Description | |
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CatalogueNumber | S7810 |
BrandFamily | Chemicon® |
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Description | CpGWIZ®RB1-MethylationspecificPCRassay |
Overview | MSP,performedusingtheCpGenome™DNAModificationKitandtheCpGWIZ®RB1AmplificationKit,permitssensitivedetectionofalteredDNA.BecausethisisaPCR-basedassay,itisextremelysensitive,facilitatingthedetectionoflownumbersofmethylatedallelesandthestudyofsamplescontainingsmallamountsofDNA.MSPalsoallowsexaminationofallCpGsites,notjustthosewithinsequencesrecognizedbymethylationsensitiverestrictionenzymes.Increasingthenumberofsuchsiteswhichcanbeassessedallowsrapid,finemappingofmethylationpatternsthroughoutCpGregions.Inaddition,thebisulfitemodificationisideallysuitedforanalysisofCpGislandssinceitconvertsthemajorityofcytosinestouracils,makingaregionofthegenomewhichisCG-richlessdifficulttoamplifybyPCR. Methylation-specificPCR(MSP)employsaninitialbisulfitereactiontomodifytheDNA,followedbya"hotstart"PCRamplificationwithspecificprimersdesignedtodistinguishmethylatedDNAfromunmethylatedDNA.AsshowninFigure1,inthebisulfitereaction,allunmethylatedcytosinesareconvertedtouracilswhile5-methylcytosinesremainunaltered.Thus,thesequenceofthetreatedDNAwilldifferiftheDNAisoriginallymethylatedvs.unmethylated.PrimerscontainedintheCpGWIZ®RB1AmplificationKitaredesignedtospecificallyamplifyeachofthesequencesbaseduponthesechemically-induceddifferences.IfthesampleDNAwasoriginallyunmethylated,aproductwillbegeneratedafterPCRusingtheUprimerset.Conversely,aproductwillbegeneratedusingtheMprimersetifthesamplewasoriginallymethylated. |
BackgroundInformation | Methylationofcytosineslocated5"toguanosineisknowntohaveaprofoundeffectontheexpressionofseveraleukaryoticgenes(1).Innormalcells,methylationoccurspredominantlyinCG-poorregions,whileCG-richareas,calledCpGislands,remainunmethylated.AberrantmethylationofnormallyunmethylatedCpGislandshasbeendocumentedasarelativelyfrequenteventinimmortalizedandtransformedcells(2)andhasbeenassociatedwithtranscriptionalinactivationofdefinedtumorsuppressorgenesinhumancancers(3,4).Theretinoblastoma1(RB1)geneexhibitscharacteristichypermethylationimmanymaligninanttumors. PreviouslydevelopedmethodstodeterminethemethylationstatusofcytosineincludedigestionwithmethylationsensitiverestrictionenzymesandgenomicDNAsequencing.Bothtechniqueshavelimitations:restrictionenzymescanonlydetectmethylationsiteswithintheirrecognitionsequenceandsequencingistimeconsuming.IncreasingthedetectionsensitivityofCpGislandmethylationhasthepotentialtodefinetumorsuppressorgenefunctionandprovidesanewstrategyforearlytumordetection. Methylation-specificPCR(MSP)isanewtechnologyforsensitivedetectionofabnormalgenemethylationutilizingsmallamountsofDNA(5).ThisprocessemploysaninitialbisulfitereactiontomodifytheDNA,followedbyPCRamplificationwithspecificprimersdesignedtodistinguishmethylatedfromunmethylatedDNA.TheCpGenome™DNAModificationKit(S7820)containsthereagentsnecessarytoperformtheinitialbisulfitereactions,whiletheCpGWIZ®RB1AmplificationKitcontainsthereagentsrequiredforthePCRamplificationreactions. |
MaterialsRequiredbutNotDelivered | EquipmentandSupplies a.MicrocentrifugetubesforPCRamplification b.Aerosol-resistantPipettetips c.Thermocycler d.Gelelectrophoresisapparatus(verticalorhorizontal) e.PowerSupply f.302nmUVtransIlluminator,cameraandfilm Reagents a2.5mMdNTPmix(2.5mMofeachnucleotide) b."Hotstart"Taqpolymerase c."Hotstart"PCRreagents(seeSec.II.Protocols). d.Reagentsforgelelectrophoresis(1XTBEand2%agarose,10%acrylamide,orsuitablehighresolutionagarose) e.DNAMarkers(sizerange100-300bp) f.Ethidiumbromide(10mg/mL) g.Gel-loADIngsolution/LoadingDye h.BisulfiteModifiedDNA(CpGenome™DNAModificationKit,S7820) |
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Application | MSP,performedusingtheCpGenomeDNAModificationKit&theCpGWIZRB1AmplificationKit,permitssensitivedetectionofalteredDNA. |
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EntrezGeneSummary | Retinoblastoma(RB)isanembryonicmalignantneoplasmofretinalorigin.Italmostalwayspresentsinearlychildhoodandisoftenbilateral.Spontaneousregression("cure")occursinsomecases.TheretinoblastomageneRBwasthefirsttumorsuppressorgenecloned,andisanegativeregulatorofthecellcyclethroughitsABIlitytobindthetranscriptionfactorE2F(MIM189971)andrepresstranscriptionofgenesrequiredforSphase(HanahanandWeinberg,2000[PubMed10647931]).[suppliedbyOMIM] |
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UniProtSummary | FUNCTION:SwissProt:P06400#Keyregulatorofentryintocelldivisionthatactsasatumorsuppressor.Directlyinvolvedinheterochromatinformationbymaintainingoverallchromatinstructureand,inparticular,thatofconstitutiveheterochromatinbystabilizinghistonemethylation.RecruitsandtargetshistonemethyltransferasesSUV39H1,SUV420H1andSUV420H2,leadingtoepigenetictranscriptionalrepression.ControlshistoneH4"Lys-20"trimethylation.AlsoactsasatranscriptionrepressorofE2Ftargetgenesbyrecruitingchromatin-modifyingenzymestopromoters.InhibitstheintrinsickinaseactivityofTAF1.FormsacomplexwithadenovirusE1AandwithSV40largeTantigen.MaybindandmodulatefunctionallycertaincellularproteinswithwhichTandE1Acompeteforpocketbinding. SIZE:928aminoacids;106159Da SUBUNIT:InteractspreferentiallywithtranscriptionfactorE2F1.TheunphosphorylatedforminteractswithARID3B,JARID1A,SUV39H1,MJD2A/JHDM3AandTHOC1.InteractswiththeN-terminaldomainofTAF1.InteractswithAATF,DNMT1,LIN9,LMNA,SUV420H1,SUV420H2,PELP1andTMPO-alpha.MayinteractwithKNTC2.InteractswithEID1andZUBR1.InteractswithARID4AandJARID1B. SUBCELLULARLOCATION:Nucleus. TISSUESPECIFICITY:Expressedintheretina. PTM:PhosphorylatedfromStoMphaseofthecellcycleandisdephosphorylatedinG1.T,butnotE1A,bindsonlytotheunphosphorylatedform. DISEASE:SwissProt:P06400#DefectsinRB1arethecauseofchildhoodcancerretinoblastoma(RB)[MIM:180200].RBisacongenitalmalignanttumorthatarisesfromthenuclearlayersoftheretina.Itoccursinabout1:20"000livebirthsandrepresentsabout2%ofchildhoodmalignancies.Itisbilateralinabout30%ofcases.AlthoughmostRBappearsporadically,about20%aretransmittedasanautosomaldominanttraitwithincompletepenetrance.Thediagnosisisusuallymadebeforetheageof2yearswhenstrabismusoragraytoyellowreflexfrompupil(cateye)isinvestigated.&DefectsinRB1areacauseofbladdercancer[MIM:109800].&DefectsinRB1areacauseofosteogenicsarcoma[MIM:259500]. SIMILARITY:SwissProt:P06400##Belongstotheretinoblastomaprotein(RB)family. |
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Millipore常用产品报价单
产品名 | 货号 | 公司分类 | 商城分类 | 美金价 |
Millipore/475855-1R神奇滤布 密理博Millipore现货促销 | 475855-1R | Life Science Research | 膜 | 93.50 | Millipore/17-701/EZ-Magna RIP™ RNA-Binding Protein Immunoprecipitation Kit | 17-701 | Life Science Research | 定量试剂盒 | 653.00 | Millipore/RIPAb+ Ago2 - RIP Validated Antibody and Primer Set | 03-110 | Life Science Research | 抗体套装 | 433.00 | Millipore/CBL468F | Anti-PECAM-1 Antibody, clone HC1/6, FITC conjugated/CBL468F/100 assays | CBL468F | Antibodies and Assays | 功能性抗体 | 298.00 | Millipore/ECM460 | αVβ3/PECAM Investigator Kit/ECM460/1 kit | ECM460 | Antibodies and Assays | 夹心法ELISA | 477.00 |