2022
Typhoid toxin sorting and exocytic transport from Salmonella Typhi-infected cells
Chang SJ, Hsu YT, Chen Y, Lin YY, Lara-Tejero M, Galan JE. Typhoid toxin sorting and exocytic transport from Salmonella Typhi-infected cells. ELife 2022, 11: e78561. PMID: 35579416, PMCID: PMC9142146, DOI: 10.7554/elife.78561.Peer-Reviewed Original ResearchConceptsCellular machineryType III protein secretion systemSpecific cellular machineryVesicle carriersProtein secretion systemExtracellular spaceTyphoid toxinEssential virulence factorExocytic transportGTPase Sar1Syntaxin 4Unusual biologySecretion systemPlasma membraneIntracellular transportRemarkable adaptationSpecific effectorsHost cellsIntracellular pathogensVirulence factorsMachineryCooptionVacuolesToxinSpecific environment
2019
The Injectisome, a Complex Nanomachine for Protein Injection into Mammalian Cells
Lara-tejero M, Galán J. The Injectisome, a Complex Nanomachine for Protein Injection into Mammalian Cells. 2019, 245-259. DOI: 10.1128/9781683670285.ch20.Peer-Reviewed Original ResearchSecretion machineType III protein secretion systemType III secretion machinesProtein secretion systemTarget eukaryotic cellsCell biological processesType III systemMultiprotein nanomachineEukaryotic hostsComplex nanomachinesGram-negative bacteriaPlant pathogensSymbiotic interactionsEukaryotic cellsEffector proteinsSecretion systemMammalian cellsImportant humanBiological processesStructural organizationInjectisomeBacteriaCurrent knowledgeCentral rolePrimary function
2008
Modulation of the actin cytoskeleton by Salmonella
Galan J. Modulation of the actin cytoskeleton by Salmonella. The FASEB Journal 2008, 22: 530.1-530.1. DOI: 10.1096/fasebj.22.1_supplement.530.1.Peer-Reviewed Original ResearchEffector proteinsHost cellsActin cytoskeletonBacterial proteinsCellular responsesBacterial effector proteinsProtein secretion systemSpecialized protein secretion systemActin cytoskeletal reorganizationDownstream effector proteinsSignal transduction pathwaysProtein Cdc42Exchange factorMembrane rufflingSmall GTPRho GTPasesSecretion systemCytoskeletal reorganizationTransduction pathwaysCytoskeletal rearrangementsCdc42RhoG.ProteinCytoskeletonRac
2003
A Salmonella protein causes macrophage cell death by inducing autophagy
Hernandez LD, Pypaert M, Flavell RA, Galán J. A Salmonella protein causes macrophage cell death by inducing autophagy. Journal Of Cell Biology 2003, 163: 1123-1131. PMID: 14662750, PMCID: PMC2173598, DOI: 10.1083/jcb.200309161.Peer-Reviewed Original ResearchConceptsMembrane fusion activityCell deathType III protein secretion systemFusion activityProtein secretion systemMacrophage cell deathEndoplasmic reticulum markerSalmonella-infected macrophagesSecretion systemSalmonella proteinsAutophagic vesiclesMutant formsSipBHost cellsCultured cellsMitochondriaMembrane structureSalmonella entericaProteinCausative agentMarked accumulationMacrophagesCellsAutophagosomesAutophagy
2001
Maintenance of an unfolded polypeptide by a cognate chaperone in bacterial type III secretion
Stebbins C, Galán J. Maintenance of an unfolded polypeptide by a cognate chaperone in bacterial type III secretion. Nature 2001, 414: 77-81. PMID: 11689946, DOI: 10.1038/35102073.Peer-Reviewed Original ResearchConceptsEffector proteinsSecretion systemType III protein secretion systemBacterial type III secretionSpecific cytosolic chaperonesSuch effector proteinsType III secretion systemSecretion-competent stateVirulence effector proteinsProtein secretion systemChaperone-binding domainHost cell cytosolType III secretionType III apparatusCytosolic chaperonesUnfolded polypeptidesSecretion machineryCognate chaperoneÅ resolutionChaperonesCell cytosolChaperone moleculesEffective translocationBacterial pathogensHydrophobic interfaceCharacterization of the mutS-proximal region of the Salmonella typhimurium SPI-1 identifies a group of pathogenicity island-associated genes
Pancetti A, Galán J. Characterization of the mutS-proximal region of the Salmonella typhimurium SPI-1 identifies a group of pathogenicity island-associated genes. FEMS Microbiology Letters 2001, 197: 203-208. PMID: 11313135, DOI: 10.1111/j.1574-6968.2001.tb10604.x.Peer-Reviewed Original ResearchConceptsPathogenicity islandSecretion systemType III protein secretion systemSPI-1Type III secretion systemHigher eukaryotic hostsProtein secretion systemSet of genesIron uptake systemExpression of genesSegment of DNAPotential pathogenicity islandsEukaryotic hostsFhlA geneGene blockCentisome 63Pig genesFunctional copyTranscription factorsSalmonella chromosomeUnknown functionUptake systemGenesBacterial pathogensHomologA Salmonella inositol polyphosphatase acts in conjunction with other bacterial effectors to promote host cell actin cytoskeleton rearrangements and bacterial internalization
Zhou D, Chen L, Hernandez L, Shears S, Galán J. A Salmonella inositol polyphosphatase acts in conjunction with other bacterial effectors to promote host cell actin cytoskeleton rearrangements and bacterial internalization. Molecular Microbiology 2001, 39: 248-260. PMID: 11136447, DOI: 10.1046/j.1365-2958.2001.02230.x.Peer-Reviewed Original ResearchMeSH KeywordsActinsAnimalsBacterial ProteinsCdc42 GTP-Binding ProteinCell MembraneCells, CulturedChlorocebus aethiopsCOS CellsCytoskeletonHumansInositol PhosphatesIntestinesJNK Mitogen-Activated Protein KinasesMAP Kinase Kinase 4Mitogen-Activated Protein Kinase KinasesPhosphoric Monoester HydrolasesPhosphorylationSalmonella InfectionsSalmonella typhimuriumTransfectionConceptsActin cytoskeleton rearrangementCytoskeleton rearrangementBacterial entrySecretion systemBacterial internalizationCellular responsesHost cellsRho GTPases signalingProtein secretion systemHost cell actin cytoskeleton rearrangementsHost cellular functionsSpecialized protein secretion systemCdc42-dependent mannerNon-phagocytic cellsBacterial effectorsAbility of SalmonellaInositol phosphataseCellular functionsDefective mutantsBacterial proteinsCo-ordinated functionSalmonella pathogenicityBacterium's abilitySopBPhospholipase C.
2000
Modulation of Host Signaling by a Bacterial Mimic Structure of the Salmonella Effector SptP Bound to Rac1
Stebbins C, Galán J. Modulation of Host Signaling by a Bacterial Mimic Structure of the Salmonella Effector SptP Bound to Rac1. Molecular Cell 2000, 6: 1449-1460. PMID: 11163217, DOI: 10.1016/s1097-2765(00)00141-6.Peer-Reviewed Original ResearchMeSH KeywordsAluminum CompoundsAmino Acid SequenceAmino Acid SubstitutionBacterial ProteinsBinding SitesCdc42 GTP-Binding ProteinCrystallography, X-RayDimerizationEvolution, MolecularFluoridesGTPase-Activating ProteinsGuanosine DiphosphateMacromolecular SubstancesModels, MolecularMolecular Sequence DataMutationProtein BindingProtein Structure, SecondaryProtein Structure, TertiaryProtein Tyrosine PhosphatasesRac1 GTP-Binding ProteinRecombinant Fusion ProteinsSalmonella typhimuriumSequence AlignmentSignal TransductionMolecular characterization and assembly of the needle complex of the Salmonella typhimurium type III protein secretion system
Kubori T, Sukhan A, Aizawa S, Galán J. Molecular characterization and assembly of the needle complex of the Salmonella typhimurium type III protein secretion system. Proceedings Of The National Academy Of Sciences Of The United States Of America 2000, 97: 10225-10230. PMID: 10944190, PMCID: PMC27824, DOI: 10.1073/pnas.170128997.Peer-Reviewed Original ResearchConceptsType III secretion systemProtein secretion systemSecretion systemNeedle complexType III protein secretion systemHost cellular functionsSpecialized protein secretion systemType III secretion export apparatusType III secretionPathogenicity island 1Secretion complexPathogen's benefitExport apparatusCellular functionsAnimal cellsNeedle-like projectionsBacterial proteinsBacterium's abilityNeedle substructureIsland 1Host cellsMolecular characterizationNonphagocytic cellsNeedle componentBacterial pathogensThe Flagellar Sigma Factor FliA (ς28) Regulates the Expression of Salmonella Genes Associated with the Centisome 63 Type III Secretion System
Eichelberg K, Galán J. The Flagellar Sigma Factor FliA (ς28) Regulates the Expression of Salmonella Genes Associated with the Centisome 63 Type III Secretion System. Infection And Immunity 2000, 68: 2735-2743. PMID: 10768967, PMCID: PMC97482, DOI: 10.1128/iai.68.5.2735-2743.2000.Peer-Reviewed Original ResearchConceptsType III secretion systemSecretion systemExpression of componentsRegulatory proteinsType III protein secretion systemRegulatory mechanismsSerovar TyphimuriumFlagellar sigma factor FliASigma factor FliAProtein secretion systemTranscriptional regulatory proteinsSalmonella pathogenicity island 1Complex regulatory mechanismsFlagellar regulatory genesPathogenicity island 1Macrophage cell deathEffects of mutationsType III systemCultured epithelial cellsFlagellar genesEnterica serovar TyphimuriumMild centrifugal forceRegulatory genesSalmonella genesS. enterica serovar Typhimurium
1999
A Salmonella protein antagonizes Rac-1 and Cdc42 to mediate host-cell recovery after bacterial invasion
Fu Y, Galán J. A Salmonella protein antagonizes Rac-1 and Cdc42 to mediate host-cell recovery after bacterial invasion. Nature 1999, 401: 293-297. PMID: 10499590, DOI: 10.1038/45829.Peer-Reviewed Original ResearchMeSH KeywordsActinsArginineBacterial AdhesionBacterial ProteinsCdc42 GTP-Binding Protein, Saccharomyces cerevisiaeCell Cycle ProteinsCell MembraneEscherichia coliGTPase-Activating ProteinsGTP-Binding ProteinsHumansJNK Mitogen-Activated Protein KinasesMAP Kinase Kinase 4Mitogen-Activated Protein Kinase KinasesMutationProtein KinasesProtein Tyrosine PhosphatasesProteinsRecombinant Fusion ProteinsSalmonella typhimuriumConceptsHost cell cytosolActin cytoskeletonType III secretion systemProtein secretion systemSpecialized protein secretion systemActin cytoskeleton reorganizationCell actin cytoskeletonActin cytoskeletal changesRho GTPase proteinsRac-1Bacterial effectorsEffector proteinsExchange factorGTPase proteinsSecretion systemSalmonella proteinsCytoskeletal changesCellular responsesCdc42ProteinInfected cellsBacterial invasionCytosolBacteriumSPTPDifferential Regulation of Salmonella typhimurium Type III Secreted Proteins by Pathogenicity Island 1 (SPI-1)-Encoded Transcriptional Activators InvF and HilA
Eichelberg K, Galán J. Differential Regulation of Salmonella typhimurium Type III Secreted Proteins by Pathogenicity Island 1 (SPI-1)-Encoded Transcriptional Activators InvF and HilA. Infection And Immunity 1999, 67: 4099-4105. PMID: 10417179, PMCID: PMC96710, DOI: 10.1128/iai.67.8.4099-4105.1999.Peer-Reviewed Original ResearchConceptsExpression of componentsSPI-1Secretion systemRegulatory proteinsType III protein secretion systemType III secretion machineryCellular responsesHost cellsFunction mutationsType III secretion systemInvasion-associated type III secretion systemProtein secretion systemTranscriptional regulatory proteinsComplex regulatory mechanismsPathogenicity island 1Secretion machineryCentisome 63Different genesRegulatory mechanismsMutant strainPathogenicity islandInvFIsland 1Differential regulationProteinCharacterization of SprA, an AraC‐like transcriptional regulator encoded within the Salmonella typhimurium pathogenicity island 1
Eichelberg K, Hardt W, Galán J. Characterization of SprA, an AraC‐like transcriptional regulator encoded within the Salmonella typhimurium pathogenicity island 1. Molecular Microbiology 1999, 33: 139-152. PMID: 10411731, DOI: 10.1046/j.1365-2958.1999.01458.x.Peer-Reviewed Original ResearchMeSH KeywordsAmino Acid SequenceAnimalsAraC Transcription FactorBacterial ProteinsBiological TransportCells, CulturedChromosome MappingChromosomes, BacterialConsensus SequenceDNA-Binding ProteinsEpithelial CellsGene Expression Regulation, BacterialGenes, BacterialGenes, ReporterHelix-Loop-Helix MotifsMolecular Sequence DataMultigene FamilyPhylogenyRecombinant Fusion ProteinsRepressor ProteinsSalmonella typhimuriumSequence AlignmentSequence Homology, Amino AcidSignal TransductionTrans-ActivatorsTranscription FactorsTranscription, GeneticVirulenceConceptsType III secretion systemTranscriptional regulatory proteinsPathogenicity island 1Secretion systemRegulatory proteinsType III protein secretion systemSPI-1Island 1Host cellsProtein secretion systemTranscriptional regulatory cascadeSpecific transcriptional regulatory proteinsAdditional regulatory proteinsSignificant sequence similarityAraC-like transcriptional regulatorActin cytoskeletal rearrangementRegulation of expressionInvasion-associated genesExpression of genesNon-phagocytic cellsCentisome 63Effector proteinsTranscriptional regulatorsRegulatory cascadeSequence similarityType III Secretion Machines: Bacterial Devices for Protein Delivery into Host Cells
Galán J, Collmer A. Type III Secretion Machines: Bacterial Devices for Protein Delivery into Host Cells. Science 1999, 284: 1322-1328. PMID: 10334981, DOI: 10.1126/science.284.5418.1322.Peer-Reviewed Original ResearchConceptsSecretion systemComplex protein secretion systemsHost cellsType III secretion systemBacterial effector proteinsProtein secretion systemAnimal pathogenic bacteriaHost cellular functionsGram-negative pathogenic bacteriaBacterial devicesPathogenic bacteriaEffector proteinsCellular functionsFlagellar apparatusBacterial speciesEffector moleculesProtein deliveryBacteriaCellsNovel preventionBiologySpeciesPlantsProteinTherapeutic approaches
1998
Identification of a Specific Chaperone for SptP, a Substrate of the Centisome 63 Type III Secretion System ofSalmonella typhimurium
Fu Y, Galán J. Identification of a Specific Chaperone for SptP, a Substrate of the Centisome 63 Type III Secretion System ofSalmonella typhimurium. Journal Of Bacteriology 1998, 180: 3393-3399. PMID: 9642193, PMCID: PMC107295, DOI: 10.1128/jb.180.13.3393-3399.1998.Peer-Reviewed Original ResearchMeSH KeywordsActinsAmino Acid SequenceBacterial ProteinsBase SequenceChromosomes, BacterialCloning, MolecularComplement Inactivator ProteinsCytoskeletonKineticsMolecular Sequence DataPlasmidsPolymerase Chain ReactionProtein Tyrosine PhosphatasesRecombinant Fusion ProteinsSalmonella typhimuriumSequence AlignmentSequence Homology, Amino AcidConceptsType III secretion systemSecretion systemSpecific chaperonesActin cytoskeletonTyrosine phosphataseType III protein secretion systemHost cell actin cytoskeletonHost cellsProtein secretion systemCell actin cytoskeletonHost cell responsesPulse-chase experimentsCytoplasmic chaperonesCentisome 63Effector proteinsTranscription factorsAcidic polypeptidesChaperonesResidues 15Function mutationsEffector moleculesCytoskeletonProteinSPTPSalmonella typhimuriumS. typhimurium Encodes an Activator of Rho GTPases that Induces Membrane Ruffling and Nuclear Responses in Host Cells
Hardt W, Chen L, Schuebel K, Bustelo X, Galán J. S. typhimurium Encodes an Activator of Rho GTPases that Induces Membrane Ruffling and Nuclear Responses in Host Cells. Cell 1998, 93: 815-826. PMID: 9630225, DOI: 10.1016/s0092-8674(00)81442-7.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBacterial ProteinsCalcium-Calmodulin-Dependent Protein KinasesCdc42 GTP-Binding ProteinCell Cycle ProteinsCell MembraneCell NucleusCOS CellsCytoskeletonEnzyme ActivationGTP PhosphohydrolasesGTPase-Activating ProteinsGTP-Binding ProteinsGuanosine DiphosphateGuanosine TriphosphateHeLa CellsHumansJNK Mitogen-Activated Protein KinasesMitogen-Activated Protein KinasesProteinsSalmonella typhimuriumSignal TransductionConceptsHost cellsMembrane rufflingSecretion systemGDP/GTP nucleotide exchangeProtein secretion systemActivator of RhoCDNA library screenActin cytoskeleton rearrangementRac-1Rho GTPasesCytoskeletal reorganizationCytoskeleton rearrangementBacterial proteinsNucleotide exchangeLibrary screenJNK activationCellular responsesNuclear responseCdc42Pathogen inducesSopERufflingMicrobial stimulationProteinCellsSupramolecular Structure of the Salmonella typhimurium Type III Protein Secretion System
Kubori T, Matsushima Y, Nakamura D, Uralil J, Lara-Tejero M, Sukhan A, Galán J, Aizawa S. Supramolecular Structure of the Salmonella typhimurium Type III Protein Secretion System. Science 1998, 280: 602-605. PMID: 9554854, DOI: 10.1126/science.280.5363.602.Peer-Reviewed Original ResearchA substrate of the centisome 63 type III protein secretion system of Salmonella typhimurium is encoded by a cryptic bacteriophage
Hardt W, Urlaub H, Galán J. A substrate of the centisome 63 type III protein secretion system of Salmonella typhimurium is encoded by a cryptic bacteriophage. Proceedings Of The National Academy Of Sciences Of The United States Of America 1998, 95: 2574-2579. PMID: 9482928, PMCID: PMC19418, DOI: 10.1073/pnas.95.5.2574.Peer-Reviewed Original ResearchConceptsType III protein secretion systemType III secretion systemProtein secretion systemSecretion systemEffector proteinsInvasion-associated type III secretion systemCluster of genesTail fiber proteinHost cell cytoplasmSouthern hybridization analysisMobile genetic elementsCultured epithelial cellsInduction of apoptosisSopE proteinEnterica serovar TyphimuriumBacteriophage genesBacterial entryCytoskeletal rearrangementsS. enterica serovar TyphimuriumGenetic elementsPathogenicity islandFiber proteinHybridization analysisCell cytoplasmEffector molecules
1997
A secreted Salmonella protein with homology to an avirulence determinant of plant pathogenic bacteria
Hardt W, Galán J. A secreted Salmonella protein with homology to an avirulence determinant of plant pathogenic bacteria. Proceedings Of The National Academy Of Sciences Of The United States Of America 1997, 94: 9887-9892. PMID: 9275221, PMCID: PMC23287, DOI: 10.1073/pnas.94.18.9887.Peer-Reviewed Original ResearchConceptsPlant pathogenic bacteriaType III protein secretion systemProtein secretion systemSecretion systemPlant pathogen Xanthomonas campestris pvPathogen Xanthomonas campestris pvType III secretion systemPathogenic bacteriaXanthomonas campestris pvAvirulence determinantEffector proteinsSequence similaritySalmonella proteinsBacterial proteinsCampestris pvPutative targetsSophisticated mechanismsHost cellsYersinia pseudotuberculosisNovel familyProteinBacterial pathogensNovel targetSalmonella entericaBacteriaThe invasion-associated type-III protein secretion system inSalmonella – a review1Presented at the Workshop on `Type-4 Pili – Biogenesis, Adhesins, Protein Export, and DNA Import', Schloss Ringberg, Germany, 26–29 November 1995.1
Collazo C, Galán J. The invasion-associated type-III protein secretion system inSalmonella – a review1Presented at the Workshop on `Type-4 Pili – Biogenesis, Adhesins, Protein Export, and DNA Import', Schloss Ringberg, Germany, 26–29 November 1995.1. Gene 1997, 192: 51-59. PMID: 9224874, DOI: 10.1016/s0378-1119(96)00825-6.Peer-Reviewed Original ResearchConceptsProtein secretion systemSecretion systemType-4 Pili – BiogenesisHost cellsEukaryotic host cellsSpecialized protein secretion systemNon-phagocytic cellsMolecular genetic analysisDNA importPili biogenesisProtein exportSchloss RingbergCentisome 63Bacterial chromosomeAnimal pathogensGenetic analysisPathogenicity islandGenetic determinantsCellsReview1PresentedChromosomesPlantsProteinTranslocationAdhesins