Description:

 

Principle:

Nuclearhormonereceptors(NHRs)areagroupofligand-bindingtranscriptionfactors(TFs). Morethan350NHRsareavailableinthePDB.LikeotherTFs,theyareabletoregulategeneexpressionbybindingtospecificDNAregulatoryelements,buttheiractivitiesaremodulatedbythecorrespondingligands.Theyplaymanyimportantphysiologicalfunctionssuchasembryonicdevelopment,organphysiology,celldifferentiationandhomeostasis.Theyarealsoassociatedwithhumandiseasesincludingcancer,obesity/diabetes,arthritisandasthma.Membersofthisfamilyareoftenchosentobedrugtargets.

Conventionally,theresponseelement-luciferasereporterassaysareusedtostudyendogenousorexogenousreceptors,andanalyzethereceptorsignalingpathwayinanativeBIOLOGicalcontext. DuetotheirlowsensitivityoftheseassaysandthesimilarresponseelementsharedbymultipleNHRs,theirapplicationsarelimited. SignosishasdevelopedLDB-drivenGAL4reporterHEK293stablecelllinesbydeliveringtwovectors,oneexpressing8copiesofGAL4upstreamactivatorsequences(UAS)infrontoftheluciferasereportergene,anotherexpressingGal4DNABindingDomain(DBD)andGRligandbindingdomain(LBD).Uponadditionofacorrespondingligand,theDBD-LBDfusionproteinisactivated,andbindstoGALpromoterbindingsite,leADIngtotheinductionofluciferase. ThestablecloneswereselectedwithhygromycinandG418,ThefunctionalassaywassubsequentlyconductedbyDEXtreatment,andtheclonewiththehighestinductionfold(50)hasbeenchosenforthisproduct.Theadvantagesofthesestablecelllinesarelowcross-reactivitywithothernuclearreceptorsandlesstoxicityofthechimericreceptorstothecellswhenoverexpressed. ThesecelllinescanbeusedtoscreendrugcompoundsforagoNISTorantagonisthitidentification.

 

 

Signosis基因表达  是利用来自基因的信息指导功能性基因产物合成的过程。这些产品通常是蛋白质。基因表达分析对于理解基因及其蛋白产物的功能，以及对影响基本生物学过程的复杂调控网络的清晰了解至关重要。Signosis  提供了许多用于基因表达研究的测定产品，包括用于监控由TF上调或下调的基因表达的cDNA板阵列，以及用于分析基因表达的单细胞PCR试剂盒，可直接分析细胞无需RNA分离即可进行裂解。 SARS-CoV-2实时PCR检测试剂盒单细胞基因表达分析印迹分析RNA的cDNA板阵列细胞裂解液的cDNA板阵列