environments is inadequate, especially compared with other IE bacterial pathogens. This study reports the growth-promoting effects of human serum on S. mitis and other pathogenic streptococci, including S. oralis, S. pneumoniae, and S. agalactiae. Using transcriptomic analyses, we identified that, with the addition of human serum, S. mitis downregulates uptake systems for metal ions and sugars, fatty acid biosynthetic genes, and genes involved in stress response and other processes related with growth and replication. S. mitis upregulates uptake systems for amino acids and short peptides in response to human serum. Zinc availability and environmental signals sensed by the induced short peptide binding proteins were not sufficient to confer the growth-promoting effects. More investigation is required to establish the mechanism for growth promotion. Overall, our study contributes to the fundamental understanding of S. mitis physiology under host-associated conditions. IMPORTANCE S. mitis is exposed to human serum components during commensalism in the human mouth and bloodstream pathogenesis. However, the physiological effects of serum components on this bacterium remain unclear. Using transcriptomic analyses, S. mitis biological processes that respond to the presence of human serum were revealed, improving the fundamental understanding of S. mitis physiology in human host conditions.
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Affiliation(s)
- Yahan Wei
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, Texas, USA
| | - Camille I. Sturges
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, Texas, USA
| | - Kelli L. Palmer
- Department of Biological Sciences, The University of Texas at Dallas, Richardson, Texas, USA
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5
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AmiA and AliA peptide ligands are secreted by Klebsiella pneumoniae and inhibit growth of Streptococcus pneumoniae. Sci Rep 2022; 12:22268. [PMID: 36564446 PMCID: PMC9789142 DOI: 10.1038/s41598-022-26838-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022] Open
Abstract
Streptococcus pneumoniae colonizes the human nasopharynx, a multi-species microbial niche. Pneumococcal Ami-AliA/AliB oligopeptide permease is an ABC transporter involved in environmental sensing with peptides AKTIKITQTR, FNEMQPIVDRQ, and AIQSEKARKHN identified as ligands of its substrate binding proteins AmiA, AliA, and AliB, respectively. These sequences match ribosomal proteins of multiple bacterial species, including Klebsiella pneumoniae. By mass spectrometry, we identified such peptides in the Klebsiella pneumoniae secretome. AmiA and AliA peptide ligands suppressed pneumococcal growth, but the effect was dependent on peptide length. Growth was suppressed for diverse pneumococci, including antibiotic-resistant strains, but not other bacterial species tested, with the exception of Streptococcus pseudopneumoniae, whose growth was suppressed by the AmiA peptide ligand. By multiple sequence alignments and protein and peptide binding site predictions, for AmiA we have identified the location of an amino acid in the putative binding site whose mutation appears to result in loss of response to the peptide. Our results indicate that pneumococci sense the presence of Klebsiella pneumoniae peptides in the environment.
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6
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Cao L, Li N, Dong Y, Yang XY, Liu J, He QY, Ge R, Sun X. SPD_0090 Negatively Contributes to Virulence of Streptococcus pneumoniae. Front Microbiol 2022; 13:896896. [PMID: 35770170 PMCID: PMC9234739 DOI: 10.3389/fmicb.2022.896896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 05/13/2022] [Indexed: 11/30/2022] Open
Abstract
In most bacteria, iron plays an important role in the survival of bacteria and the process of infection to the host. Streptococcus pneumoniae (S. pneumoniae) evolved three iron transporters (i.e., PiaABC, PiuABC, and PitABC) responsible for the transportation of three kinds of iron (i.e., ferrichrome, hemin, and ferric ion). Our previous study showed that both mRNA and protein levels of SPD_0090 were significantly upregulated in the ΔpiuA/ΔpiaA/ΔpitA triple mutant, but its detailed biological function is unknown. In this study, we constructed spd_0090 knockout and complement strain and found that the deletion of spd_0090 hinders bacterial growth. SPD_0090 is located on the cell membrane and affects the hemin utilization ability of S. pneumoniae. The cell infection model showed that the knockout strain had stronger invasion and adhesion ability. Notably, knockout of the spd_0090 gene resulted in an enhanced infection ability of S. pneumoniae in mice by increasing the expression of virulence factors. Furthermore, iTRAQ quantitative proteomics studies showed that the knockout of spd_0090 inhibited carbon metabolism and thus suppressed bacterial growth. Our study showed that SPD_0090 negatively regulates the virulence of S. pneumoniae.
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Affiliation(s)
- Linlin Cao
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Nan Li
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Yingshan Dong
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Xiao-Yan Yang
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Jiajia Liu
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
| | - Qing-Yu He
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
- *Correspondence: Qing-Yu He,
| | - Ruiguang Ge
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Ruiguang Ge,
| | - Xuesong Sun
- MOE Key Laboratory of Tumor Molecular Biology and Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou, China
- Xuesong Sun,
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7
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Leshchiner D, Rosconi F, Sundaresh B, Rudmann E, Ramirez LMN, Nishimoto AT, Wood SJ, Jana B, Buján N, Li K, Gao J, Frank M, Reeve SM, Lee RE, Rock CO, Rosch JW, van Opijnen T. A genome-wide atlas of antibiotic susceptibility targets and pathways to tolerance. Nat Commun 2022; 13:3165. [PMID: 35672367 PMCID: PMC9174251 DOI: 10.1038/s41467-022-30967-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 05/26/2022] [Indexed: 11/10/2022] Open
Abstract
Detailed knowledge on how bacteria evade antibiotics and eventually develop resistance could open avenues for novel therapeutics and diagnostics. It is thereby key to develop a comprehensive genome-wide understanding of how bacteria process antibiotic stress, and how modulation of the involved processes affects their ability to overcome said stress. Here we undertake a comprehensive genetic analysis of how the human pathogen Streptococcus pneumoniae responds to 20 antibiotics. We build a genome-wide atlas of drug susceptibility determinants and generated a genetic interaction network that connects cellular processes and genes of unknown function, which we show can be used as therapeutic targets. Pathway analysis reveals a genome-wide atlas of cellular processes that can make a bacterium less susceptible, and often tolerant, in an antibiotic specific manner. Importantly, modulation of these processes confers fitness benefits during active infections under antibiotic selection. Moreover, screening of sequenced clinical isolates demonstrates that mutations in genes that decrease antibiotic sensitivity and increase tolerance readily evolve and are frequently associated with resistant strains, indicating such mutations could be harbingers for the emergence of antibiotic resistance.
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Affiliation(s)
| | - Federico Rosconi
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA
| | | | - Emily Rudmann
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA
| | | | - Andrew T Nishimoto
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Stephen J Wood
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA
| | - Bimal Jana
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA
| | - Noemí Buján
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA
| | - Kaicheng Li
- Chemistry Department, Boston College, Chestnut Hill, MA, 02467, USA
| | - Jianmin Gao
- Chemistry Department, Boston College, Chestnut Hill, MA, 02467, USA
| | - Matthew Frank
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Stephanie M Reeve
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Richard E Lee
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Charles O Rock
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jason W Rosch
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Tim van Opijnen
- Biology Department, Boston College, Chestnut Hill, MA, 02467, USA.
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8
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van Beek LF, Surmann K, van den Berg van Saparoea HB, Houben D, Jong WSP, Hentschker C, Ederveen THA, Mitsi E, Ferreira DM, van Opzeeland F, van der Gaast-de Jongh CE, Joosten I, Völker U, Schmidt F, Luirink J, Diavatopoulos DA, de Jonge MI. Exploring metal availability in the natural niche of Streptococcus pneumoniae to discover potential vaccine antigens. Virulence 2021; 11:1310-1328. [PMID: 33017224 PMCID: PMC7550026 DOI: 10.1080/21505594.2020.1825908] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Nasopharyngeal colonization by Streptococcus pneumoniae is a prerequisite for pneumococcal transmission and disease. Current vaccines protect only against disease and colonization caused by a limited number of serotypes, consequently allowing serotype replacement and transmission. Therefore, the development of a broadly protective vaccine against colonization, transmission and disease is desired but requires a better understanding of pneumococcal adaptation to its natural niche. Hence, we measured the levels of free and protein-bound transition metals in human nasal fluid, to determine the effect of metal concentrations on the growth and proteome of S. pneumoniae. Pneumococci cultured in medium containing metal levels comparable to nasal fluid showed a highly distinct proteomic profile compared to standard culture conditions, including the increased abundance of nine conserved, putative surface-exposed proteins. AliA, an oligopeptide binding protein, was identified as the strongest protective antigen, demonstrated by the significantly reduced bacterial load in a murine colonization and a lethal mouse pneumonia model, highlighting its potential as vaccine antigen.
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Affiliation(s)
- Lucille F van Beek
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases , Nijmegen, The Netherlands
| | - Kristin Surmann
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald , Greifswald, Germany
| | | | | | | | - Christian Hentschker
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald , Greifswald, Germany
| | - Thomas H A Ederveen
- Center for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center , Nijmegen, The Netherlands
| | - Elena Mitsi
- Liverpool School of Tropical medicine, Respiratory Infection Group , Liverpool, United Kingdom of Great Britain and Northern Ireland
| | - Daniela M Ferreira
- Liverpool School of Tropical medicine, Respiratory Infection Group , Liverpool, United Kingdom of Great Britain and Northern Ireland
| | - Fred van Opzeeland
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases , Nijmegen, The Netherlands
| | - Christa E van der Gaast-de Jongh
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases , Nijmegen, The Netherlands
| | - Irma Joosten
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands
| | - Uwe Völker
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald , Greifswald, Germany
| | - Frank Schmidt
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald , Greifswald, Germany.,Proteomics Core, Weill Cornell Medicine-Qatar , Doha, Qatar
| | - Joen Luirink
- Abera Bioscience AB , Solna, Sweden.,Department of Molecular Microbiology, Faculty of Science, Amsterdam Institute of Molecular and Life Sciences, Vrije Universiteit Amsterdam , Amsterdam, The Netherlands
| | - Dimitri A Diavatopoulos
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases , Nijmegen, The Netherlands
| | - Marien I de Jonge
- Section Pediatric Infectious Diseases, Laboratory of Medical Immunology, Radboud Institute for Molecular Life Sciences , Nijmegen, The Netherlands.,Radboud Center for Infectious Diseases , Nijmegen, The Netherlands
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9
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Nasher F, Kwun MJ, Croucher NJ, Heller M, Hathaway LJ. Peptide Occurring in Enterobacteriaceae Triggers Streptococcus pneumoniae Cell Death. Front Cell Infect Microbiol 2019; 9:320. [PMID: 31552200 PMCID: PMC6748166 DOI: 10.3389/fcimb.2019.00320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 08/26/2019] [Indexed: 11/15/2022] Open
Abstract
Non-encapsulated Streptococcus pneumoniae often possess two genes, aliB-like ORF 1 and aliB-like ORF 2, in place of capsule genes. AliB-like ORF 1 is thought to encode a substrate binding protein of an ABC transporter which binds peptide SETTFGRDFN, found in 50S ribosomal subunit protein L4 of Enterobacteriaceae. Here, we investigated the effect of binding of AliB-like ORF 1 peptide on the transcriptome and proteome of non-encapsulated pneumococci. We found upregulation of gene expression of a metacaspase and a gene encoding N-acetylmuramoyl-L-alanine amidase, both of which are proposed to be involved in programmed cell death in prokaryotic cells. Proteome profiling indicated upregulation of transcriptional regulators and downregulation of metabolism-associated genes. Exposure to the peptide specifically triggered death in pneumococci which express AliB-like ORF 1, with the bacteria having an apoptotic appearance by electron microscopy. We propose that binding of the AliB-like ORF 1 peptide ligand by the pneumococcus signals a challenging environment with hostile bacterial species leading to death of a proportion of the pneumococcal population.
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Affiliation(s)
- Fauzy Nasher
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | - Min Jung Kwun
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, United Kingdom
| | - Nicholas J Croucher
- Department of Infectious Disease Epidemiology, MRC Centre for Global Infectious Disease Analysis, Imperial College London, London, United Kingdom
| | - Manfred Heller
- Proteomics and Mass Spectrometry Core Facility, Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Lucy J Hathaway
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Bern, Switzerland
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10
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Hathaway LJ. New Virulence Factors Identified in Pneumococcal Meningitis. Trends Microbiol 2019; 27:895-896. [PMID: 31506191 DOI: 10.1016/j.tim.2019.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 08/26/2019] [Indexed: 11/15/2022]
Abstract
Streptococcus pneumoniae causes bacterial meningitis with a high fatality rate globally. Patients who survive have a significant risk of lasting disabilities. Schmidt et al. have identified bacterial proteins that play a crucial role in pneumococcal meningitis: AliB, part of an oligopeptide transporter, and ComDE of the competence regulator.
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Affiliation(s)
- Lucy J Hathaway
- Institute for Infectious Diseases, Faculty of Medicine, University of Bern, Friedbühlstrasse 51, CH-3001 Bern, Switzerland.
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