Predicted to enable GTPase activator activity. Predicted to be involved in activation of GTPase activity and intracellular protein transport. Is expressed in several structures, including alimentary system; cranial ganglion; genitourinary system; limb segment; and sensory organ. Orthologous to human TBC1D8 (TBC1 domain family member 8). [provided by Alliance of Genome Resources, Apr 2022]