Predicted to enable CCR6 chemokine receptor binding activity; chemoattractant activity; and phosphatidylinositol-4,5-bisphosphate binding activity. Acts upstream of or within defense response to Gram-negative bacterium. Predicted to be located in extracellular region. Predicted to be active in extracellular space. Orthologous to human DEFB4A (defensin beta 4A) and DEFB4B (defensin beta 4B).