Thisproductisfreezedried.Allwatermoleculeshavebeenremoved.
- Peptide(C)DDYGRPGIEKFREE,correspondingtoaminoacidresidues216-229ofhumanCaSR(Accession P41180). Extracellular,N-terminus.
- CellsurfacedetectionofCaSRinliveintacthumanTHP-1monocyticleukemiacells:___ Cellsalone.
___ Cells+RabbitIgGisotypecontrol-FITC.
___ Cells+ Anti-CalciumSensingReceptor (extracellular)-FITCAntibody(#ACR-004-F),2.5µg.CellsurfacedetectionofCaSRinliveintactmouseJ774macrophagecells:___ Cellsalone.
___ Cells+RabbitIgGisotypecontrol-FITC.
___ Cells+ Anti-CalciumSensingReceptor (extracellular)-FITCAntibody(#ACR-004-F),5µg.
- 1.Riccardi,D.andBrown,E.M.(2010)Am.J.Physiol.298,F485.
- 2.Hendy,G.N.etal.(2013)BestPract.Res.Clin.Endocrinol.Metab.27,285.
Thecalcium-sensingreceptor(CaSR)isaclassCG-protein-coupledreceptorencodedbyasinglecopygene.CaSRplaysamajorroleinthemaintenanceofaphysiologicalserumionizedCa2+ concentrationbyregulatingthecirculatinglevelsofparathyroidhormone1.
TheN-terminusofthereceptoriscomprisedofasignalpeptideof19 aminoacids.ThisterminusdirectsthenascentCaSRpolypeptideintothelumenoftheendoplasmicreticulum(ER)andisthencleaved.Theextracellulardomain(ECD)ofthematureproteinhasapproximately600 aminoacids,comprisedofabi-lobedVenus-flytrap-likedomain(VFT)connectedbyacysteine-richregionandashortpeptidelinkertotheseventransmembranedomain(TMD)withanintracellularC-terminaltailof216 aminoacids.CaSRfunctionsasahomodimerwithbothcovalentandnoncovalentinteractionsbetweentheVFTdomainsofeachmonomer. Ca2+ bindsinthecleftbetweenthetwolobesofeachVFTcausingthelobestocloseononeanotherandtheVFTtorotatewithtransferofaconformationalchangetothecysteine-richregion.
Intheparathyroidgland,up-regulationofCaSRby1,25-dihydroxyvitaminD[1,25(OH)2D]makestheglandmoreresponsivetoextracellularCa2+ andparathyroidhormone(PTH)secretionisreduced.Whilesomaticmutationsin CASR arerare,parathyroidglandsfrompatientswithprimaryorsevereuremicsecondaryhyperparathyroidismhavereducedCaSRexpression2.
Anti-CalciumSensingReceptor(extracellular)Antibody(#ACR-004)isahighlyspecificantibodydirectedagainstanepitopeofthehumanCaSR.Theantibodycanbeusedinwesternblot,immunohistochemistry,indirectflowcytometry,andimmunocytochemistryapplications.IthasbeendesignedtorecognizeCaSRfromhuman,rat,andmousesamples.
Anti-CalciumSensingReceptor(extracellular)-FITCAntibody(#ACR-004-F)isdirectlyconjugatedtofluoresceinisothiocyanate(FITC).Thislabeledantibodycanbeusedinimmunofluorescentapplicationssuchasdirectflowcytometryusinglivecells.