Immunogen | SyntheticpeptidecorrespondingtoresiduesfollowingSer29ofhumancaspase-3(N-terminusofp17subunit). |
Epitope | N-terminus |
Clone | E83-103 |
Host | Rabbit |
Specificity | Thisantibodyonlydetectspro-form(35kD)ofcaspase-3,anddoesnotrecognizeanycleavedcaspases. |
Isotype | IgG |
SpeciesReactivity | |
AntibodyType | MonoclonalAntibody |
EntrezGeneNumber | |
EntrezGeneSummary | Thisgeneencodesaproteinwhichisamemberofthecysteine-asparticacidprotease(caspase)family.Sequentialactivationofcaspasesplaysacentralroleintheexecution-phaseofcellapoptosis.Caspasesexistasinactiveproenzymeswhichundergoproteolyticprocessingatconservedasparticresiduestoproducetwosubunits,largeandsmall,thatdimerizetoformtheactiveenzyme.Thisproteincleavesandactivatescaspases6,7and9,andtheproteinitselfisprocessedbycaspases8,9and10.Itisthepredominantcaspaseinvolvedinthecleavageofamyloid-beta4Aprecursorprotein,whichisassociatedwithneuronaldeathinAlzheimer"sdisease.Alternativesplicingofthisgeneresultsintwotranscriptvariantsthatencodethesameprotein.[providedbyRefSeq].
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GeneSymbol | - Apopain
- CASP-3
- CPP-32
- CPP32
- CPP32B
- EC3.4.22.56
- OTTHUMP00000165054
- SCA-1
- Yama
- apopain
- procaspase3
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PurificationMethod | Unpurified |
UniProtNumber | |
UniProtSummary | FUNCTION:InvolvedintheactivationcascadeofcaspasesresponsIBLeforapoptosisexecution.Attheonsetofapoptosisitproteolyticallycleavespoly(ADP-ribose)polymerase(PARP)ata"216-Asp-|-Gly-217"bond.Cleavesandactivatessterolregulatoryelementbindingproteins(SREBPs)betweenthebasichelix-loop-helixleucinezipperdomainandthemembraneattachmentdomain.Cleavesandactivatescaspase-6,-7and-9.Involvedinthecleavageofhuntingtin.
CATALYTICACTIVITY:StrictrequirementforanAspresidueatpositionsP1andP4.IthasapreferredcleavagesequenceofAsp-Xaa-Xaa-Asp-|-withahydrophobicamino-acidresidueatP2andahydrophilicamino-acidresidueatP3,althoughValorAlaarealsoacceptedatthisposition.
ENZYMEREGULATION:Inhibitedbyisatinsulfonamides.
SUBUNITSTRUCTURE:Heterotetramerthatconsistsoftwoanti-parallelarrangedheterodimers,eachoneformedbya17kDa(p17)anda12kDa(p12)subunit.
SubcellularlocationCytoplasm.
TISSUESPECIFICITY:Highlyexpressedinlung,spleen,heart,liverandkidney.Moderatelevelsinbrainandskeletalmuscle,andlowintestis.Alsofoundinmanycelllines,highestexpressionincellsoftheimmunesystem.
PTM:CleavagebygranzymeB,caspase-6,caspase-8andcaspase-10generatesthetwoactivesubunits.Additionalprocessingofthepropeptidesislikelyduetotheautocatalyticactivityoftheactivatedprotease.Activeheterodimersbetweenthesmallsubunitofcaspase-7proteaseandthelargesubunitofcaspase-3alsooccurandviceversa.
S-nitrosylatedonitscatalyticsitecysteineinunstimulatedhumancelllinesanddenitrosylateduponactivationoftheFasapoptoticpathway,associatedwithanincreaseinintracellularcaspaseactivity.Fasthereforeactivatescaspase-3notonlybyinducingthecleavageofthecaspasezymogentoitsactivesubunits,butalsobystimulatingthedenitrosylationofitsactivesitethiol.
SEQUENCESIMILARITY:BelongstothepeptidaseC14Afamily.
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MolecularWeight | ~35kDa |