Proteomics

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Exposure to Pseudomonas aeruginosa secretome alters the proteome and secondary metabolite production of Aspergillus fumigatus.


ABSTRACT: The fungal pathogen Aspergillus fumigatus is frequently cultured from the sputum of cystic fibrosis (CF) patients along with the bacterium, Pseudomonas aeruginosa. A. fumigatus secretes a range of secondary metabolites, and one of these, gliotoxin, has inhibitory effects on the host immune response. In this study, the effect of P. aeruginosa culture filtrate (CuF) on fungal growth and gliotoxin production was investigated. Exposure of A. fumigatus hyphae to P. aeruginosa cells induced increased production of gliotoxin and a decrease in fungal growth. In contrast exposure of A. fumigatus hyphae to P. aeruginosa CuF lead to increased growth and decreased gliotoxin production. Quantitative proteomic analysis was employed to characterize the proteomic response of A. fumigatus upon exposure to P. aeruginosa CuF. Changes in the profile of proteins involved with secondary metabolite biosynthesis (gliotoxin, fumagillin, pseurotin A), and changes to the abundance of proteins involved in oxidative stress (e.g. formate dehydrogenase) and detoxification (e.g. thioredoxin reductase) were observed, suggesting that the bacterial secretome has a profound effect on the fungal proteome. Alterations in the abundance of proteins involved in detoxification and oxidative stress, highlight the ability of A. fumigatus to differentially regulate protein synthesis in response to environmental stresses imposed by competitors such as P. aeruginosa. Such responses may ultimately have serious detrimental effects on the host.

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Neosartorya Fumigata (aspergillus Fumigatus)

TISSUE(S): Hyphal Cell

DISEASE(S): Cystic Fibrosis

SUBMITTER: James Carolan  

LAB HEAD: Jim Carolan

PROVIDER: PXD030171 | Pride | 2023-03-10

REPOSITORIES: Pride

Dataset's files

Source:
Action DRS
1_Asp_Asp_CuF_Rep_1.raw Raw
21__Asp_Pseudo_CuF_Rep_1.raw Raw
22_Asp_Pseudo_CuF_Rep_2.raw Raw
23_Asp_Pseudo_CuF_Rep_3.raw Raw
24_Asp_Pseudo_CuF_Rep_4.raw Raw
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Exposure to the <i>Pseudomonas aeruginosa</i> secretome alters the proteome and secondary metabolite production of <i>Aspergillus fumigatus</i>.

Margalit Anatte A   Sheehan David D   Carolan James C JC   Kavanagh Kevin K  

Microbiology (Reading, England) 20220301 3


The fungal pathogen <i>Aspergillus fumigatus</i> is frequently cultured from the sputum of cystic fibrosis (CF) patients along with the bacterium <i>Pseudomonas aeruginosa. A. fumigatus</i> secretes a range of secondary metabolites, and one of these, gliotoxin, has inhibitory effects on the host immune response. The effect of <i>P. aeruginosa</i> culture filtrate (CuF) on fungal growth and gliotoxin production was investigated. Exposure of <i>A. fumigatus</i> hyphae to <i>P. aeruginosa</i> cells  ...[more]

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