Secretion of extracellular proteins by Pseudomonas aeruginosa

Biochimie
A LazdunskiM Murgier

Abstract

Pseudomonas aeruginosa is a bacterial species of commercial value secreting numerous extracellular proteins, involved in pathogenesis. Most strains produce at least a lipase, a phospholipase, an alkaline phosphatase, an exotoxin and 2 proteases (elastase and alkaline protease). Various mechanisms for secretion of exoproteins appear to exist in P aeruginosa. Genetic analysis has led to the identification of 2 secretion pathways: i) a "general" secretion pathway, defined by the xcp mutations, which mediates secretion of most extracellular proteins, and; ii) an independent secretion pathway specific for alkaline protease. Our present knowledge on the pathways and components of the secretion machinery in P aeruginosa is reviewed in this article.

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