Identification of Acyl-Homoserine Lactone Signal Molecules Produced by Nitrosomonas europaea Strain Schmidt

Author:

Burton E. O.1,Read H. W.2,Pellitteri M. C.2,Hickey W. J.12

Affiliation:

1. Molecular and Environmental Toxicology Center

2. Department of Soil Science, University of Wisconsin—Madison, Madison, Wisconsin

Abstract

ABSTRACT Nitrosomonas europaea strain Schmidt produces at least three acyl homoserine lactone (AHL) signal molecules: C 6 -homoserine lactone (HSL), C 8 -HSL, and C 10 -HSL. These compounds were identified in extracts of chemostat culture effluent by three independent methods. The concentrations of AHL in effluent were low (0.4 to 2.2 nM) but within the range known to induce AHL-responsive systems. The absence of LuxI and LuxM homologs from the genome of N. europaea strain Schmidt suggested that AHL synthesis occurs by an alternate pathway, possibly mediated by an HdtS homolog. To the best of our knowledge, the present report is the first to document the types and levels of AHLs produced by N. europaea .

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

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