MassIVE MSV000082917

Imported Reanalysis Dataset Public PXD001373

Major Proteomic Changes Associated with Amyloid Induced Biofilm Formation in Pseudomonas aeruginosa PAO1

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Description

The newly identified functional amyloids in Pseudomonas (Fap) are associated with increased aggregation and biofilm formation in the opportunistic pathogen P. aeruginosa. However, whether this phenomenon can be simply ascribed to the mechanical properties of the amyloid fibrils remains undetermined. To gain a deeper understanding of the Fap mediated biofilm formation, the physiological consequences of Fap expression were investigated using label-free protein quantification. The functional amyloids were found to not solely act as inert structural biofilm components. Their presence induced major changes in the global proteome of the bacterium. These included the lowered abundance of classical virulence factors such as elastase B and the secretion system of alkaline protease A. Amyloid mediated biofilm formation furthermore increased abundance of the alginate and pyoverdine synthesis machinery, turning P. aeruginosa PAO1 into an unexpected mucoid phenotype. The results imply a significant impact of functional amyloids in P. aeruginosa for biofilm formation and chronic infections. [dataset license: CC0 1.0 Universal (CC0 1.0)]

Keywords: Functional amyloids ; Pseudomonas aeruginosa PAO1 ; Microbial proteomics ; Biofilms ; Cystic fibrosis ; Chronic infection

Contact

Principal Investigators:
(in alphabetical order) 		Per Halkj��r Nielsen, Head of Center for Microbial Communities Department of Biotechnology, Chemistry and Environmental Engineering| Aalborg University | Fredrik Bajersvej 7H | 9220 Aalborg ��st | Denmark, N/A
Submitting User: ccms

Publications

Herbst FA, Søndergaard MT, Kjeldal H, Stensballe A, Nielsen PH, Dueholm MS.
Major proteomic changes associated with amyloid-induced biofilm formation in Pseudomonas aeruginosa PAO1.
J. Proteome Res. 2015 Jan 2;14(1):72-81. Epub 2014 Oct 31.

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