TheProteinStABIlityComboKitMD1-103
Thermalshiftassaysprovideinformationontheeffectvariousenvironmentalfactorshaveonthethermaldenaturationofaprotein.Thermaldenaturationisrelatedtoproteinstabilityandthereforecrystallizability.ThemostcommonthermalshiftassayisThermoFluor®,whichmeasuresincreasingfluorescenceinducedbySYPRO®Orangebindingtotheexposedproteinhydrophobiccore.Buttherearemanyothersdependingontherequirementsofyoursample. Ourproteinstabilityscreensarenowavailableinonepackageatadiscountofmorethan20%comparedtobuyingthemseparately(orapproximately4kitsforthepriceof3). TheDurhamScreens DevelopedbyEmilyCardewandEhmkePohlattheUniversityofDurham,thesekitsprovidegreaterdepthofanalysisoftheeffectofindividualbuffers,pHandsalts.TheDurhamscreenisdesignedtoworkwithNAMI,aGUI-basedprogramtoaidinterpretationofthermalshiftdata. TheDurhampHScreencontainsdeconvolutesbuffermoleculeandpHeffectsforaboradrangeofmolecule(28differentbuffers)andpH(4-11). TheDurhamSaltScreenusesmorethan30differentsalts,includingarangeoflanathanides.Itallowdiscriminationbetweendifferentanionsandcationsaswellasrevealingtheeffectsofionicstrength. ReadmoreaboutTheDurhamScreensin:Grøftehauge,MK,Hajizadeh,NR,Swann,MJandPohl,E.Protein-ligandinteractionsinvestigatedbythermalshiftassays(TSA)anddualpolarizationinterferometry(DPI).ActaCrystD71:36-44(2015). TheRUBICScreens InventedbyStaphaneBoivinandRobMeijersattheSamplePerparationandCharacterisationfacilityatEMBLHamburg.TheRubicsscreenconsistsoftwokits: TheRUBICBufferScreendeconstructsthebuffercomponentstoallowarationalinterpretationanddeconvolutionofpH,buffermoleculeandionicstrengtheffects. TheRUBICAdditiveScreenanalyzestheeffectonstabilityofvariouscommonadditivesincludingions,detergents,sugars,aminoacids,imidazole,cryoprotectantsandreducingagents.
TheRUBICScreensaredescribedin:BoivinS,KozakS,MeijersR.(2013)OptimizationofproteinpurificationandcharacterizationusingThermofluorscreens.ProteinExprPurif.91(2):192-206.
Reference:NewmanJ.(2004)Novelbuffersystemsformacromolecularcrystallization.ActaCrystallogrDBiolCrystallogr.60:610-2.
Storageconditions:
TheDurhampHScreenispresentedas96x0.5mLconditionsinadeep-wellblock.Theyarepreservativefreeanditisrecommendedthattheyarestoredat4°C,howevertheycanbeusedatroomtemperatureforscreenset-up.
RUBICBufferscreenisfreeofpreservatives.ShippingatRoomTemperature.Short-termStorageat4˚C.Itisrecommendedthatusersprefillplatesandstorethemat-20˚C.
ThermoFluorisaregisteredtrademarkofJohnsonandJohnson.SYPROisaregisteredtrademarkofLifeTechnologies.