Abstract
ABSTRACT The luminescent entomopathogenic bacterium Photorhabdus luminescens produces several yet-uncharacterized broad-spectrum antibiotics. We report the identification and characterization of a cluster of eight genes (named cpmA to cpmH ) responsible for the production of a carbapenem-like antibiotic in strain TT01 of P. luminescens . The cpm cluster differs in several crucial aspects from other car operons. The level of cpm mRNA peaks during exponential phase and is regulated by a Rap/Hor homolog identified in the P. luminescens genome. Marker-exchange mutagenesis of this gene in the entomopathogen decreased antibiotic production. The luxS -like signaling mechanism of quorum sensing also plays a role in the regulation of the cpm operon. Indeed, luxS , which is involved in the production of a newly identified autoinducer, is responsible for repression of cpm gene expression at the end of the exponential growth phase. The importance of this carbapenem production in the ecology of P. luminescens is discussed.
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Dates
Type | When |
---|---|
Created | 22 years, 11 months ago (Oct. 1, 2002, 3:36 p.m.) |
Deposited | 3 years, 6 months ago (Feb. 23, 2022, 8:17 a.m.) |
Indexed | 1 month, 2 weeks ago (July 20, 2025, 12:21 a.m.) |
Issued | 23 years, 1 month ago (Aug. 1, 2002) |
Published | 23 years, 1 month ago (Aug. 1, 2002) |
Published Print | 23 years, 1 month ago (Aug. 1, 2002) |
@article{Derzelle_2002, title={Identification, Characterization, and Regulation of a Cluster of Genes Involved in Carbapenem Biosynthesis in Photorhabdus luminescens}, volume={68}, ISSN={1098-5336}, url={http://dx.doi.org/10.1128/aem.68.8.3780-3789.2002}, DOI={10.1128/aem.68.8.3780-3789.2002}, number={8}, journal={Applied and Environmental Microbiology}, publisher={American Society for Microbiology}, author={Derzelle, Sylviane and Duchaud, Eric and Kunst, Frank and Danchin, Antoine and Bertin, Philippe}, year={2002}, month=aug, pages={3780–3789} }