Significance and Impact of the Study: We investigated the additional function of two polyurethanases PueA and PueB from Pseudomonas protegens Pf-5, and demonstrated that they are major extracellular lipases that belong to the members of subfamily I.3 lipases, involved in the uptake of oil in Pf-5, of which PueA plays a more important role in extracellular lipase activity. Furthermore, their cognate ABC exporter AprDEF can partly mediate the extracellular secretion of PueA and PueB in Pf-5 and heterologous Escherichia coli BL21(DE3). Lastly, PueA and PueB can also be secreted into the extracellular environment without the help of their cognate AprDEF in Pf-5 and BL21(DE3).