Secreted alkaline protease that allows assimilation of proteinaceous substrates. Hydrolysis of proteins with broad specificity, and of Bz-Arg-OEt > Ac-Tyr-OEt. Does not hydrolyze peptide amides. Optimum pH is 9. Optimum temperature is 40 degrees Celsius. Expression is controlled by the prtT transcription factor. Belongs to the peptidase S8 family.