2020
Horizontally acquired regulatory gene activates ancestral regulatory system to promote Salmonella virulence
Choi J, Groisman EA. Horizontally acquired regulatory gene activates ancestral regulatory system to promote Salmonella virulence. Nucleic Acids Research 2020, 48: 10832-10847. PMID: 33045730, PMCID: PMC7641745, DOI: 10.1093/nar/gkaa813.Peer-Reviewed Original ResearchConceptsPhoP/PhoQAncestral regulatorNucleoid structuring protein H-NSProtein H-NSS. bongoriSalmonella enterica serovar TyphimuriumAncestral genomesH-NSTarget promotersEnterica serovar TyphimuriumRegulatory genesBacterial virulenceSalmonella virulencePromoter regionSsrBOpposite regulationGenesS. typhimuriumPhoQRegulatory systemSerovar TyphimuriumVirulenceTranscriptionPromoterRegulatorSalmonella 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: embj201796977. 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
2017
Activation of master virulence regulator PhoP in acidic pH requires the Salmonella-specific protein UgtL
Choi J, Groisman EA. Activation of master virulence regulator PhoP in acidic pH requires the Salmonella-specific protein UgtL. Science Signaling 2017, 10 PMID: 28851823, PMCID: PMC5966036, DOI: 10.1126/scisignal.aan6284.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntimicrobial Cationic PeptidesBacterial ProteinsDisease Models, AnimalFemaleGene Expression Regulation, BacterialHydrogen-Ion ConcentrationMagnesiumMembrane ProteinsMiceMice, Inbred BALB CPeptidesPhosphorylationSalmonella InfectionsSalmonella typhimuriumSignal TransductionVirulenceConceptsPhoP activation
2016
Acidic pH sensing in the bacterial cytoplasm is required for Salmonella virulence
Choi J, Groisman EA. Acidic pH sensing in the bacterial cytoplasm is required for Salmonella virulence. Molecular Microbiology 2016, 101: 1024-1038. PMID: 27282333, PMCID: PMC5015592, DOI: 10.1111/mmi.13439.Peer-Reviewed Original Research
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