Combining with a signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity by catalysis of the reaction: a protein + ATP = a phosphoprotein + ADP.
transmembrane receptor protein phosphatase activity +
reactome:R-HSA-8983059 "STAT3 is phosphorylated by TSLP:IL7R:CRLF2:STAT3 complex"
;
reactome:R-HSA-8983063 "JAK3 in IL7:p-Y449-IL7R:JAK1:IL2RG:JAK3 is phosphorylated"