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Singh S, Gupta S, Singh B, Sharma SK, Gupta VK, Sharma GL. Proteomic characterization of Aspergillus fumigatus treated with an antifungal coumarin for identification of novel target molecules of key pathways. J Proteome Res 2012; 11:3259-68. [PMID: 22533410 DOI: 10.1021/pr300006j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A synthetic coumarin, N,N,N-triethyl-11-(4-methyl-2-oxo-2H-chromen-7-yloxy)-11-oxoundecan-1-aminium bromide (SCD-1), having potent activity against pathogenic Aspergilli (MIC90 15.62 μg/mL), was investigated to identify its molecular targets in the pathogen. The proteome of Aspergillus fumigatus was developed after treatment with sublethal doses of compound and analyzed. The results demonstrated 143 differentially expressed proteins on treatment with SCD-1. The expression of four proteins, namely cell division control protein, ubiquitin-like activating enzyme, vacuolar ATP synthase catalytic subunit A, and UTP-glucose-1-phosphate uridylyltransferase of A. fumigatus, was completely inhibited, whereas there were 13 newly expressed and 96 overexpressed proteins, mainly belonging to stress pathway. The treatment of A. fumigatus with SCD-1 also led to attenuation of proteins involved in cell replication and other important biosynthetic processes, including riboflavin biosynthesis, which has been pathogen-specific. In addition to key enzymatic players and antioxidants, nine hypothetical proteins were also identified, seven of which have been novel, being described for the first time. As no cellular functions have yet been described for these hypothetical proteins, their alteration in response to SCD-1 provides significant information about their putative roles in pathogen defense.
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Affiliation(s)
- Seema Singh
- Division of Diagnostics and Biochemistry, CSIR-Institute of Genomics and Integrative Biology , University Campus, Mall Road, Delhi-110007, India
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Kniemeyer O, Schmidt AD, Vödisch M, Wartenberg D, Brakhage AA. Identification of virulence determinants of the human pathogenic fungi Aspergillus fumigatus and Candida albicans by proteomics. Int J Med Microbiol 2011; 301:368-77. [PMID: 21565549 DOI: 10.1016/j.ijmm.2011.04.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Both fungi Candida albicans and Aspergillus fumigatus can cause a number of life-threatening systemic infections in humans. The commensal yeast C. albicans is one of the main causes of nosocomial fungal infectious diseases, whereas the filamentous fungus A. fumigatus has become one of the most prevalent airborne fungal pathogens. Early diagnosis of these fungal infections is challenging, only a limited number of antifungals for treatment are available, and the molecular details of pathogenicity are hardly understood. The completion of both the A. fumigatus and C. albicans genome sequence provides the opportunity to improve diagnosis, to define new drug targets, to understand the functions of many uncharacterised proteins, and to study protein regulation on a global scale. With the application of proteomic tools, particularly two-dimensional gel electrophoresis and LC/MS-based methods, a comprehensive overview about the proteins of A. fumigatus and C. albicans present or induced during environmental changes and stress conditions has been obtained in the past 5 years. However, for the discovery of further putative virulence determinants, more sensitive and targeted proteomic methods have to be applied. Here, we review the recent proteome data generated for A. fumigatus and C. albicans that are related to factors required for pathogenicity.
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Affiliation(s)
- Olaf Kniemeyer
- Dept. of Molecular and Applied Microbiology, Leibniz Institute for Natural Product Research and Infection Biology - Hans-Knöll-Institute (HKI), Jena, Germany.
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Singh B, Sharma GL, Oellerich M, Kumar R, Singh S, Bhadoria DP, Katyal A, Reichard U, Asif AR. Novel cytosolic allergens of Aspergillus fumigatus identified from germinating conidia. J Proteome Res 2010; 9:5530-41. [PMID: 20828162 DOI: 10.1021/pr100605c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aspergillus fumigatus is the common cause of allergic broncho-pulmonary aspergillosis (ABPA) and most of the allergens have been described from its secreted fraction. In the present investigation, germinating conidial cytosolic proteins of A. fumigatus were extracted from a 16 h culture. The proteome from this fraction was developed, and immuno-blots were generated using pooled ABPA patients' sera. Well separated Immunoglobulin-E (IgE) and Immunoglobulin-G (IgG) reactive spots were picked from corresponding 2DE gels and subjected to mass spectrometric analysis. As a result, 66 immuno-reactive proteins were identified from two geographically different strains (190/96 and DAYA) of A. fumigatus. Only 3 out of 66 proteins reacted with IgG, and the remaining 63 proteins were found to be IgE reactive. These 63 IgE-reactive cytosolic proteins from germinating conidia included 2 already known (Asp f12 and Asp f22) and 4 predicted allergens (Hsp88, Hsp70, malate dehydrogenase, and alcohol dehydrogenase) based on their homology with other known fungal allergens. In view of this, the panel of presently identified IgE-reactive novel proteins holds the potential of providing a basis for the wider diagnostic application in assay for allergic aspergillosis. We could demonstrate that recombinantly expressed proteins from this panel showed consistent reactivity with IgE of individual sera of ABPA patients. The recombinantly expressed proteins may also be useful in desensitization therapy of allergic disorders including ABPA.
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Affiliation(s)
- Bharat Singh
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, Delhi-110007, India
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Singh B, Oellerich M, Kumar R, Kumar M, Bhadoria DP, Reichard U, Gupta VK, Sharma GL, Asif AR. Immuno-Reactive Molecules Identified from the Secreted Proteome of Aspergillus fumigatus. J Proteome Res 2010; 9:5517-29. [DOI: 10.1021/pr100604x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Bharat Singh
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Michael Oellerich
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Ram Kumar
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Manish Kumar
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Dharam P. Bhadoria
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Utz Reichard
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Vijay K. Gupta
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Gainda L. Sharma
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
| | - Abdul R. Asif
- Division of Diagnostics and Biochemistry, Institute of Genomics and Integrative Biology, University Campus, Mall Road, Delhi-110007, India, Department of Clinical Chemistry, University Medical Center Goettingen, Robert-Koch-Str.40, D-37075 Goettingen, Germany, Department of Medicine, Maulana Azad Medical College, Bahadur Shah Zafar Marg, New Delhi-110002, India, Department of Medical Microbiology and National Reference Center for Systemic Mycoses, University Medical Center Goettingen, Kreuzburgring 57, D
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