Analysis of secreted proteins from Aspergillus flavus

Martha L. Medina, Paul A. Haynes, Linda Breci, Wilson A. Francisco

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

MS/MS techniques in proteomics make possible the identification of proteins from organisms with little or no genome sequence information available. Peptide sequences are obtained from tandem mass spectra by matching peptide mass and fragmentation information to protein sequence information from related organisms, including unannotated genome sequence data. This peptide identification data can then be grouped and reconstructed into protein data. In this study, we have used this approach to study protein secretion by Aspergillus flavus, a filamentous fungus for which very little genome sequence information is available. A. flavus is capable of degrading the flavonoid rutin (quercetin 3-O-glycoside), as the only source of carbon via an extracellular enzyme system. In this continuing study, a proteomic analysis was used to identify secreted proteins from A. flavus when grown on rutin. The growth media glucose and potato dextrose were used to identify differentially expressed secreted proteins. The secreted proteins were analyzed by 1- and 2-DE and MS/MS. A total of 51 unique A. flavus secreted proteins were identified from the three growth conditions. Ten proteins were unique to rutin-, five to glucose- and one to potato dextrose-grown A. flavus. Sixteen secreted proteins were common to all three media. Fourteen identifications were of hypothetical proteins or proteins of unknown functions. To our knowledge, this is the first extensive proteomic study conducted to identify the secreted proteins from a filamentous fungus.

Original languageEnglish (US)
Pages (from-to)3153-3161
Number of pages9
JournalProteomics
Volume5
Issue number12
DOIs
StatePublished - Aug 2005

Fingerprint

Aspergillus flavus
Aspergillus
Proteins
Rutin
Proteomics
Glucose
Genes
Genome
Solanum tuberosum
Fungi
Peptides
Quercetin
Staphylococcal Protein A
Growth
Glycosides
Flavonoids
Carbon

Keywords

  • Aspergillus flavus
  • Dispensable metabolic pathways
  • Rutin degradation
  • Secreted proteins
  • Tandem mass spectrometry

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

Cite this

Medina, M. L., Haynes, P. A., Breci, L., & Francisco, W. A. (2005). Analysis of secreted proteins from Aspergillus flavus. Proteomics, 5(12), 3153-3161. https://doi.org/10.1002/pmic.200401136

Analysis of secreted proteins from Aspergillus flavus. / Medina, Martha L.; Haynes, Paul A.; Breci, Linda; Francisco, Wilson A.

In: Proteomics, Vol. 5, No. 12, 08.2005, p. 3153-3161.

Research output: Contribution to journalArticle

Medina, ML, Haynes, PA, Breci, L & Francisco, WA 2005, 'Analysis of secreted proteins from Aspergillus flavus', Proteomics, vol. 5, no. 12, pp. 3153-3161. https://doi.org/10.1002/pmic.200401136
Medina ML, Haynes PA, Breci L, Francisco WA. Analysis of secreted proteins from Aspergillus flavus. Proteomics. 2005 Aug;5(12):3153-3161. https://doi.org/10.1002/pmic.200401136
Medina, Martha L. ; Haynes, Paul A. ; Breci, Linda ; Francisco, Wilson A. / Analysis of secreted proteins from Aspergillus flavus. In: Proteomics. 2005 ; Vol. 5, No. 12. pp. 3153-3161.
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