Predicted to enable neuromedin B receptor binding activity and neuropeptide hormone activity. Predicted to be involved in positive regulation of hormone secretion. Predicted to act upstream of or within neuropeptide signaling pathway. Predicted to be located in extracellular region and membrane. Predicted to be active in neuron projection. Human ortholog(s) of this gene implicated in obesity. Orthologous to human NMB (neuromedin B).