2014
Regulation of Rac1 translocation and activation by membrane domains and their boundaries
Moissoglu K, Kiessling V, Wan C, Hoffman BD, Norambuena A, Tamm LK, Schwartz MA. Regulation of Rac1 translocation and activation by membrane domains and their boundaries. Journal Of Cell Science 2014, 127: 2565-2576. PMID: 24695858, PMCID: PMC4038948, DOI: 10.1242/jcs.149088.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCell MembraneFluorescence Resonance Energy TransferGTPase-Activating ProteinsHEK293 CellsHumansMembrane MicrodomainsMiceNIH 3T3 CellsProtein BindingProtein TransportRac1 GTP-Binding ProteinRho-Specific Guanine Nucleotide Dissociation InhibitorsSignal TransductionUnilamellar LiposomesConceptsFluorescence resonance energy transferMembrane domainsRac1 translocationGDP dissociation inhibitor proteinLiquid-ordered membrane domainsGTPase-activating proteinsNon-raft regionsNon-raft domainsBinding of Rac1Activation of Rac1Single-molecule analysisGTP loadingRho GTPasesLipid raftsRac1 localizationRho GTPaseInhibitor proteinResult of inactivationRac1Resonance energy transferFunctional studiesNovel mechanismLipid bilayersTranslocationRafts
2011
Super-Resolution Microscopy: A New Dimension in Focal Adhesions
Schwartz MA. Super-Resolution Microscopy: A New Dimension in Focal Adhesions. Current Biology 2011, 21: r115-r116. PMID: 21300274, DOI: 10.1016/j.cub.2010.12.025.Peer-Reviewed Original Research
2007
Function of the N-terminus of zizimin1: autoinhibition and membrane targeting
Meller N, Westbrook MJ, Shannon JD, Guda C, Schwartz MA. Function of the N-terminus of zizimin1: autoinhibition and membrane targeting. Biochemical Journal 2007, 409: 525-533. PMID: 17935486, PMCID: PMC2740492, DOI: 10.1042/bj20071263.Peer-Reviewed Original ResearchConceptsGEF domainCZH proteinsRho family small GTPasesPH domain bindsCdc42-specific GEFMultiple cellular functionsBasis of homologyN-terminal regionSmall GTPasesDomain bindsGEF activityRho proteinsCellular functionsRho-GEFsNovel functionN-terminusCritical regulatorStructural domainsLimited proteolysisZizimin1ProteinBindsDomainMembraneGTPasesRac, membrane heterogeneity, caveolin and regulation of growth by integrins
Del Pozo MA, Schwartz MA. Rac, membrane heterogeneity, caveolin and regulation of growth by integrins. Trends In Cell Biology 2007, 17: 246-250. PMID: 17363257, DOI: 10.1016/j.tcb.2007.03.001.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCaveolinsCell AdhesionCell MembraneCell ProliferationHumansIntegrinsRac GTP-Binding ProteinsConceptsCholesterol-enriched membrane domainsAnchorage dependenceGrowth regulatory pathwaysRegulation of growthBlocks cell proliferationCancer cell invasionMembrane domainsRegulatory pathwaysCaveolin-1Cell invasionTyr-14Membrane heterogeneityNon-adherent cellsMultiple pathwaysCell proliferationBinding sitesRacImportant mechanismIntegrinsPathwayCaveolinCellsPtdInsCaveolaeEndocytosis
2006
Integrin-mediated adhesion regulates membrane order
Gaus K, Le Lay S, Balasubramanian N, Schwartz MA. Integrin-mediated adhesion regulates membrane order. Journal Of Cell Biology 2006, 174: 725-734. PMID: 16943184, PMCID: PMC2064315, DOI: 10.1083/jcb.200603034.Peer-Reviewed Original ResearchConceptsFocal adhesionsMembrane orderCholesterol-dependent domainsSpecific protein complexesLipid raft propertiesIntegrin-mediated adhesionFluorescent probe LaurdanProtein complexesRaft componentsDetachment of cellsRaft propertiesCell adhesionCell membraneSubunit BProbe LaurdanCaveolinCaveolaeAdhesionDomainImportant consequencesTyr14Caveolin1PhosphorylationTraffickingTwo-photon microscopyIn Vivo Dynamics of Rac-Membrane Interactions
Moissoglu K, Slepchenko BM, Meller N, Horwitz AF, Schwartz MA. In Vivo Dynamics of Rac-Membrane Interactions. Molecular Biology Of The Cell 2006, 17: 2770-2779. PMID: 16597700, PMCID: PMC1474787, DOI: 10.1091/mbc.e06-01-0005.Peer-Reviewed Original ResearchMeSH Keywords3T3 CellsAnimalsCell MembraneComputer SimulationDiffusionGenes, ReporterGuanine Nucleotide Dissociation InhibitorsKineticsMiceMicroscopy, ConfocalModels, TheoreticalPlasmidsProtein TransportRac GTP-Binding ProteinsRecombinant Fusion ProteinsRecombinant ProteinsRho-Specific Guanine Nucleotide Dissociation InhibitorsConceptsGuanine Nucleotide Dissociation InhibitorGTPase-activating proteinsGTP-RacNucleotide exchange factorsVivo dynamicsSmall hairpin RNADissociation inhibitorMembrane associationExchange factorRac functionGEF Tiam1Hairpin RNARhoGDIPhotobleaching methodRacCytosolOverexpressionMajor routeDissociation rate constantsTiam1RNAProteinDetectable rateMembraneActivation
2004
Integrins Regulate Rac Targeting by Internalization of Membrane Domains
del Pozo MA, Alderson NB, Kiosses WB, Chiang HH, Anderson RG, Schwartz MA. Integrins Regulate Rac Targeting by Internalization of Membrane Domains. Science 2004, 303: 839-842. PMID: 14764880, DOI: 10.1126/science.1092571.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBinding SitesCell AdhesionCell LineCell MembraneCells, CulturedCholera ToxinCholesterolG(M1) GangliosideGlycosylphosphatidylinositolsGuanosine TriphosphateHumansIntegrin beta1IntegrinsLiposomesMembrane MicrodomainsMiceNIH 3T3 CellsRac1 GTP-Binding ProteinRatsRecombinant Fusion ProteinsSignal TransductionTransfectionConceptsMembrane domainsLipid raftsLipid raft markersPlasma membrane cholesterolCholesterol-rich membranesCell plasma membraneMembrane targetingAdhesion of cellsSmall GTPRaft markersIntegrin signalsPlasma membraneDownstream effectorsEffector activationMembrane lipidsMembrane cholesterolAnchorage-dependent cellsExtracellular matrixCell detachmentNonadherent cellsInternalizationRaftsCellsTargetingMembrane
2002
Effects of cell tension on the small GTPase Rac
Katsumi A, Milanini J, Kiosses WB, del Pozo MA, Kaunas R, Chien S, Hahn KM, Schwartz MA. Effects of cell tension on the small GTPase Rac. Journal Of Cell Biology 2002, 158: 153-164. PMID: 12105187, PMCID: PMC2173027, DOI: 10.1083/jcb.200201105.Peer-Reviewed Original ResearchMeSH KeywordsAmidesAnimalsAzepinesCell LineCell MembraneCell MovementCollagenDose-Response Relationship, DrugEnergy TransferGTP PhosphohydrolasesGuanine Nucleotide Exchange FactorsMicroscopy, FluorescenceMicroscopy, Phase-ContrastMicroscopy, VideoNaphthalenesNeoplasm ProteinsProteinsPseudopodiaPyridinesRac GTP-Binding ProteinsRatsStress, MechanicalT-Lymphoma Invasion and Metastasis-inducing Protein 1Time FactorsTransfectionIntegrins regulate GTP-Rac localized effector interactions through dissociation of Rho-GDI
Del Pozo MA, Kiosses WB, Alderson NB, Meller N, Hahn KM, Schwartz MA. Integrins regulate GTP-Rac localized effector interactions through dissociation of Rho-GDI. Nature Cell Biology 2002, 4: 232-239. PMID: 11862216, DOI: 10.1038/ncb759.Peer-Reviewed Original Research
2000
Localized Rac Activation Dynamics Visualized in Living Cells
Kraynov V, Chamberlain C, Bokoch G, Schwartz M, Slabaugh S, Hahn K. Localized Rac Activation Dynamics Visualized in Living Cells. Science 2000, 290: 333-337. PMID: 11030651, DOI: 10.1126/science.290.5490.333.Peer-Reviewed Original ResearchConceptsSmall guanosine triphosphatasesSpatio-temporal controlMembrane rufflesGuanosine triphosphatasesSubcellular localizationNucleotide stateRac activationProtein activityDownstream targetsMotile cellsLiving cellsSpatial controlSpatio-temporal dynamicsGradient of activationCellsActivation dynamicsActivationRufflesTriphosphatasesPrecise spatial controlProteinRacLeading edgeApplicable approachLocalized effectAdhesion to the extracellular matrix regulates the coupling of the small GTPase Rac to its effector PAK
del Pozo M, Price L, Alderson N, Ren X, Schwartz M. Adhesion to the extracellular matrix regulates the coupling of the small GTPase Rac to its effector PAK. The EMBO Journal 2000, 19: 2008-2014. PMID: 10790367, PMCID: PMC305684, DOI: 10.1093/emboj/19.9.2008.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsBiological TransportCdc42 GTP-Binding ProteinCell AdhesionCell LineCell MembraneCulture Media, Serum-FreeCytoplasmEnzyme ActivationExtracellular MatrixFibronectinsGrowth SubstancesGuanosine TriphosphateIntegrinsMiceMutationMyristic AcidP21-Activated KinasesProtein BindingProtein Serine-Threonine KinasesRac GTP-Binding ProteinsRatsRecombinant Fusion ProteinsTransfectionConceptsSmall GTPase RacExtracellular matrixGTPase RacEffector PAKMembrane-targeting sequenceCell cycle progressionAbility of RacSoluble growth factorsAdherent cellsRac mutantGrowth factorCytoskeletal organizationPAK activationOncogenic transformationGene expressionCycle progressionMembrane fractionCell adhesionNon-adherent cellsRacPAKMembraneCellsAdhesionActivation
1998
Activation of Rac and Cdc42 by Integrins Mediates Cell Spreading
Price L, Leng J, Schwartz M, Bokoch G. Activation of Rac and Cdc42 by Integrins Mediates Cell Spreading. Molecular Biology Of The Cell 1998, 9: 1863-1871. PMID: 9658176, PMCID: PMC25428, DOI: 10.1091/mbc.9.7.1863.Peer-Reviewed Original Research
1995
Integrins: Emerging Paradigms of Signal Transduction
Schwartz M, Schaller M, Ginsberg M. Integrins: Emerging Paradigms of Signal Transduction. Annual Review Of Cell And Developmental Biology 1995, 11: 549-599. PMID: 8689569, DOI: 10.1146/annurev.cb.11.110195.003001.Peer-Reviewed Original Research
1993
A 50-kDa integrin-associated protein is required for integrin-regulated calcium entry in endothelial cells.
Schwartz M, Brown E, Fazeli B. A 50-kDa integrin-associated protein is required for integrin-regulated calcium entry in endothelial cells. Journal Of Biological Chemistry 1993, 268: 19931-19934. PMID: 8376355, DOI: 10.1016/s0021-9258(20)80675-9.Peer-Reviewed Original ResearchConceptsIntegrin-associated proteinExtracellular matrix proteinsMatrix proteinsEndothelial cellsIAP functionTransmembrane domainTyrosine phosphorylationPrimary sequenceEndothelial cell adhesionCell adhesionMembrane channelsProteinAnti-integrin antibodiesCalcium entryCellsIntracellular pHIon transportInflux of Ca2Activation of neutrophilsActivationCalcium channelsCalcium influxPhosphorylationNeutrophil functionMonoclonal antibodies
1991
Binding of actin to liver cell membranes: the state of membrane-bound actin.
Tranter M, Sugrue S, Schwartz M. Binding of actin to liver cell membranes: the state of membrane-bound actin. Journal Of Cell Biology 1991, 112: 891-901. PMID: 1705560, PMCID: PMC2288875, DOI: 10.1083/jcb.112.5.891.Peer-Reviewed Original Research
1989
Evidence for a direct, nucleotide-sensitive interaction between actin and liver cell membranes.
Tranter M, Sugrue S, Schwartz M. Evidence for a direct, nucleotide-sensitive interaction between actin and liver cell membranes. Journal Of Cell Biology 1989, 109: 2833-2840. PMID: 2592407, PMCID: PMC2115935, DOI: 10.1083/jcb.109.6.2833.Peer-Reviewed Original Research
1988
How actin binds and assembles onto plasma membranes from Dictyostelium discoideum.
Schwartz M, Luna E. How actin binds and assembles onto plasma membranes from Dictyostelium discoideum. Journal Of Cell Biology 1988, 107: 201-209. PMID: 3392099, PMCID: PMC2115166, DOI: 10.1083/jcb.107.1.201.Peer-Reviewed Original ResearchMeSH KeywordsActin CytoskeletonActinsCell MembraneCross-Linking ReagentsDictyosteliumModels, BiologicalPolymersConceptsPolymerizationSuccessive monomersMembrane surfacePositive cooperativityActin trimerTight bindingAssembly stateHistidine-40Critical concentrationLow salt bufferDerivativesSalt bufferEthoxyformic anhydrideCooperativitySolutionMonomersMembraneAffinityMultivalencyOligomersAnhydrideActin nucleiBindingCross-linking experimentsActin oligomers
1986
Binding and assembly of actin filaments by plasma membranes from Dictyostelium discoideum.
Schwartz M, Luna E. Binding and assembly of actin filaments by plasma membranes from Dictyostelium discoideum. Journal Of Cell Biology 1986, 102: 2067-2075. PMID: 2423531, PMCID: PMC2114255, DOI: 10.1083/jcb.102.6.2067.Peer-Reviewed Original Research