Required for self-resistance to surfactin, an antimicrobial lipopeptide surfactant produced by B.subtilis. Also required for swarming motility. Not induced by surfactin. A SwrC-deficient strain is susceptible to acriflavine and ethidium bromide, and showed severer growth inhibition as surfactin concentration increased up to 100ug/ml. Belongs to the resistance-nodulation-cell division (RND) (TC 2.A.6) family.