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Specifications
The26Sproteasomeisthecentralproteaseinubiquitin-mediatedproteindegradation.Itisalargemulti-proteincomplex,whichplaysafundamentalroleincellularhomeostasisbycontrollingdegradationofkeyproteinsthatareinvolvedinapoptosis,cellcycle,andsignaltransduction.The26SproteasomeisresponsIBLeforcellqualitycontrolbyeliminatingmisfoldedproteinsfromthecytosolandendoplasmicreticulum.Withitsdiversefunctions,theproteasomeisanimportanttargetfordrugdevelopment,particularlyincancerandneurodegeneration.
Anumberofselectiveproteasomeinhibitorshavebeenidentifiedinthelasttwodecadesandapprovedforclinicaluse(bortezomib,carfilzomib).Severalotherproteasomalinhibitorsarecurrentlyintrialsfortreatmentofmultiplemyelomaandothermalignancies.The26Sproteasomeiscomposedofasinglecatalytic20Scomplex(coreparticle,CP)andoneortwo19Sregulatorycomplexes(regulatoryparticles,RP).The19Sregulatorycomplexisresponsiblefordeubiquitylation,unfoldingandre-directionofproteinstothecatalyticsiteswithinthe20Scomplex.
Note:
- Thechymotrypsin-likeactivityofthe26Sproteasome(45µg/mL)wasmeasuredusing100µMSuc-LLVY-AMCin20mMHEPES,pH7.5,0.5mMEDTA,0.05%TritonX,plusorminus0.035%SDS.
- Thechymotrypsin-likeactivityofthe26Sproteasome(18µg/mL)wasmeasuredusing100µMSuc-LLVY-AMCin20mMHEPES,pH7.5,0.5mMEDTA,0.05%TritonX,plusorminus0.5mMMG132(Cat.# SI9710)
Info
Source | Humanredbloodcells |
Quantity | 25µgat 0.5mg/mL |
State | Liquid(buffer: 20mMTris-HClpH7.2,10%Glycerol,150mMKCl,1mMβ–mercaptoethanol) |
Storage | -80°C;Avoidrepeatedfreeze/thawcycles |