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Transcriptomic Analysis of the Sulfate Starvation Response ofPseudomonas aeruginosa
Author(s) -
Tewes Tralau,
Stéphane Vuilleumier,
Christelle Thibault-Carpentier,
Barry J. Campbell,
C. A. Hart,
Michael A. Kertesz
Publication year - 2007
Publication title -
journal of bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.652
H-Index - 246
eISSN - 1067-8832
pISSN - 0021-9193
DOI - 10.1128/jb.00889-07
Subject(s) - biology , pseudomonas aeruginosa , methionine , transcriptome , mucin , microbiology and biotechnology , gene , sulfur , cystic fibrosis , bacteria , biochemistry , gene expression , genetics , chemistry , amino acid , organic chemistry
Pseudomonas aeruginosa is an opportunistic pathogen that causes a number of infections in humans, but is best known for its association with cystic fibrosis. It is able to use a wide range of sulfur compounds as sources of sulfur for growth. Gene expression in response to changes in sulfur supply was studied inP. aeruginosa E601, a cystic fibrosis isolate that displays mucin sulfatase activity, and inP. aeruginosa PAO1. A large family of genes was found to be upregulated by sulfate limitation in both isolates, encoding sulfatases and sulfonatases, transport systems, oxidative stress proteins, and a sulfate-regulated TonB/ExbBD complex. These genes were localized in five distinct islands on the genome and encoded proteins with a significantly reduced content of cysteine and methionine. Growth ofP. aeruginosa E601 with mucin as the sulfur source led not only to a sulfate starvation response but also to induction of genes involved with type III secretion systems.

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