Protein involved in proteolytic activation of Rim101p; part of response to alkaline pH; interaction with the ESCRT-III subunit Snf7p suggesting a relationship between the pH response and multivesicular body (MVB) formation; localizes to the cytoplasm under acidic conditions and to endosomes under alkaline conditions; also observed in peroxisomes and in the nucleus in HTP studies; PalA/AIP1/Alix family member homologous to Bro1p, contains an N-terminal banana-shaped Bro1 domain