Overview | PrinterFriendlyVersion |
Ex/Em(nm) | 494/521 |
MW | N/A |
CAS# | N/A |
Solvent | DMSO |
Storage | F/D/L |
Category | EnzymeDetection PeptidasesandProteases |
Related | MicroplateReaders BiochemicalAssays |
Spectrum | AdvancedSpectrumViewer |
ProtocolA:Measureproteaseactivityintestsamples
1.Prepareworkingsolutions:
1.1 Makeproteasesubstratesolution:DiluteProteaseSubstrate(ComponentA)at1:100in2Xassaybuffer(ComponentC).Use50μLofproteasesubstratesolutionperassayina96-wellplate.
Note:The2XAssayBuffer(ComponentC)isdesignedfordetectingtheactivityofchymotrypsin,trypsin,Thermolysin,proteinaseK,proteaseXIV,andhumanleukocyteelastase.Forotherproteases,pleaserefertoAppendixIfortheappropriateassaybufferformula.
1.2 Trypsindilution:DiluteTrypsin(5U/µL,ComponentB)at1:50inde-ionizedwatertogetaconcentrationof0.1U/µL.
2.Addreagentspreparedinstep1intoa96-wellmicroplateaccordingtoTable1andTable2.
Table1.Layoutofthesubstratecontrol,positivecontrol,andtestsamplesina96-wellmicroplate
SC | SC |
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PC | PC |
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TS | TS |
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Note:SC=SubstrateControl,PC=PositiveControl,TS=TestSamples.
Table2.Reagentcompositionforeachwell
SubstrateControl | PositiveControl | TestSample |
De-ionizedwater:50µL | Typsindilution:50µL | Protease-containingsamples:50µL |
Totalvolume:50µL | Totalvolume:50µL | Totalvolume:50µL |
Note:Iflessthan50μLofprotease-containingbiologicalsampleisused,addddH2Otomakeatotalvolumeof50µL.
3.Runtheenzymaticreaction:
3.1 Add50µLofproteasesubstratesolution(fromStep1.1)toallthewellsintheassayplate.Mixthereagentswell.
3.2 MonitorthefluorescenceincreasewithafluorescenceplatereaderatEx/Em=490/525nm.
ForkineticreADIng:Immediatelystartmeasuringfluorescenceintensitycontinuouslyandrecorddataevery5minutesfor30minutes.
Forend-pointreading:Incubatethereactionatadesiredtemperaturefor30to60minutes,protectedfromlight.Thenmeasurethefluorescenceintensity.
ProtocolB:Screeningproteaseinhibitorsusingapurifiedenzyme
1.Prepareworkingsolutions:
1.1 Make1Xassaybuffer:Add5mLde-ionizedwaterinto5mLof2XAssayBuffer(ComponentC).
1.2 Makeproteasesubstratesolution:DiluteProteaseSubstrate(ComponentA)at1:20in1Xassaybuffer(fromStep1.1).Use10μL/wellofproteasesubstratesolutionfora96-wellplate.
Note:The2Xassaybuffer(ComponentC)isdesignedfordetectingtheactivityofchymotrypsin,trypsin,thermolysin,proteinaseK,proteaseXIV,andhumanleukocyteelastase.Forotherproteases,pleaserefertoAppendixIfortheappropriateassaybufferformula.
1.3 Proteasedilution:Dilutetheproteasein1Xassaybuffertoaconcentrationof500-1000nM.Eachwellwillneed10µLofproteasedilution.Prepareanappropriateamountforallthetestsamplesandextraforthepositivecontrolandvehiclecontrolwells.
2.Addreagentspreparedinstep1intoa96-wellmicroplateaccordingtoTable1andTable2.
Table1.Layoutofthesamplesina96-wellmicroplate