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Dobrut A, Skibiński J, Bekier A, Drożdż K, Rudnicka K, Płociński P, Siemińska I, Brzychczy-Włoch M. Development of a prototypic, field-usable diagnostic tool for the detection of gram-positive cocci-induced mastitis in cattle. BMC Vet Res 2024; 20:169. [PMID: 38698383 PMCID: PMC11064325 DOI: 10.1186/s12917-024-04028-5] [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: 11/24/2023] [Accepted: 04/22/2024] [Indexed: 05/05/2024] Open
Abstract
BACKGROUND Bovine mastitis is one of the most widespread diseases affecting cattle, leading to significant losses for the dairy industry. Currently, the so-called gold standard in mastitis diagnosis involves determining the somatic cell count (SCC). Apart from a number of advantages, this method has one serious flaw: It does not identify the etiological factor causing a particular infection, making it impossible to introduce targeted antimicrobial therapy. This can contribute to multidrug-resistance in bacterial species. The diagnostic market lacks a test that has the advantages of SCC and also recognizes the species of pathogen causing the inflammation. Therefore, the aim of our study was to develop a lateral flow immunoassay (LFIA) based on elongation factor Tu for identifying most prevalent Gram-positive cocci responsible for causing mastitis including Streptococcus uberis, Streptococcus agalactiae and Staphylococcus aureus. RESULTS As a result, we showed that the assay for S. uberis detection demonstrated a specificity of 89.02%, a sensitivity of 43.59%, and an accuracy of 80.3%. In turn, the second variant - assay for Gram-positive cocci reached a specificity of 95.59%, a sensitivity of 43.28%, and an accuracy of 78.33%. CONCLUSIONS Our study shows that EF-Tu is a promising target for LFIA and we have delivered evidence that further evaluation could improve test parameters and fill the gap in the mastitis diagnostics market.
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Affiliation(s)
- Anna Dobrut
- Department of Molecular Medical Microbiology, Chair of Microbiology, Jagiellonian University Medical College, Krakow, Poland.
| | - Jakub Skibiński
- BioMedChem Doctoral School of University of Lodz and Lodz Institutes of The Polish Academy of Sciences, University of Lodz, Lodz, Poland
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Adrian Bekier
- Department of Immunology and Allergy, Chair of Pulmonology, Rheumatology and Clinical Immunology, Medical University of Lodz, Lodz, Poland
| | - Kamil Drożdż
- Department of Molecular Medical Microbiology, Chair of Microbiology, Jagiellonian University Medical College, Krakow, Poland
| | - Karolina Rudnicka
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland.
| | - Przemysław Płociński
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Izabela Siemińska
- Institute of Veterinary Sciences, University Center of Veterinary Medicine JU-AU, University of Agriculture in Krakow, Krakow, Poland
| | - Monika Brzychczy-Włoch
- Department of Molecular Medical Microbiology, Chair of Microbiology, Jagiellonian University Medical College, Krakow, Poland
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Ibrahim AM, Azam MS, Schneewind O, Missiakas D. Processing of LtaS restricts LTA assembly and YSIRK preprotein trafficking into Staphylococcus aureus cross-walls. mBio 2024; 15:e0285223. [PMID: 38174934 PMCID: PMC10865820 DOI: 10.1128/mbio.02852-23] [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: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 01/05/2024] Open
Abstract
Septal membranes of Staphylococcus aureus serve as the site of secretion for precursors endowed with the YSIRK motif. Depletion of ltaS, a gene required for lipoteichoic acid (LTA) synthesis, results in the loss of restricted trafficking of YSIRK precursors to septal membranes. Here, we seek to understand the mechanism that ties LTA assembly and trafficking of YSIRK precursors. We confirm that catalytically inactive lipoteichoic acid synthase (LtaS)T300A does not support YSIRK precursor trafficking to septa. We hypothesize that the enzyme's reactants [gentiobiosyldiacylglycerol (Glc2-DAG) and phosphatidylglycerol (PG)] or products [LTA and diacylglycerol (DAG)], not LtaS, must drive this process. Indeed, we observe that septal secretion of the staphylococcal protein A YSIRK precursor is lost in ypfP and ltaA mutants that produce glycerophosphate polymers [poly(Gro-P)] without the Glc2-DAG lipid anchor. These mutants display longer poly(Gro-P) chains, implying enhanced PG consumption and DAG production. Our experiments also reveal that in the absence of Glc2-DAG, the processing of LtaS to the extracellular catalytic domain, eLtaS, is impaired. Conversely, LTA polymerization is delayed in a strain producing LtaSS218P, a variant processed more slowly than LtaS. We conclude that Glc2-DAG binding to the enzyme couples catalysis by LtaS and the physical release of eLtaS. We propose a model for the temporal and localized assembly of LTA into cross-walls. When LtaS is not processed in a timely manner, eLtaS no longer diffuses upon daughter cell splitting, LTA assembly continues, and the unique septal-lipid pool, PG over DAG ratio, is not established. This results in profound physiological changes in S. aureus cells, including the inability to restrict the secretion of YSIRK precursors at septal membranes.IMPORTANCEIn Staphylococcus aureus, peptidoglycan is assembled at the septum. Dedicated cell division proteins coordinate septal formation and the fission of daughter cells. Lipoteichoic acid (LTA) assembly and trafficking of preproteins with a YSIRK motif also occur at the septum. This begs the question as to whether cell division components also recruit these two pathways. This study shows that the processing of lipoteichoic acid synthase (LtaS) to extracellular LtaS by signal peptidase is regulated by gentiobiosyldiacylglycerol (Glc2-DAG), the priming substrate for LTA assembly. A model is proposed whereby a key substrate controls the temporal and spatial activity of an enzyme. In turn, this mechanism enables the establishment of a unique and transient lipid pool that defines septal membranes as a targeting site for the secretion of YSIRK preproteins.
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Affiliation(s)
- Amany M. Ibrahim
- Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Lemont, Illinois, USA
- Department of Microbiology and Immunology, Faculty of Pharmacy, Sinai University, Arish, Egypt
| | - Muhammad S. Azam
- Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Lemont, Illinois, USA
| | - Olaf Schneewind
- Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Lemont, Illinois, USA
| | - Dominique Missiakas
- Department of Microbiology, Howard Taylor Ricketts Laboratory, The University of Chicago, Lemont, Illinois, USA
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3
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Drumm SD, Cormican P, Owens RA, Mitchell J, Keane OM. Immunoproteomic analysis of the serum IgG response to cell wall-associated proteins of Staphylococcus aureus strains belonging to CC97 and CC151. Vet Res 2023; 54:79. [PMID: 37723537 PMCID: PMC10506246 DOI: 10.1186/s13567-023-01212-7] [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: 10/03/2022] [Accepted: 07/24/2023] [Indexed: 09/20/2023] Open
Abstract
CC97 and CC151 are two of the most common Staphylococcus aureus lineages associated with bovine intramammary infection. The genotype of the infecting S. aureus strain influences virulence and the progression of intramammary disease. Strains from CC97 and CC151 encode a distinct array of virulence factors. Identification of proteins elaborated in vivo will provide insights into the molecular mechanism of pathogenesis of these lineages, as well as facilitating the development of tailored treatments and pan-lineage vaccines and diagnostics. The repertoire of genes encoding cell wall-anchored (CWA) proteins was identified for S. aureus strains MOK023 (CC97) and MOK124 (CC151); MOK023 encoded more CWA proteins than MOK124. Serum collected during an in vivo challenge trial was used to investigate whether the humoral response to cell wall proteins was strain-specific. Immunoproteomic analysis demonstrated that the humoral response in MOK023-infected cows predominantly targeted high molecular weight proteins while the response in MOK124-infected cows targeted medium or low molecular weight proteins. Antigenic proteins were identified by two-dimensional serum blotting followed by mass spectometry-based identification of immunoreactive spots, with putative antigens subsequently validated. The CWA proteins ClfB, SdrE/Bbp and IsdA were identified as immunogenic regardless of the infecting strain. In addition, a number of putative strain-specific imunogens were identified. The variation in antigens produced by different strains may indicate that these strains have different strategies for exploiting the intramammary niche. Such variation should be considered when developing novel control strategies including vaccines, therapeutics and diagnostics.
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Affiliation(s)
- Shauna D Drumm
- Animal and Bioscience Department, Teagasc, Grange, Dunsany, Co. Meath, Ireland
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
- Seed Testing Laboratory, DAFM Laboratories, Backweston, Celbridge, Co. Kildare, Ireland
| | - Paul Cormican
- Animal and Bioscience Department, Teagasc, Grange, Dunsany, Co. Meath, Ireland
| | - Rebecca A Owens
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Jennifer Mitchell
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Orla M Keane
- Animal and Bioscience Department, Teagasc, Grange, Dunsany, Co. Meath, Ireland.
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4
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Dobrut A, Brzychczy-Włoch M. Immunogenic Proteins of Group B Streptococcus-Potential Antigens in Immunodiagnostic Assay for GBS Detection. Pathogens 2021; 11:43. [PMID: 35055991 PMCID: PMC8778278 DOI: 10.3390/pathogens11010043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/29/2021] [Accepted: 12/29/2021] [Indexed: 12/21/2022] Open
Abstract
Streptococcus agalactiae (Group B Streptococcus, GBS) is an opportunistic pathogen, which asymptomatically colonizes the gastrointestinal and genitourinary tract of up to one third of healthy adults. Nevertheless, GBS carriage in pregnant women may lead to several health issues in newborns causing life threatening infection, such as sepsis, pneumonia or meningitis. Recommended GBS screening in pregnant women significantly reduced morbidity and mortality in infants. Nevertheless, intrapartum antibiotic prophylaxis, recommended following the detection of carriage or in case of lack of a carriage test result for pregnant women who demonstrate certain risk factors, led to the expansion of the adverse phenomenon of bacterial resistance to antibiotics. In our paper, we reviewed some immunogenic GBS proteins, i.e., Alp family proteins, β protein, Lmb, Sip, BibA, FsbA, ScpB, enolase, elongation factor Tu, IMPDH, and GroEL, which possess features characteristic of good candidates for immunodiagnostic assays for GBS carriage detection, such as immunoreactivity and specificity. We assume that they can be used as an alternative diagnostic method to the presently recommended bacteriological cultivation and MALDI.
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Affiliation(s)
| | - Monika Brzychczy-Włoch
- Department of Molecular Medical Microbiology, Faculty of Medicine, Medical College, Jagiellonian University, 31-121 Krakow, Poland;
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5
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Approaching In Vivo Models of Pneumococcus-Host Interaction: Insights into Surface Proteins, Capsule Production, and Extracellular Vesicles. Pathogens 2021; 10:pathogens10091098. [PMID: 34578131 PMCID: PMC8471892 DOI: 10.3390/pathogens10091098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022] Open
Abstract
Infections caused by the Gram-positive bacterium Streptococcus pneumoniae have become a major health problem worldwide because of their high morbidity and mortality rates, especially in developing countries. This microorganism colonizes the human upper respiratory tract and becomes pathogenic under certain circumstances, which are not well known. In the interaction with the host, bacterial surface structures and proteins play major roles. To gain knowledge into gradual changes and adaptive mechanisms that this pathogen undergoes from when it enters the host, we mimicked several in vivo situations representing interaction with epithelial and macrophage cells, as well as a condition of presence in blood. Then, we analyzed, in four pneumococcal strains, two major surface structures, the capsule and extracellular vesicles produced by the pneumococci, as well as surface proteins by proteomics, using the “shaving” approach, followed by LC-MS/MS. We found important differences in both surface ultrastructures and proteins among the culture conditions and strains used. Thus, this work provides insights into physiological adaptations of the pneumococcus when it interacts with the host, which may be useful for the design of strategies to combat infections caused by this pathogen.
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6
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Comparative Exoproteome Analysis of Streptococcus suis Human Isolates. Microorganisms 2021; 9:microorganisms9061287. [PMID: 34204746 PMCID: PMC8231589 DOI: 10.3390/microorganisms9061287] [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: 04/25/2021] [Revised: 06/03/2021] [Accepted: 06/09/2021] [Indexed: 11/23/2022] Open
Abstract
The swine pathogen Streptococcus suis is a Gram-positive bacterium which causes infections in pigs, with an impact in animal health and in the livestock industry, and it is also an important zoonotic agent. During the infection process, surface and secreted proteins are essential in the interaction between microorganisms and their hosts. Here, we report a comparative proteomic analysis of the proteins released to the extracellular milieu in six human clinical isolates belonging to the highly prevalent and virulent serotype 2. The total secreted content was precipitated and analyzed by GeLC-MS/MS. In the six strains, 144 proteins assigned to each of the categories of extracellular or surface proteins were identified, as well as 680 predicted cytoplasmic proteins, many of which are putative moonlighting proteins. Of the nine predicted signal peptide-I secreted proteins, seven had relevant antigenic potential when they were analyzed through bioinformatic analysis. This is the first work comparing the exoproteome fraction of several human isolates of this important pathogen.
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7
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Bottagisio M, Barbacini P, Bidossi A, Torretta E, deLancey-Pulcini E, Gelfi C, James GA, Lovati AB, Capitanio D. Phenotypic Modulation of Biofilm Formation in a Staphylococcus epidermidis Orthopedic Clinical Isolate Grown Under Different Mechanical Stimuli: Contribution From a Combined Proteomic Study. Front Microbiol 2020; 11:565914. [PMID: 33013797 PMCID: PMC7505995 DOI: 10.3389/fmicb.2020.565914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 08/18/2020] [Indexed: 11/13/2022] Open
Abstract
One of the major causes of prosthetic joint failure is infection. Recently, coagulase negative Staphylococcus epidermidis has been identified as an emergent, nosocomial pathogen involved in subclinical prosthetic joint infections (PJIs). The diagnosis of PJIs mediated by S. epidermidis is usually complex and difficult due to the absence of acute clinical signs derived from the host immune system response. Therefore, analysis of protein patterns in biofilm-producing S. epidermidis allows for the examination of the molecular basis of biofilm formation. Thus, in the present study, the proteome of a clinical isolate S. epidermidis was analyzed when cultured in its planktonic or sessile form to examine protein expression changes depending on culture conditions. After 24 h of culture, sessile bacteria exhibited increased gene expression for ribosomal activity and for production of proteins related to the initial attachment phase, involved in the capsular polysaccharide/adhesin, surface associated proteins and peptidoglycan biosynthesis. Likewise, planktonic S. epidermidis was able to aggregate after 24 h, synthesizing the accumulation associate protein and cell-wall molecules through the activation of the YycFG and ArlRS, two component regulatory pathways. Prolonged culture under vigorous agitation generated a stressful growing environment triggering aggregation in a biofilm-like matrix as a mechanism to survive harsh conditions. Further studies will be essential to support these findings in order to further delineate the complex mechanisms of biofilm formation of S. epidermidis and they could provide the groundwork for the development of new drugs against biofilm-related infections, as well as the identification of novel biomarkers of subclinical or chronic infections mediated by these emerging, low virulence pathogens.
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Affiliation(s)
- Marta Bottagisio
- IRCCS Istituto Ortopedico Galeazzi, Laboratory of Clinical Chemistry and Microbiology, Milan, Italy
| | - Pietro Barbacini
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Alessandro Bidossi
- IRCCS Istituto Ortopedico Galeazzi, Laboratory of Clinical Chemistry and Microbiology, Milan, Italy
| | | | - Elinor deLancey-Pulcini
- Medical Biofilm Laboratory, Center for Biofilm Engineering, Montana State University, Bozeman, MT, United States
| | - Cecilia Gelfi
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy.,IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Garth A James
- Medical Biofilm Laboratory, Center for Biofilm Engineering, Montana State University, Bozeman, MT, United States
| | - Arianna B Lovati
- IRCCS Istituto Ortopedico Galeazzi, Cell and Tissue Engineering Laboratory, Milan, Italy
| | - Daniele Capitanio
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy.,IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
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8
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Siciliano RA, Lippolis R, Mazzeo MF. Proteomics for the Investigation of Surface-Exposed Proteins in Probiotics. Front Nutr 2019; 6:52. [PMID: 31069232 PMCID: PMC6491629 DOI: 10.3389/fnut.2019.00052] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 04/05/2019] [Indexed: 01/08/2023] Open
Abstract
Probiotics are commensal microorganisms that are present in the intestinal tract and in many fermented foods and positively affect human health, promoting digestion and uptake of dietary nutrients, strengthening intestinal barrier function, modulating immune response, and enhancing antagonism toward pathogens. The proteosurfaceome, i.e., the complex set of proteins present on the bacterial surface, is directly involved as leading actor in the dynamic communication between bacteria and host. In the last decade, the biological relevance of surface-exposed proteins prompted research activities exploiting the potentiality of proteomics to define the complex network of proteins that are involved in the molecular mechanisms at the basis of the adaptation to gastrointestinal environment and the probiotic effects. These studies also took advantages of the recent technological improvements in proteomics, mass spectrometry and bioinformatics that triggered the development of ad hoc designed innovative strategies to characterize the bacterial proteosurfaceome. This mini-review is aimed at describing the key role of proteomics in depicting the cell wall protein architecture and the involvement of surface-exposed proteins in the intimate and dynamic molecular dialogue between probiotics and intestinal epithelial and immune cells.
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Affiliation(s)
- Rosa Anna Siciliano
- Institute of Food Sciences, National Research Council (CNR-ISA), Avellino, Italy
| | - Rosa Lippolis
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR-IBIOM), Bari, Italy
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9
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Igrejas G, Correia S, Silva V, Hébraud M, Caniça M, Torres C, Gomes C, Nogueira F, Poeta P. Planning a One Health Case Study to Evaluate Methicillin Resistant Staphylococcus aureus and Its Economic Burden in Portugal. Front Microbiol 2018; 9:2964. [PMID: 30581421 PMCID: PMC6292916 DOI: 10.3389/fmicb.2018.02964] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/16/2018] [Indexed: 12/20/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most important multidrug-resistant nosocomial pathogens worldwide with infections leading to high rates of morbidity and mortality, a significant burden to human and veterinary clinical practices. The ability of S. aureus colonies to form biofilms on biotic and abiotic surfaces contributes further to its high antimicrobial resistance (AMR) rates and persistence in both host and non-host environments, adding a major ecological dimension to the problem. While there is a lot of information on MRSA prevalence in humans, data about MRSA in animal populations is scarce, incomplete and dispersed. This project is an attempt to evaluate the current epidemiological status of MRSA in Portugal by making a single case study from a One Health perspective. We aim to determine the prevalence of MRSA in anthropogenic sources liable to contaminate different animal habitats. The results obtained will be compiled with existing data on antibiotic resistant staphylococci from Portugal in a user-friendly database, to generate a geographically detailed epidemiological output for surveillance of AMR in MRSA. To achieve this, we will first characterize AMR and genetic lineages of MRSA circulating in northern Portugal in hospital wastewaters, farms near hospitals, farm animals that contact with humans, and wild animals. This will indicate the extent of the AMR problem in the context of local and regional human-animal-environment interactions. MRSA strains will then be tested for their ability to form biofilms. The proteomes of the strains will be compared to better elucidate their AMR mechanisms. Proteomics data will be integrated with the genomic and transcriptomic data obtained. The vast amount of information expected from this omics approach will improve our understanding of AMR in MRSA biofilms, and help us identify new vaccine candidates and biomarkers for early diagnosis and innovative therapeutic strategies to tackle MRSA biofilm-associated infections and potentially other AMR superbugs.
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Affiliation(s)
- Gilberto Igrejas
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,LAQV-REQUIMTE, Faculty of Science and Technology, University Nova of Lisbon, Lisbon, Portugal
| | - Susana Correia
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,LAQV-REQUIMTE, Faculty of Science and Technology, University Nova of Lisbon, Lisbon, Portugal.,Veterinary Science Department, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
| | - Vanessa Silva
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,LAQV-REQUIMTE, Faculty of Science and Technology, University Nova of Lisbon, Lisbon, Portugal.,Veterinary Science Department, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
| | - Michel Hébraud
- Université Clermont Auvergne, Institut National de la Recherche Agronomique, UMR0454 MEDiS, Centre Auvergne-Rhône-Alpes, Saint-Genès-Champanelle, France.,Institut National de la Recherche Agronomique, Plate-Forme d'Exploration du Métabolisme Composante Protéomique, UR0370 QuaPA, Centre Auvergne-Rhône-Alpes, Saint-Genès-Champanelle, France
| | - Manuela Caniça
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, Lisbon, Portugal
| | - Carmen Torres
- Área de Bioquímica y Biología Molecular, Universidad de La Rioja, Logroño, Spain.,Área de Microbiología Molecular, Centro de Investigación Biomédica de La Rioja, Logroño, Spain
| | - Catarina Gomes
- Centro de Administração e Políticas Públicas, Instituto Superior de Ciências Sociais e Políticas, Universidade de Lisboa, Lisbon, Portugal
| | - Fernanda Nogueira
- Centro de Administração e Políticas Públicas, Instituto Superior de Ciências Sociais e Políticas, Universidade de Lisboa, Lisbon, Portugal
| | - Patrícia Poeta
- LAQV-REQUIMTE, Faculty of Science and Technology, University Nova of Lisbon, Lisbon, Portugal.,Veterinary Science Department, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
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10
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Lin MH, Li CC, Shu JC, Chu HW, Liu CC, Wu CC. Exoproteome Profiling Reveals the Involvement of the Foldase PrsA in the Cell Surface Properties and Pathogenesis ofStaphylococcus aureus. Proteomics 2018; 18:e1700195. [DOI: 10.1002/pmic.201700195] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 01/08/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Mei-Hui Lin
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Department of Laboratory Medicine; Chang Gung Memorial Hospital; Linkou Tao-Yuan Taiwan
- Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
| | - Chi-Chun Li
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
| | - Jwu-Ching Shu
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Department of Laboratory Medicine; Chang Gung Memorial Hospital; Linkou Tao-Yuan Taiwan
- Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
| | - Hao-Wei Chu
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
| | - Chao-Chin Liu
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
| | - Chih-Ching Wu
- Department of Medical Biotechnology and Laboratory Science; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan Taiwan
- Molecular Medicine Research Center; Chang Gung University; Tao-Yuan Taiwan
- Department of Otolaryngology-Head & Neck Surgery; Chang Gung Memorial Hospital; Linkou Tao-Yuan Taiwan
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11
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Elongation factor Tu is a multifunctional and processed moonlighting protein. Sci Rep 2017; 7:11227. [PMID: 28894125 PMCID: PMC5593925 DOI: 10.1038/s41598-017-10644-z] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 08/10/2017] [Indexed: 01/10/2023] Open
Abstract
Many bacterial moonlighting proteins were originally described in medically, agriculturally, and commercially important members of the low G + C Firmicutes. We show Elongation factor Tu (Ef-Tu) moonlights on the surface of the human pathogens Staphylococcus aureus (SaEf-Tu) and Mycoplasma pneumoniae (MpnEf-Tu), and the porcine pathogen Mycoplasma hyopneumoniae (MhpEf-Tu). Ef-Tu is also a target of multiple processing events on the cell surface and these were characterised using an N-terminomics pipeline. Recombinant MpnEf-Tu bound strongly to a diverse range of host molecules, and when bound to plasminogen, was able to convert plasminogen to plasmin in the presence of plasminogen activators. Fragments of Ef-Tu retain binding capabilities to host proteins. Bioinformatics and structural modelling studies indicate that the accumulation of positively charged amino acids in short linear motifs (SLiMs), and protein processing promote multifunctional behaviour. Codon bias engendered by an A + T rich genome may influence how positively-charged residues accumulate in SLiMs.
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12
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Mekonnen SA, Palma Medina LM, Glasner C, Tsompanidou E, de Jong A, Grasso S, Schaffer M, Mäder U, Larsen AR, Gumpert H, Westh H, Völker U, Otto A, Becher D, van Dijl JM. Signatures of cytoplasmic proteins in the exoproteome distinguish community- and hospital-associated methicillin-resistant Staphylococcus aureus USA300 lineages. Virulence 2017; 8:891-907. [PMID: 28475476 PMCID: PMC5626246 DOI: 10.1080/21505594.2017.1325064] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is the common name for a heterogeneous group of highly drug-resistant staphylococci. Two major MRSA classes are distinguished based on epidemiology, namely community-associated (CA) and hospital-associated (HA) MRSA. Notably, the distinction of CA- and HA-MRSA based on molecular traits remains difficult due to the high genomic plasticity of S. aureus. Here we sought to pinpoint global distinguishing features of CA- and HA-MRSA through a comparative genome and proteome analysis of the notorious MRSA lineage USA300. We show for the first time that CA- and HA-MRSA isolates can be distinguished by 2 distinct extracellular protein abundance clusters that are predictive not only for epidemiologic behavior, but also for their growth and survival within epithelial cells. This ‘exoproteome profiling’ also groups more distantly related HA-MRSA isolates into the HA exoproteome cluster. Comparative genome analysis suggests that these distinctive features of CA- and HA-MRSA isolates relate predominantly to the accessory genome. Intriguingly, the identified exoproteome clusters differ in the relative abundance of typical cytoplasmic proteins, suggesting that signatures of cytoplasmic proteins in the exoproteome represent a new distinguishing feature of CA- and HA-MRSA. Our comparative genome and proteome analysis focuses attention on potentially distinctive roles of ‘liberated’ cytoplasmic proteins in the epidemiology and intracellular survival of CA- and HA-MRSA isolates. Such extracellular cytoplasmic proteins were recently invoked in staphylococcal virulence, but their implication in the epidemiology of MRSA is unprecedented.
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Affiliation(s)
- Solomon A Mekonnen
- a Department of Medical Microbiology , University of Groningen, University Medical Center, Groningen , Groningen , The Netherlands
| | - Laura M Palma Medina
- b Interfaculty Institute for Genetics and Functional Genomics , University Medicine Greifswald , Greifswald , Germany
| | - Corinna Glasner
- a Department of Medical Microbiology , University of Groningen, University Medical Center, Groningen , Groningen , The Netherlands
| | - Eleni Tsompanidou
- a Department of Medical Microbiology , University of Groningen, University Medical Center, Groningen , Groningen , The Netherlands
| | - Anne de Jong
- c Department of Molecular Genetics , University of Groningen, Groningen Biomolecular Sciences and Biotechnology Institute , Groningen , The Netherlands
| | - Stefano Grasso
- a Department of Medical Microbiology , University of Groningen, University Medical Center, Groningen , Groningen , The Netherlands
| | - Marc Schaffer
- b Interfaculty Institute for Genetics and Functional Genomics , University Medicine Greifswald , Greifswald , Germany
| | - Ulrike Mäder
- b Interfaculty Institute for Genetics and Functional Genomics , University Medicine Greifswald , Greifswald , Germany
| | - Anders R Larsen
- d National Center for Antimicrobials and Infection Control , Statens Serum Institut , Copenhagen , Denmark
| | - Heidi Gumpert
- e Department of Clinical Microbiology , Hvidovre University Hospital , Hvidovre , Denmark
| | - Henrik Westh
- e Department of Clinical Microbiology , Hvidovre University Hospital , Hvidovre , Denmark.,f Department of Clinical Medicine, Faculty of Health , University of Copenhagen , Copenhagen , Denmark
| | - Uwe Völker
- b Interfaculty Institute for Genetics and Functional Genomics , University Medicine Greifswald , Greifswald , Germany
| | - Andreas Otto
- g Institut für Mikrobiologie, Ernst-Moritz-Arndt-Universität Greifswald , Greifswald , Germany
| | - Dörte Becher
- g Institut für Mikrobiologie, Ernst-Moritz-Arndt-Universität Greifswald , Greifswald , Germany
| | - Jan Maarten van Dijl
- a Department of Medical Microbiology , University of Groningen, University Medical Center, Groningen , Groningen , The Netherlands
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13
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Kylväjä R, Ojalehto T, Kainulainen V, Virkola R, Westerlund-Wikström B. Penicillin binding protein 3 of Staphylococcus aureus NCTC 8325-4 binds and activates human plasminogen. BMC Res Notes 2016; 9:389. [PMID: 27488131 PMCID: PMC4972960 DOI: 10.1186/s13104-016-2190-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 07/28/2016] [Indexed: 11/25/2022] Open
Abstract
Background Staphylococcus aureus is a versatile pathogen expressing a number of virulence-associated adhesive molecules. In a previous study, we generated in a secretion-competent Escherichia coli strain a library of random FLAG-tag positive (FTP) polypeptides of S. aureus. To identify adhesive proteins and gain additional knowledge on putative virulence factors of S. aureus, we here screened the FTP library against human serum proteins. Findings Staphylococcus aureus NCTC 8325-4, origin of the FTP library, adhered to immobilized plasminogen in vitro. In an enzyme-linked immunoassay a C-terminal part of penicillin binding protein 3 (PBP3), included in the FTP library, bound to immobilized plasminogen. We expressed and purified full-length PBP3 and its C-terminal fragments as recombinant proteins. In a time-resolved fluorometry—based assay the PBP3 polypeptides bound to immobilized plasminogen. The polypeptides enhanced formation of plasmin from plasminogen as analyzed by cleavage of a chromogenic plasmin substrate. Conclusions The present findings, although preliminary, demonstrate reliably that S. aureus NCTC 8325-4 adheres to immobilized plasminogen in vitro and that the adhesion may be mediated by a C-terminal fragment of the PBP3 protein. The full length PBP3 and the penicillin binding C-terminal domain of PBP3 expressed as recombinant proteins bound plasminogen and activated plasminogen to plasmin. These phenomena were inhibited by the lysine analogue ε-aminocaproic acid suggesting that the binding is mediated by lysine residues. A detailed molecular description of surface molecules enhancing the virulence of S. aureus will aid in understanding of its pathogenicity and help in design of antibacterial drugs in the future. Electronic supplementary material The online version of this article (doi:10.1186/s13104-016-2190-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Riikka Kylväjä
- General Microbiology, Department of Biosciences, University of Helsinki, P.O.Box 56, FI-00014, University of Helsinki, Helsinki, Finland.,Thermo Fisher Scientific, Ratastie 2, 01620, Vantaa, Finland
| | - Tuomas Ojalehto
- General Microbiology, Department of Biosciences, University of Helsinki, P.O.Box 56, FI-00014, University of Helsinki, Helsinki, Finland.,Orion Diagnostica, Koivu-Mankkaan tie 6, 02200, Espoo, Finland
| | - Veera Kainulainen
- General Microbiology, Department of Biosciences, University of Helsinki, P.O.Box 56, FI-00014, University of Helsinki, Helsinki, Finland.,Pharmacology, Faculty of Medicine, University of Helsinki, P.O.Box 63, FI-00014, University of Helsinki, Helsinki, Finland
| | - Ritva Virkola
- General Microbiology, Department of Biosciences, University of Helsinki, P.O.Box 56, FI-00014, University of Helsinki, Helsinki, Finland
| | - Benita Westerlund-Wikström
- General Microbiology, Department of Biosciences, University of Helsinki, P.O.Box 56, FI-00014, University of Helsinki, Helsinki, Finland.
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