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Mamani S, Moinier D, Denis Y, Soulère L, Queneau Y, Talla E, Bonnefoy V, Guiliani N. Insights into the Quorum Sensing Regulon of the Acidophilic Acidithiobacillus ferrooxidans Revealed by Transcriptomic in the Presence of an Acyl Homoserine Lactone Superagonist Analog. Front Microbiol 2016; 7:1365. [PMID: 27683573 PMCID: PMC5021923 DOI: 10.3389/fmicb.2016.01365] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 08/17/2016] [Indexed: 12/13/2022] Open
Abstract
While a functional quorum sensing system has been identified in the acidophilic chemolithoautotrophic Acidithiobacillus ferrooxidans ATCC 23270(T) and shown to modulate cell adhesion to solid substrates, nothing is known about the genes it regulates. To address the question of how quorum sensing controls biofilm formation in A. ferrooxidans (T), the transcriptome of this organism in conditions in which quorum sensing response is stimulated by a synthetic superagonist AHL (N-acyl homoserine lactones) analog has been studied. First, the effect on biofilm formation of a synthetic AHL tetrazolic analog, tetrazole 9c, known for its agonistic QS activity, was assessed by fluorescence and electron microscopy. A fast adherence of A. ferrooxidans (T) cells on sulfur coupons was observed. Then, tetrazole 9c was used in DNA microarray experiments that allowed the identification of genes regulated by quorum sensing signaling, and more particularly, those involved in early biofilm formation. Interestingly, afeI gene, encoding the AHL synthase, but not the A. ferrooxidans quorum sensing transcriptional regulator AfeR encoding gene, was shown to be regulated by quorum sensing. Data indicated that quorum sensing network represents at least 4.5% (141 genes) of the ATCC 23270(T) genome of which 42.5% (60 genes) are related to biofilm formation. Finally, AfeR was shown to bind specifically to the regulatory region of the afeI gene at the level of the palindromic sequence predicted to be the AfeR binding site. Our results give new insights on the response of A. ferrooxidans to quorum sensing and on biofilm biogenesis.
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Affiliation(s)
- Sigde Mamani
- Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, Aix Marseille Université, Centre National de la Recherche ScientifiqueMarseille, France; Laboratorio de Comunicación Bacteriana, Departamento de Biología, Facultad de Ciencias, Universitad de ChileSantiago, Chile
| | - Danielle Moinier
- Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, Aix Marseille Université, Centre National de la Recherche Scientifique Marseille, France
| | - Yann Denis
- Plateforme Transcriptome, Institut de Microbiologie de la Méditerranée, Aix Marseille Université, Centre National de la Recherche Scientifique Marseille, France
| | - Laurent Soulère
- Université Lyon, Institut National des Sciences Appliquées de Lyon, UMR 5246, Centre National de la Recherche Scientifique, Université Lyon 1, École Supérieure de Chimie Physique Electronique de Lyon, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires Villeurbanne, France
| | - Yves Queneau
- Université Lyon, Institut National des Sciences Appliquées de Lyon, UMR 5246, Centre National de la Recherche Scientifique, Université Lyon 1, École Supérieure de Chimie Physique Electronique de Lyon, Institut de Chimie et de Biochimie Moléculaires et Supramoléculaires Villeurbanne, France
| | - Emmanuel Talla
- Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, Aix Marseille Université, Centre National de la Recherche Scientifique Marseille, France
| | - Violaine Bonnefoy
- Laboratoire de Chimie Bactérienne, Institut de Microbiologie de la Méditerranée, Aix Marseille Université, Centre National de la Recherche Scientifique Marseille, France
| | - Nicolas Guiliani
- Laboratorio de Comunicación Bacteriana, Departamento de Biología, Facultad de Ciencias, Universitad de Chile Santiago, Chile
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Elguindi J, Hao X, Lin Y, Alwathnani HA, Wei G, Rensing C. Advantages and challenges of increased antimicrobial copper use and copper mining. Appl Microbiol Biotechnol 2011; 91:237-49. [DOI: 10.1007/s00253-011-3383-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 05/11/2011] [Accepted: 05/11/2011] [Indexed: 12/24/2022]
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Affiliation(s)
- Dianne K. Newman
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
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