Overview | Millipore’sFlowCellect?MAPKActivationDualDetectionkitincludestwodirectlyconjugatedantibodies,aphospho-specificAnti-phospho-ERK1/2(Thr202/Tyr204,Thr185/Tyr187)-PEandanAnti-ERK1/2-AlexaFluor?647conjugatedantibodytomeasuretotallevelsofERK.ThistwocolorflowcytometrykitisdesignedtomeasuretheextentofMAPKphosphorylationrelativetothetotalMAPKexpressioninanygivencellpopulation.Bydoingsuch,thelevelsofboththetotalandphosphorylatedproteincanbemeasuredsimultaneouslyinthesamecell,resultinginanormalizedandaccuratemeasurementofMAPKactivationafterstimulation.Moreover,simultaneousmeasurementofbothtotalandphospho-ERK1/2confirmstargetspecificityofthephosphorylationevent.Together,atotalandphosphoantibodyduoperformedinmultiplexprovidesanenhancedandmorereliabledetectionofthephospho:totalratiowithinamixedpopulation. AllFlowCellectkitsaresuppliedwithoptimizedfixation,permeABIlization,wash,andassaybufferstoprovideresearcherstheabilitytodetecttheactivationofERKinflowapplications.Sufficientreagentsareprovidedfor25two-colorsamples.Thekitincludesalloptimizedfluorescentlylabeledantibodiesandbuffersnecessaryforcellpreparationandanalysis. |
BackgroundInformation | Erk(Extracellularsignal-RelatedKinase)isafamilyoftwo,highlyhomologousproteinsdenotedasErk1(p44,MAPK3)andErk2(p42,MAPK1)thatbothfunctioninthesamepathway.ThetwoproteinsareoftenreferredtocollectivelyasErk1/2orp44/p42MAPkinase.TheErkpathwayisconsideredtheclassical,canonicalMAPK(Mitogen-ActivatedProteinKinase)signalingpathway.Itisanevolutionarilyconservedpathwaythatcontrolsandisacriticalregulatorofthegrowthandsurvivalthroughthepromotionofcellproliferationandthepreventionofapoptosis.Erkisinvolvedinthecontrolofmanyfundamentalcellularprocessesincludingcellproliferation,survival,differentiation,apoptosis,motilityandmetabolism.Erkisactivatedbygrowthfactorstimulationofreceptortyrosinekinases(RTKs),GPCR,and/orintegrinstimulation.ThisactivatestheRas-Raf-MEK-Erkpathwaythatresultsinthephosphorylation/activationofErk1/2(p44/p42)ontheTxYmotif(Thr202/Tyr204andThr185/Tyr187forErk1&Erk2,respectively).
Theregulationofalargenumberofcellularprocesses(suchascellproliferation/differentiation,cellsurvivalandapoptosis)isdependentontheactivationofMAPKsignalingpathway,whichcanbemeasuredbythephosphorylationofERK1/2. |