Voltage dependent anion channel required for acidification and functions of the Golgi apparatus that may function in counter-ion conductance (PubMed:18794847). Plays a role in lymphocyte development, probably by acting as a RABL3 effector in hematopoietic cells (By similarity). Homotrimer (PubMed:18794847). Interacts with RABL3; the interaction stabilizes GPR89B (By similarity). Ubiquitous. Does not seem to be able to bind GTP. Belongs to the Golgi pH regulator (TC 1.A.38) family. Truncated C-terminus.