2021
RNA chaperone activates Salmonella virulence program during infection
Choi J, Salvail H, Groisman EA. RNA chaperone activates Salmonella virulence program during infection. Nucleic Acids Research 2021, 49: 11614-11628. PMID: 34751407, PMCID: PMC8599858, DOI: 10.1093/nar/gkab992.Peer-Reviewed Original ResearchConceptsPhoP activationVirulence regulator PhoPWild-type virulenceBacterium Salmonella enterica serovar TyphimuriumWild-type S. typhimuriumSalmonella enterica serovar TyphimuriumRNA chaperonesEnterica serovar TyphimuriumRegulator PhoPRedundant proteinsMutant behavesVirulence programVirulence roleS. typhimuriumInside macrophagesSecondary structureSerovar TyphimuriumCritical functionsVirulence genesChaperonesPhoPMutantsRibosomesOrganismsCSPC
2020
How Pathogens Feel and Overcome Magnesium Limitation When in Host Tissues
Blanc-Potard AB, Groisman EA. How Pathogens Feel and Overcome Magnesium Limitation When in Host Tissues. Trends In Microbiology 2020, 29: 98-106. PMID: 32807623, PMCID: PMC7855738, DOI: 10.1016/j.tim.2020.07.003.Peer-Reviewed Original ResearchConceptsNutritional immunityHost cell compartmentsAbundant divalent cationHost tissuesSalmonella enterica serovar TyphimuriumAvailability of nutrientsPathogen responseEnterica serovar TyphimuriumMacrophage proteinHost organismLiving cellsMagnesium limitationAmino acidsIntracellular pathogensSerovar TyphimuriumNutrient concentrationsCell compartmentPathogensDivalent cationsNutrientsMagnesium deprivationEssentialityOrganismsCytoplasmProteinSmall proteins regulate Salmonella survival inside macrophages by controlling degradation of a magnesium transporter
Yeom J, Shao Y, Groisman EA. Small proteins regulate Salmonella survival inside macrophages by controlling degradation of a magnesium transporter. Proceedings Of The National Academy Of Sciences Of The United States Of America 2020, 117: 20235-20243. PMID: 32753384, PMCID: PMC7443967, DOI: 10.1073/pnas.2006116117.Peer-Reviewed Original ResearchConceptsSmall proteinsAmino acid identityFacultative intracellular pathogenTransporter MgtAProtease FtsHMagnesium transportersAcid identityMacrophage proteinRelated transportersSame transcriptPathogen survivalMgtBIntracellular pathogensSerovar TyphimuriumProteinLimitation conditionsHost tissuesMgtROxidative stressTransportersSalmonella survivalSingular exampleFtsHMacrophagesMgtASalmonella expresses foreign genes during infection by degrading their silencer
Choi J, Groisman EA. Salmonella expresses foreign genes during infection by degrading their silencer. Proceedings Of The National Academy Of Sciences Of The United States Of America 2020, 117: 8074-8082. PMID: 32209674, PMCID: PMC7149492, DOI: 10.1073/pnas.1912808117.Peer-Reviewed Original ResearchConceptsForeign genesH-NSForeign DNAHeat-stable nucleoid-structuring (H-NS) proteinH-NS bindingNucleoid structuring proteinGram-negative bacterial speciesFacultative intracellular pathogenPhoP proteinLon proteaseProtease LonRegulatory sequencesVirulence regulatorGene silencingIntramacrophage survivalStructuring proteinBacterial speciesGenesInside macrophagesIntracellular pathogensSerovar TyphimuriumUncovered mechanismProteinVirulence genesDNA
2018
A protein that controls the onset of a Salmonella virulence program
Yeom J, Pontes MH, Choi J, Groisman EA. A protein that controls the onset of a Salmonella virulence program. The EMBO Journal 2018, 37 PMID: 29858228, PMCID: PMC6043847, DOI: 10.15252/embj.201796977.Peer-Reviewed Original ResearchConceptsVirulence programBacterial inner membraneMaster virulence regulatorC-terminal domainHost tissuesAnti-virulence factorMgtC proteinInner membraneGenetic programVirulence regulatorConstitutive promoterGene transcriptionIntramacrophage survivalSame mRNAAntibiotic toleranceATP synthesisPathogen survivalGenesMetabolic adaptationCytoplasmic pHSerovar TyphimuriumPathogen persistenceVirulence genesProteinMechanism of action
2015
Salmonella promotes virulence by repressing cellulose production
Pontes MH, Lee EJ, Choi J, Groisman EA. Salmonella promotes virulence by repressing cellulose production. Proceedings Of The National Academy Of Sciences Of The United States Of America 2015, 112: 5183-5188. PMID: 25848006, PMCID: PMC4413311, DOI: 10.1073/pnas.1500989112.Peer-Reviewed Original ResearchConceptsCellulose synthesisWild-type phenotypeWild-type virulenceSalmonella enterica serovar TyphimuriumCyclic diguanylateEnterica serovar TyphimuriumPathogen fitnessAbundant organic polymerMgtC geneAcute virulenceAllosteric activatorAbiotic surfacesMgtC mutantInside macrophagesMutantsVirulence determinantsSerovar TyphimuriumVirulenceCellulose productionEnvironmental insultsCellulose levelsBCSAAttenuated mutantsTraitsDiguanylate
2013
A Bacterial Virulence Protein Promotes Pathogenicity by Inhibiting the Bacterium’s Own F1Fo ATP Synthase
Lee EJ, Pontes MH, Groisman EA. A Bacterial Virulence Protein Promotes Pathogenicity by Inhibiting the Bacterium’s Own F1Fo ATP Synthase. Cell 2013, 154: 146-156. PMID: 23827679, PMCID: PMC3736803, DOI: 10.1016/j.cell.2013.06.004.Peer-Reviewed Original ResearchThe lipopolysaccharide modification regulator PmrA limits Salmonella virulence by repressing the type three-secretion system Spi/Ssa
Choi J, Groisman EA. The lipopolysaccharide modification regulator PmrA limits Salmonella virulence by repressing the type three-secretion system Spi/Ssa. Proceedings Of The National Academy Of Sciences Of The United States Of America 2013, 110: 9499-9504. PMID: 23690578, PMCID: PMC3677452, DOI: 10.1073/pnas.1303420110.Peer-Reviewed Original ResearchConceptsPmrA proteinNull mutantsSalmonella virulenceThree secretion systemVirulence regulatory genesSalmonella enterica serovar TyphimuriumWild-type SalmonellaEnterica serovar TyphimuriumPmrA mutantRegulatory genesProtein bindsModification genesMurine typhoid feverControl expressionLPS modificationsPmrA geneMutantsGenesSerovar TyphimuriumPathogen persistenceAntimicrobial peptidesHost tissuesPromoterVirulenceProtein
2012
Expression of STM4467-Encoded Arginine Deiminase Controlled by the STM4463 Regulator Contributes to Salmonella enterica Serovar Typhimurium Virulence
Choi Y, Choi J, Groisman EA, Kang DH, Shin D, Ryu S. Expression of STM4467-Encoded Arginine Deiminase Controlled by the STM4463 Regulator Contributes to Salmonella enterica Serovar Typhimurium Virulence. Infection And Immunity 2012, 80: 4291-4297. PMID: 23006851, PMCID: PMC3497419, DOI: 10.1128/iai.00880-12.Peer-Reviewed Original ResearchConceptsCarbamate kinaseOrnithine transcarbamoylaseArginine deiminaseSalmonella enterica Serovar Typhimurium VirulenceBacterium Salmonella enterica serovar TyphimuriumSalmonella enterica serovar TyphimuriumGene functionEnterica serovar TyphimuriumDeletion mutantsMammalian hostsPathway genesRegulatory proteinsADI systemSuccessful infectionTyphimurium virulenceS. typhimuriumMetabolic functionsGenesSerovar TyphimuriumADI activityMurine macrophagesVirulenceMutantsCertain pathogensExpressionControl of a Salmonella virulence locus by an ATP-sensing leader messenger RNA
Lee EJ, Groisman EA. Control of a Salmonella virulence locus by an ATP-sensing leader messenger RNA. Nature 2012, 486: 271-275. PMID: 22699622, PMCID: PMC3711680, DOI: 10.1038/nature11090.Peer-Reviewed Original ResearchMeSH Keywords5' Untranslated RegionsAdenosine TriphosphateAnimalsBacterial ProteinsBase SequenceCation Transport ProteinsFemaleGene Expression Regulation, BacterialHydrogen-Ion ConcentrationMacrophagesMiceMice, Inbred C3HMolecular Sequence DataMutationSalmonella InfectionsSalmonella typhimuriumSequence AlignmentVirulence
2005
The PhoP/PhoQ system controls the intramacrophage type three secretion system of Salmonella enterica
Bijlsma JJ, Groisman EA. The PhoP/PhoQ system controls the intramacrophage type three secretion system of Salmonella enterica. Molecular Microbiology 2005, 57: 85-96. PMID: 15948951, DOI: 10.1111/j.1365-2958.2005.04668.x.Peer-Reviewed Original ResearchConceptsSPI-2 pathogenicity islandPhoP/PhoQ systemType three secretion systemThree secretion systemPhoP proteinSecretion systemSsa genesPathogenicity islandTwo-component regulatory systemResponse regulator SsrBPhoP/PhoQRegulatory systemTwo-component systemSalmonella entericaEukaryotic cellsChromatin immunoprecipitationCentral roleDifferent regulatory systemsSalmonella virulenceUntranslated regionDistinct signalsPhoPGenesEffectorsProtein
2004
Activation of the RcsC/YojN/RcsB phosphorelay system attenuates Salmonella virulence
Mouslim C, Delgado M, Groisman EA. Activation of the RcsC/YojN/RcsB phosphorelay system attenuates Salmonella virulence. Molecular Microbiology 2004, 54: 386-395. PMID: 15469511, DOI: 10.1111/j.1365-2958.2004.04293.x.Peer-Reviewed Original ResearchConceptsConstitutive mutantsSalmonella virulenceNon-phagocytic cellsPhosphorelay systemWild-type SalmonellaExpression of productsVirulence functionsFull virulenceSensor geneCps operonRcsBConstitutive activationSuccessful infectionVirulence attenuationGenesVirulence factorsAberrant expressionBacterial pathogensVirulenceMutantsHost tissuesExpressionLocation-dependent mannerMutationsAttenuation phenotypeInvolvement of Salmonella Pathogenicity Island 2 in the Up-Regulation of Interleukin-10 Expression in Macrophages: Role of Protein Kinase A Signal Pathway
Uchiya K, Groisman EA, Nikai T. Involvement of Salmonella Pathogenicity Island 2 in the Up-Regulation of Interleukin-10 Expression in Macrophages: Role of Protein Kinase A Signal Pathway. Infection And Immunity 2004, 72: 1964-1973. PMID: 15039316, PMCID: PMC375175, DOI: 10.1128/iai.72.4.1964-1973.2004.Peer-Reviewed Original ResearchConceptsSalmonella pathogenicity island 2Pathogenicity island 2Wild-type SalmonellaCyclic AMP response element binding proteinPKA activityProtein kinase A (PKA) signal pathwaySPI-2Island 2Signal transduction pathwaysProtein kinase A (PKA) inhibitor HResponse element-binding proteinA (PKA) inhibitor HElement-binding proteinFacultative intracellular bacteriaAMP response element binding proteinTransduction pathwaysSpiC genePKA activationSpiC mutantIntracellular bacteriaInhibitor HSignal pathwayCREB phosphorylationUp-RegulationPhosphorylation
2003
The Salmonella SpiC protein targets the mammalian Hook3 protein function to alter cellular trafficking
Shotland Y, Krämer H, Groisman EA. The Salmonella SpiC protein targets the mammalian Hook3 protein function to alter cellular trafficking. Molecular Microbiology 2003, 49: 1565-1576. PMID: 12950921, DOI: 10.1046/j.1365-2958.2003.03668.x.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBacterial ProteinsCell LineCyclic AMPGenes, ReporterLysosomesMacrophagesMiceMicroscopy, FluorescenceMicrotubule-Associated ProteinsMolecular Sequence DataPhagosomesProtein BindingProtein TransportRecombinant Fusion ProteinsSalmonella typhimuriumSequence Homology, Amino AcidConceptsPhagosome-lysosome fusionCellular traffickingType III secretion systemEndosome-endosome fusionDominant negative mutantCytosol of macrophagesMammalian proteinsPhenotype of cellsProtein functionGolgi morphologySecretion systemDistribution of lysosomesSpiC genePhagosomal membraneProteinMurine macrophagesTraffickingCytosolVero cellsMacrophagesCellsMutantsHook3FusionGenesControl of the Salmonella ugd gene by three two‐component regulatory systems
Mouslim C, Groisman EA. Control of the Salmonella ugd gene by three two‐component regulatory systems. Molecular Microbiology 2003, 47: 335-344. PMID: 12519186, DOI: 10.1046/j.1365-2958.2003.03318.x.Peer-Reviewed Original Research
2000
The regulatory protein PhoP controls susceptibility to the host inflammatory response in Shigella flexneri
Moss J, Fisher P, Vick B, Groisman E, Zychlinsky A. The regulatory protein PhoP controls susceptibility to the host inflammatory response in Shigella flexneri. Cellular Microbiology 2000, 2: 443-452. PMID: 11207599, DOI: 10.1046/j.1462-5822.2000.00065.x.Peer-Reviewed Original ResearchConceptsWild-type strainPhoP mutantPhoP/PhoQ systemTwo-component regulatory systemRegulatory protein PhoPHost cell phagosomesPhoP/PhoQKey virulence genesMutant bacteriaEnteric bacteriumPathogen escapeCell phagosomesHost cellsMutantsWild-type ShigellaPolymorphonuclear leucocytesRegulatory systemVirulence genesAntimicrobial moleculesAntimicrobial peptidesPhoPExtreme acidInflammatory responseEpithelial cellsPhagosomesA parallel intraphagosomal survival strategy shared by Mycobacterium tuberculosis and Salmonella enterica
Buchmeier N, Blanc‐Potard A, Ehrt S, Piddington D, Riley L, Groisman E. A parallel intraphagosomal survival strategy shared by Mycobacterium tuberculosis and Salmonella enterica. Molecular Microbiology 2000, 35: 1375-1382. PMID: 10760138, DOI: 10.1046/j.1365-2958.2000.01797.x.Peer-Reviewed Original ResearchConceptsM. tuberculosisIntracellular pathogensMycobacterium tuberculosisSpleens of miceCultured human macrophagesM. tuberculosis mutantsMgtC mutantMacrophage phagosomesTuberculosisSalmonella entericaHuman macrophagesTuberculosis mutantsMacrophagesDifferent diseasesLow magnesiumVirulencePhagosomesMgtC proteinSimilar phenotypeSalmonellaPrevious studiesPathogensLungSpleen
1999
A Salmonella virulence protein that inhibits cellular trafficking
Uchiya K, Barbieri M, Funato K, Shah A, Stahl P, Groisman E. A Salmonella virulence protein that inhibits cellular trafficking. The EMBO Journal 1999, 18: 3924-3933. PMID: 10406797, PMCID: PMC1171468, DOI: 10.1093/emboj/18.14.3924.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsBacterial ProteinsBiological TransportCell LineCell SurvivalCytosolEndosomesGenes, BacterialGTP-Binding ProteinsInhibitory Concentration 50Lethal Dose 50LysosomesMacrophagesMembrane FusionMiceMolecular Sequence DataMutationPhagosomesRab5 GTP-Binding ProteinsReceptors, TransferrinSalmonella entericaVirulenceConceptsType III secretion systemSecretion systemIntracellular traffickingSPI-2 pathogenicity islandTrafficking of vesiclesEndosome-endosome fusionHost cell cytosolVirulence proteinsCellular traffickingNormal traffickingSpiC geneCell cytosolPathogenicity islandSalmonella pathogenesisSpiC mutantTraffickingProteinInhibited fusionSindbis virusSalmonella entericaTransferrin receptorJ774 macrophagesMutantsEndosomesGenes
1997
A green light for virulence gene expression
Groisman E. A green light for virulence gene expression. Nature Medicine 1997, 3: 1190-1191. PMID: 9359685, DOI: 10.1038/nm1197-1190.Peer-Reviewed Original ResearchThe Salmonella selC locus contains a pathogenicity island mediating intramacrophage survival
Blanc‐Potard A, Groisman E. The Salmonella selC locus contains a pathogenicity island mediating intramacrophage survival. The EMBO Journal 1997, 16: 5376-5385. PMID: 9311997, PMCID: PMC1170169, DOI: 10.1093/emboj/16.17.5376.Peer-Reviewed Original ResearchMeSH KeywordsAdenosine TriphosphatasesAnimalsBacterial ProteinsBase SequenceCarrier ProteinsCation Transport ProteinsCulture MediaEscherichia coliEscherichia coli ProteinsFemaleGenes, BacterialMacrophagesMagnesiumMembrane Transport ProteinsMiceMice, Inbred BALB CMolecular Sequence DataMultigene FamilyMutationOperonPhenotypeRecombination, GeneticRNA, TransferSalmonella Infections, AnimalSalmonella typhimuriumConceptsPathogenicity islandSelC locusIntramacrophage survivalSalmonella typhimurium chromosomePhoP/PhoQKb DNA segmentVirulence genesNon-pathogenic bacterial speciesTwo-component systemSite of integrationChromosomal clustersTRNA locusVirulence functionsDNA segmentsSalmonella virulenceHomologous regionsMajor regulatorBacterial speciesLociEnteric bacteriaEscherichia coliGenesBenign strainsLow Mg2Virulence