Required for the proteolytic cleavage of the transcriptional repressor RIM101 in response to alkaline ambient pH, which is necessary for sporulation and invasive growth. May act as a scaffold protein that recruits the calpain-like protease RIM13 via SNF7 to its substrate RIM101. Interacts with SNF7 with its BRO1 domain. Interacts with RIM101 with its C-terminal domain, probably binding to its two YPX[LI] motifs. Present with 2881 molecules/cell in log phase SD medium. Belongs to the palA/RIM20 family.