NDLI: Quantitative proteomic analysis indicates increased synthesis of a quinolone by Pseudomonas aeruginosa isolates from cystic fibrosis airways

Content Provider	PubMed Central
Author	Guina, Tina Purvine, Samuel O. Yi, Eugene C. Eng, Jimmy Goodlett, David R. Aebersold, Ruedi Miller, Samuel I.
Copyright Year	2003
Abstract	The opportunistic bacterial pathogen Pseudomonas aeruginosa colonizes airways of individuals with cystic fibrosis (CF) with resultant chronic destructive lung disease. P. aeruginosa adaptation to the CF airway includes biofilm formation and antibiotic resistance. Isolates from asymptomatic individuals in the first 3 years of life have unique characteristics, suggesting that adaptation occurs before clinical symptoms. One defined early adaptation is expression of a specific proinflammatory lipopolysaccharide (LPS) that is associated with antimicrobial peptide resistance. This CF-specific LPS is induced when P. aeruginosa is grown in medium that is limited for magnesium. Therefore, qualitative and quantitative proteomic approaches were used to define 1,331 P. aeruginosa proteins, of which 145 were differentially expressed on limitation of magnesium. Among proteins induced by low magnesium were enzymes essential for production of 2-heptyl 3-hydroxy 4-quinolone, the Pseudomonas quinolone signal (PQS), which interacts with the homoserine lactone signaling pathway. Measurement of PQS in P. aeruginosa isolates from asymptomatic children with CF indicated that strains with increased synthesis of PQS are present during early colonization of CF patient airways.
Related Links	http://dx.doi.org/10.1073/pnas.0435846100
Ending Page	2776
Page Count	6
Starting Page	2771
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	5
Volume Number	100
Language	English
Publisher	The National Academy of Sciences
Publisher Date	2003-03-04
Access Restriction	Open
Rights Holder	The National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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