Research Topics
Genomes and Genes | Vittorio VenturiSummaryAffiliation: International Centre for Genetic Engineering and Biotechnology Country: Italy Publications
| Collaborators
|
Detail Information
Publications
The virtue of temperance: built-in negative regulators of quorum sensing in PseudomonasVittorio Venturi
International Centre for Genetic Engineering and Biotechnology, Padriciano, 99, 34012 Trieste, Italy
Mol Microbiol 82:1060-70. 2011..This review focuses on the role played by RsaL and RsaM repressors and discusses the important implications of this control of the QS response...
A simple model for the early events of quorum sensing in Pseudomonas aeruginosa: modeling bacterial swarming as the movement of an "activation zone"Sergiu Netotea
Biological Research Center of the Hungarian Academy of Sciences, Szeged, Hungary
Biol Direct 4:6. 2009..While there are a variety of models for bacterial colony morphology, there is little work linking QS genes to movement in an open system...- Assessment of three Resistance-Nodulation-Cell Division drug efflux transporters of Burkholderia cenocepacia in intrinsic antibiotic resistanceSilvia Buroni
Department of Genetics and Microbiology, University of Pavia, Pavia, Italy
BMC Microbiol 9:200. 2009..cenocepacia J2315, but the contribution of these pumps to the intrinsic drug resistance of this bacterium remains unclear... - Tobramycin at subinhibitory concentration inhibits the RhlI/R quorum sensing system in a Pseudomonas aeruginosa environmental isolateFedora Babic
Department of Biochemistry and Molecular Biology, University of Zagreb, Croatia
BMC Infect Dis 10:148. 2010..These have shown that subinhibitory concentrations (SICs) of tobramycin induce biofilm formation and enhance the capabilities of P. aeruginosa to colonize specific environments... 
Regulation of quorum sensing in PseudomonasVittorio Venturi
International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
FEMS Microbiol Rev 30:274-91. 2006..This review will focus on the regulation of quorum sensing in Pseudomonas, highlighting a complex response that might serve a given species to adapt in its particular environment...- Co-swarming and local collapse: quorum sensing conveys resilience to bacterial communities by localizing cheater mutants in Pseudomonas aeruginosaVittorio Venturi
International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
PLoS ONE 5:e9998. 2010..Deleting various genes of this machinery leads to cheater mutants impaired in various aspects of swarming cooperation... - Quorum sensing in the Burkholderia cepacia complexVittorio Venturi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
Res Microbiol 155:238-44. 2004..In the last four years HSL-dependent quorum sensing has been identified in members of the Burkholderia cepacia complex, and this mini-review summarizes initial findings and discusses future perspectives... - Identification of quorum-sensing-regulated genes of Burkholderia cepaciaClaudio Aguilar
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, 34012 Trieste, Italy
J Bacteriol 185:6456-62. 2003..cepacia ATCC 25416 were identified and characterized. A total of 28 putative gene promoters show CepR-C(8)-HSL-dependent expression, suggesting that quorum sensing in B. cepacia is a global regulatory system... - The plant pathogen Erwinia amylovora produces acyl-homoserine lactone signal molecules in vitro and in plantaVittorio Venturi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
FEMS Microbiol Lett 241:179-83. 2004..Given the involvement of AHLs in plant pathogenesis, we speculate that AHL-dependent quorum sensing could play an important role in the regulation of E. amylovora virulence... - Control of rpoS transcription in Escherichia coli and Pseudomonas: why so different?Vittorio Venturi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
Mol Microbiol 49:1-9. 2003..This report will review mainly recent studies on rpoS transcriptional regulation and will try to rationalize the current knowledge into a working model... - Locality versus globality in bacterial signalling: can local communication stabilize bacterial communities?Vittorio Venturi
International Centre for Genetic Engineering and Biotechnology, 34012 Trieste, Italy
Biol Direct 5:30. 2010..Here we propose a hypothesis that the primarily local nature of intercellular signalling can be a general mechanism underlying the stability of many forms of microbial communities... - Xanthomonas oryzae pv. oryzae XKK.12 contains an AroQgamma chorismate mutase that is involved in rice virulenceGiuliano Degrassi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
Phytopathology 100:262-70. 2010..This enzyme is synthesized in planta and X. oryzae pv. oryzae knock-out mutants are hypervirulent to rice. The role of this enzyme in X. oryzae pv. oryzae rice virulence is discussed... - The plant pathogen Pseudomonas fuscovaginae contains two conserved quorum sensing systems involved in virulence and negatively regulated by RsaL and the novel regulator RsaMMaura Mattiuzzo
International Centre for Genetic Engineering and Biotechnology, Biosafety Outstation, Ca Tron, Treviso, Italy
Environ Microbiol 13:145-62. 2011..Pseudomonas fuscovaginae has therefore a unique complex regulatory network composed of at least two different repressors which directly regulate the AHL QS systems and pathogenicity... - Identification, characterization and regulation of two secreted polygalacturonases of the emerging rice pathogen Burkholderia glumaeGiuliano Degrassi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano, Trieste, Italy
FEMS Microbiol Ecol 65:251-62. 2008..glumae retained rice virulence comparable to that of the wild-type parent strain. Furthermore, the role of AHL-dependent quorum sensing and of plant cell wall degradation compounds in their regulation was investigated... - LasI/R and RhlI/R quorum sensing in a strain of Pseudomonas aeruginosa beneficial to plantsLaura Steindler
International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
Appl Environ Microbiol 75:5131-40. 2009..This is an in-depth genetic and molecular study of QS in an environmental P. aeruginosa strain and highlights several differences with QS regulation in the clinical isolate PAO1... - Role of GacA, LasI, RhlI, Ppk, PsrA, Vfr and ClpXP in the regulation of the stationary-phase sigma factor rpoS/RpoS in PseudomonasIris Bertani
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012, Trieste, Italy
Arch Microbiol 180:264-71. 2003..These results demonstrate important similarities and differences with the regulation of this sigma factor in E. coli and in Pseudomonas... - PpoR is a conserved unpaired LuxR solo of Pseudomonas putida which binds N-acyl homoserine lactonesSujatha Subramoni
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
BMC Microbiol 9:125. 2009..Moreover, AHL QS systems in P. putida strains are diverse in the type of AHLs they produce and the phenotypes that they regulate... - Oryza sativa rice plants contain molecules that activate different quorum-sensing N-acyl homoserine lactone biosensors and are sensitive to the specific AiiA lactonaseGiuliano Degrassi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano, Trieste, Italy
FEMS Microbiol Lett 269:213-20. 2007..The possible source and biological significance of this finding are discussed... - Involvement of quorum sensing and RpoS in rice seedling blight caused by Burkholderia plantariiRenando Solis
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology Area, Trieste, Italy
FEMS Microbiol Lett 259:106-12. 2006..plantarii. Both global regulatory systems are involved in causing rice seedling blight. This is the first report of gene regulators of B. plantarii implicated in the disease... - Involvement of a quorum-sensing-regulated lipase secreted by a clinical isolate of Burkholderia glumae in severe disease symptoms in riceGiulia Devescovi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, Trieste, Italy
Appl Environ Microbiol 73:4950-8. 2007..It is the first report of a clinical B. glumae isolate retaining strong rice pathogenicity and finally determined that B. glumae can undergo phenotypic conversion through a spontaneous mutation in the tofR regulator... - Commonalities and differences in regulation of N-acyl homoserine lactone quorum sensing in the beneficial plant-associated burkholderia species clusterZulma Rocío Suárez-Moreno
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34012 Trieste, Italy
Appl Environ Microbiol 76:4302-17. 2010.... - Quorum-sensing system and stationary-phase sigma factor (rpoS) of the onion pathogen Burkholderia cepacia genomovar I type strain, ATCC 25416Claudio Aguilar
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34012 Trieste, Italy
Appl Environ Microbiol 69:1739-47. 2003..cepacia has a negative effect on rpoS expression as determined by using an rpoS-lacZ transcriptional fusion; on the other hand, rpoS-null mutants displayed no difference in the accumulation of HSL signal molecules... 
The Pseudomonas putida Lon protease is involved in N-acyl homoserine lactone quorum sensing regulationIris Bertani
International Centre for Genetic Engineering and Biotechnology, Padriciano, Trieste, Italy
BMC Microbiol 7:71. 2007..putida ppuI and P. aeruginosa lasI AHL synthases. In this study we screened a transposon mutant bank of P. putida in order to identify if any other regulators were involved in negative regulation of AHL QS...- Draft genome sequence of Pseudomonas fuscovaginae, a broad-host-range pathogen of plantsHitendra Kumar Patel
International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
J Bacteriol 194:2765-6. 2012..P. fuscovaginae is now considered a broad-host-range plant pathogen causing disease in several economically important plants. We report what is, to our knowledge, the first draft genome sequence of a P. fuscovaginae strain... - The new group of non-pathogenic plant-associated nitrogen-fixing Burkholderia spp. shares a conserved quorum-sensing system, which is tightly regulated by the RsaL repressorZulma Rocí Suárez-Moreno
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
Microbiology 154:2048-59. 2008.... - Ribosomal protein S1 specifically binds to the 5' untranslated region of the Pseudomonas aeruginosa stationary-phase sigma factor rpoS mRNA in the logarithmic phase of growthMilica Sevo
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
J Bacteriol 186:4903-9. 2004..This is the first report of a protein-rpoS mRNA 5' UTR interaction in P. aeruginosa, and the possible involvement of protein S1 in translation regulation of rpoS is discussed... - LuxR-family 'solos': bachelor sensors/regulators of signalling moleculesSujatha Subramoni
International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
Microbiology 155:1377-85. 2009..Initial investigations have revealed that LuxR solos have diverse roles in bacterial interspecies and interkingdom communication... - Common features of environmental and potentially beneficial plant-associated BurkholderiaZulma Rocío Suárez-Moreno
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34149 Trieste, Italy
Microb Ecol 63:249-66. 2012..This review examines the commonalities in this growing subgroup of Burkholderia species and discusses their prospective biotechnological applications... - Plant growth-promoting Pseudomonas putida WCS358 produces and secretes four cyclic dipeptides: cross-talk with quorum sensing bacterial sensorsGiuliano Degrassi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
Curr Microbiol 45:250-4. 2002..The purification, characterization, chemical synthesis of four DKPs are reported and their possible role in cell-cell signaling is discussed... - TetR family member psrA directly binds the Pseudomonas rpoS and psrA promotersMilan Kojic
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, 34012 Trieste, Italy
J Bacteriol 184:2324-30. 2002..A model for the role of PsrA in the regulation of rpoS and psrA is presented... - Isolation, heterologous expression and characterization of an endo-polygalacturonase produced by the phytopathogen Burkholderia cepaciaClaudia Massa
International School for Advanced Studies, Trieste, Italy
Protein Expr Purif 54:300-8. 2007..PehA exhibited a pI value of 8.0 and an optimal activity at pH 3.5. Far-UV circular dichroism (CD) measurements show that PehA assumes a beta-helix fold super-secondary structural motif... - A versatile plasmid biosensor useful to identify quorum sensing LuxR-family orphans in bacterial strainsLaura Steindler
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
J Microbiol Methods 73:273-5. 2008..Using pMULTIAHLPROM, it was demonstrated that Enterobacter aerogenes possibly contains a LuxR-family orphan able to activate luxI-family promoters independently from AHLs... - The Burkholderia cepacia rpoE gene is not involved in exopolysaccharide production and onion pathogenicityGiulia Devescovi
Bateriology Group, International Centre for Genetic Engineering and Biotechnology, Italy
Can J Microbiol 52:260-5. 2006..In contrast, sigmaE contributed to the adaptation to heat stress and phosphate starvation... - Sharing of quorum-sensing signals and role of interspecies communities in a bacterial plant diseaseTaha Hosni
Dipartimento di Scienze Agrarie e Ambientali, Universita degli Studi di Perugia, Perugia, Italy
ISME J 5:1857-70. 2011..In this paper we discuss the potential role of QS in establishing a stable consortia leading to a poly-bacterial disease... - OryR is a LuxR-family protein involved in interkingdom signaling between pathogenic Xanthomonas oryzae pv. oryzae and riceSara Ferluga
Bacteriology Group, International Center for Genetic Engineering and Biotechnology, Padriciano 99, 34012 Trieste, Italy
J Bacteriol 191:890-7. 2009..Therefore, OryR has unique features and is an important regulator involved in interkingdom communication between the host and the pathogen... - Regulation of the N-acyl homoserine lactone-dependent quorum-sensing system in rhizosphere Pseudomonas putida WCS358 and cross-talk with the stationary-phase RpoS sigma factor and the global regulator GacAIris Bertani
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34012 Trieste, Italy
Appl Environ Microbiol 70:5493-502. 2004..Studies of the regulation of AHL quorum-sensing systems have lagged behind other studies and are important for understanding how these systems are integrated into the overall growth phase and metabolic status of the cells... - A proteomic study of Xanthomonas oryzae pv. oryzae in rice xylem sapJuan F Gonzalez
International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34149, Trieste, Italy
J Proteomics 75:5911-9. 2012..The usefulness of this approach in understanding the lifestyle and unraveling the virulence-associated factors of phytopathogenic vascular bacteria is discussed... - Bacterial subfamily of LuxR regulators that respond to plant compoundsSujatha Subramoni
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34149 Trieste, Italy
Appl Environ Microbiol 77:4579-88. 2011..PsoR most likely senses a molecule(s) in the plant and modulates expression of genes that have a role in biocontrol. PsoR and related proteins form a subfamily of LuxR family regulators in plant-associated bacteria... - Detection of quorum-sensing N-acyl homoserine lactone signal molecules by bacterial biosensorsLaura Steindler
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Padriciano, Trieste, Italy
FEMS Microbiol Lett 266:1-9. 2007..This article reviews and discusses the currently available bacterial biosensors which can be used in detecting and studying the different AHLs... - A LuxR homologue of Xanthomonas oryzae pv. oryzae is required for optimal rice virulenceSara Ferluga
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Padriciano 99, 34012 Trieste, Italy
Mol Plant Pathol 8:529-38. 2007..The role of OryR as a possible in planta induced LuxR family regulator is discussed... - Incoming pathogens team up with harmless 'resident' bacteriaVittorio Venturi
International Centre for Genetic Engineering and Biotechnology, Padriciano 99, 34149 Trieste, Italy
Trends Microbiol 20:160-4. 2012..This calls for serious consideration of pathogen-microbe interactions in the host with respect to disease severity and progression... - Future research trends in the major chemical language of bacteriaVittorio Venturi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, 34012 Trieste, Italy
HFSP J 3:105-16. 2009..In this essay we discuss the importance of quorum sensing via AHLs and highlight current and future trends in this important field of research... - A thermostable alpha-arabinofuranosidase from xylanolytic Bacillus pumilus: purification and characterisationGiuliano Degrassi
Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Area Science Park, Pardiciano 99, I 34012 Trieste, Italy
J Biotechnol 101:69-79. 2003..7 mM and 52.9 U mg(-1), respectively. N-terminal sequence analysis and internal peptide fragments showed homology with glycosyl hydrolases of family 51... - Pseudomonas corrugata contains a conserved N-acyl homoserine lactone quorum sensing system; its role in tomato pathogenicity and tobacco hypersensitivity responseGrazia Licciardello
Parco Scientifico e Tecnologico della Sicilia, z i Blocco Palma I, Catania, Italy
FEMS Microbiol Ecol 61:222-34. 2007..corrugata regulates traits that contribute to virulence, antimicrobial activity and fitness. This is the first report of genes of Ps. corrugata involved in the disease development and biological control activity... - Production of glycosylated thermostable Providencia rettgeri penicillin G amidase in Pichia pastorisMilica Sevo
Institute of Molecular Genetics and Genetic Engineering, Belgrade, FR Yugoslavia
FEMS Yeast Res 1:271-7. 2002..pastoris, the other parameters were very similar to those of the corresponding non-glycosylated enzymes produced in bacteria or in S. cerevisiae. The higher thermostability of this recombinant enzyme has a clear industrial advantage... - Pseudomonas aeruginosa relA contributes to virulence in Drosophila melanogasterDavid L Erickson
Department of Biological Sciences, University of Calgary, Alberta, Canada
Infect Immun 72:5638-45. 2004..These results suggest that adjustment of cellular ppGpp and pppGpp levels could be an important regulatory mechanism in P. aeruginosa adaptation in pathogenic relationships... - 5' Untranslated region of the Pseudomonas putida WCS358 stationary phase sigma factor rpoS mRNA is involved in RpoS translational regulationBranko Jovcic
Institute of Molecular Genetics and Genetic Engineering, Vojvode Stepe 444 a, PO Box 23, 11010 Belgrade, Serbia
J Microbiol 46:56-61. 2008..The results obtained herein demonstrated that the structure of UTR performs an important function in the translational regulation of the rpoS gene... - Isolation, characterization, and heterologous expression of a carboxylesterase of Pseudomonas aeruginosa PAO1Alessandro Pesaresi
International School for Advanced Studies, Alessandro Pesaresi, Via Beirut 2-4, I-34014 Trieste, Italy
Curr Microbiol 50:102-9. 2005..Homology-based database searches clearly revealed the presence of the consensus GXSXG signature motif that is present in the serine-dependent acylhydrolase protein family... - RsaL provides quorum sensing homeostasis and functions as a global regulator of gene expression in Pseudomonas aeruginosaGiordano Rampioni
Department of Biology, University Roma Tre, 00146, Rome, Italy
Mol Microbiol 66:1557-65. 2007..These investigations highlight the importance of RsaL as a global regulator of P. aeruginosa physiology that provides a counterbalance to 3OC(12)-HSL-dependent gene activation via multiple mechanisms... - Novel target genes of PsrA transcriptional regulator of Pseudomonas aeruginosaMilan Kojic
Laboratory for Molecular Genetics of Industrial Microorganisms, Institute of Molecular Genetics and Genetic Engineering, Vojvode Stepe 444a, 11010 Belgrade, Serbia and Montenegro
FEMS Microbiol Lett 246:175-81. 2005..aeruginosa PAO1 and psrA knock-out derivative was also performed resulting in the identification of 11 protein spots which were differentially regulated. These studies have indicated PsrA as a global regulator... - The quorum-sensing negative regulator RsaL of Pseudomonas aeruginosa binds to the lasI promoterGiordano Rampioni
Department of Biology, University Roma Tre, Viale G. Marconi 446, 00146, Rome, Italy
J Bacteriol 188:815-9. 2006..This is the first direct demonstration that RsaL acts as a QS negative regulator by binding to the lasI promoter... - The Pseudomonas quorum-sensing regulator RsaL belongs to the tetrahelical superclass of H-T-H proteinsGiordano Rampioni
Department of Biology, University Roma Tre, Viale Marconi, 446, 00146, Rome, Italy
J Bacteriol 189:1922-30. 2007..Finally, the minimum DNA sequence required for RsaL binding on the lasI promoter was determined, and our data support the hypothesis that RsaL binds DNA as a dimer...