Predicted to enable cytokine binding activity and cytokine receptor activity. Predicted to be involved in cytokine-mediated signaling pathway and positive regulation of cell population proliferation. Predicted to be located in plasma membrane. Predicted to be part of receptor complex. Predicted to be active in external side of plasma membrane. Human ortholog(s) of this gene implicated in arteriosclerosis; hyper IgE recurrent infection syndrome 4; hyperandrogenism; and primary immunodeficiency disease. Orthologous to human IL6ST (interleukin 6 cytokine family signal transducer).