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Usbio/384971 Rabbit Anti-Calnexin-CT (Calnexin, CALX HUMAN, CANX, CNX, Histocompatibility Complex Class I Antigen Binding Protein P88, IP90, Major Histocompatibility Complex Class I Antigen-Binding Protein P88, P90)/384971/200ul
Calnexin,anabundant~90kDintegralproteinoftheendoplasmicreticulum,isalsoreferredtoasIP90,p88andp90(1).Itconsistsofalarge50kDN-terminalcalcium-bindingluminaldomain,asingletransmembranehelixandashortacidiccytoplasmictail(2,3).UnlikeitsERcounterpartswhichhaveaKDELsequenceontheirC-terminustoensureERretention(4),calnexinhaspositivelychargedcytosolicresiduesthatdothesamething(3).MostERproteinsactasmolecularchaperonesandparticipateintheproperfoldingofpolypeptidesandtheirassemblyintomulti-subunitproteins.Calnexintogetherwithcalreticulin,playsakeyroleinglycoproteinfoldinganditscontrolwithintheER,byinteractingwithfoldingintermediatesviatheirmono-glycosylatedglycans(5,6).CalnexinhasalsobeenshowntoassociatewiththemajorhistocompatibilitycomplexclassIheavychains,partialcomplexesoftheTcellreceptorandBcellmembraneimmunoglobulin(7).