Critical for epithelial morphogenesis during oogenesis; border cell migration. Required in the germarium for the polarization of follicle cells during encapsulation of germline cells. Required for embryonic segmentation and trachea specification. Essential receptor molecule for upd and JAK/STAT signaling during oogenesis. Interacts with wdp; the interaction promotes internalization of dome and its subsequent lysosomal degradation; thereby reducing JAK/STAT signaling. Apicolateral membranes in follical cells. In stage 11 embryos, tracheal pits show highest expression, at stage 14 high expression is detected in the posterior spiracles, gut and head. Expressed both maternally and zygotically in embryos. Undergoes lysosomal degradation. Belongs to the type I cytokine receptor family.