2016
Ral-Arf6 crosstalk regulates Ral dependent exocyst trafficking and anchorage independent growth signalling
Pawar A, Meier JA, Dasgupta A, Diwanji N, Deshpande N, Saxena K, Buwa N, Inchanalkar S, Schwartz MA, Balasubramanian N. Ral-Arf6 crosstalk regulates Ral dependent exocyst trafficking and anchorage independent growth signalling. Cellular Signalling 2016, 28: 1225-1236. PMID: 27269287, PMCID: PMC4973806, DOI: 10.1016/j.cellsig.2016.05.023.Peer-Reviewed Original ResearchMeSH KeywordsADP-Ribosylation Factor 6ADP-Ribosylation FactorsAnimalsCell AdhesionCell Line, TumorCell ProliferationCell Transformation, NeoplasticEmbryo, MammalianExocytosisExtracellular Signal-Regulated MAP KinasesFibroblastsHumansMembrane MicrodomainsMiceProtein TransportRal GTP-Binding ProteinsSignal TransductionConceptsARF6 activationRegulatory crosstalkActive RalIntegrin-dependent regulationOncogenic H-RasIndependent growthIntegrin-dependent activationAdhesion-dependent pathwayKey downstream mediatorSmall GTPase RalActive RalABladder cancer T24 cellsDependent traffickingRal functionIsoforms functionRaft microdomainsOncogenic RasPlasma membraneDependent regulationH-RasArf6Dependent activationDependent pathwayDownstream mediatorVital mediators
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
Effects of integrin-mediated cell adhesion on plasma membrane lipid raft components and signaling
Norambuena A, Schwartz MA. Effects of integrin-mediated cell adhesion on plasma membrane lipid raft components and signaling. Molecular Biology Of The Cell 2011, 22: 3456-3464. PMID: 21795400, PMCID: PMC3172269, DOI: 10.1091/mbc.e11-04-0361.Peer-Reviewed Original ResearchConceptsLipid raft componentsRaft componentsLipid raftsCyclic adenosine monophosphateCell detachmentCell adhesionLipid raft markersGlycosylphosphatidylinositol-linked proteinsRaft associationRaft markersRho GTPasesNonraft fractionsDetachment of cellsElevation of cAMPStudy of integrinsTermination of growthPlasma membraneH-RasAnchorage dependenceKey defenseCell growthFlotillin2Sucrose gradientsCancer metastasisLipid tails
2009
RalA-Exocyst Complex Regulates Integrin-Dependent Membrane Raft Exocytosis and Growth Signaling
Balasubramanian N, Meier JA, Scott DW, Norambuena A, White MA, Schwartz MA. RalA-Exocyst Complex Regulates Integrin-Dependent Membrane Raft Exocytosis and Growth Signaling. Current Biology 2009, 20: 75-79. PMID: 20005108, PMCID: PMC2822103, DOI: 10.1016/j.cub.2009.11.016.Peer-Reviewed Original ResearchConceptsPlasma membraneRecycling endosomesGrowth signalingActivation of Arf6Small GTPase RalACaveolin-dependent internalizationLipid raft microdomainsAnchorage-independent growthEffects of integrinsExocyst complexActive RalARaft microdomainsMembrane raftsRaft markersIntegrin signalingPancreatic cancer cellsRalAAnchorage dependenceAnchorage independenceCell growthSignalingCell detachmentCancer cellsEndosomesExocytosis
2007
Arf6 and microtubules in adhesion-dependent trafficking of lipid rafts
Balasubramanian N, Scott DW, Castle JD, Casanova JE, Schwartz MA. Arf6 and microtubules in adhesion-dependent trafficking of lipid rafts. Nature Cell Biology 2007, 9: 1381-1391. PMID: 18026091, PMCID: PMC2715295, DOI: 10.1038/ncb1657.Peer-Reviewed Original ResearchConceptsPlasma membraneLipid raftsAnchorage-dependent signalingArf6-dependent mannerCaveolin-dependent internalizationSmall GTPase Arf6Microtubule-dependent traffickingIntegrin-mediated adhesionRecycling endosomesGTPase Arf6Membrane raftsDetachment of cellsCell spreadingF-actinRaftsArf6MicrotubulesEndosomesRac1TraffickingMembraneCellsEndocytosisSignalingPathway
2005
Phospho-caveolin-1 mediates integrin-regulated membrane domain internalization
del Pozo MA, Balasubramanian N, Alderson NB, Kiosses WB, Grande-García A, Anderson RG, Schwartz MA. Phospho-caveolin-1 mediates integrin-regulated membrane domain internalization. Nature Cell Biology 2005, 7: 901-908. PMID: 16113676, PMCID: PMC1351395, DOI: 10.1038/ncb1293.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsCaveolaeCaveolin 1CaveolinsCell AdhesionCell ProliferationDynamin IIEndocytosisExtracellular MatrixExtracellular Signal-Regulated MAP KinasesFocal AdhesionsIntegrinsMembrane MicrodomainsMiceMice, KnockoutMicroscopy, Electron, TransmissionNeoplasm InvasivenessNeoplasmsNIH 3T3 CellsPhosphatidylinositol 3-KinasesPhosphorylationRac GTP-Binding ProteinsConceptsCaveolin-1Cholesterol-enriched membrane microdomainsPhosphatidylinositol-3-OH kinaseCell detachmentNovel molecular mechanismCholesterol-rich domainsInhibition of ERKMembrane microdomainsFocal adhesionsDynamin 2Plasma membraneMolecular mechanismsTumor suppressionTyr-14Multiple pathwaysNormal cellsInternalizationERKRacPathwayCaveolaeKinasePhosphorylationAdhesionMicrodomains
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