Protein that regulates the vacuolar V-ATPase; regulates the assembly state of the V-ATPase holoenzyme, promoting complex disassembly, and counteracting the function of the RAVE complex; interacts with V-ATPase subunits; vacuolar membrane localization requires N-myristoylation and an assembled V-ATPase; GFP-fusion protein localizes to the cytoplasm; null mutation suppresses cdc13-1 temperature sensitivity; member of a conserved family of TLDc domain proteins found in eukaryotes