Predicted to enable isoprenoid binding activity; small GTPase binding activity; and zinc ion binding activity. Predicted to contribute to Rab geranylgeranyltransferase activity. Predicted to be involved in protein geranylgeranylation. Predicted to be part of Rab-protein geranylgeranyltransferase complex. Is expressed in several structures, including central nervous system; genitourinary system; liver; stomach; and thymus. Orthologous to human RABGGTB (Rab geranylgeranyltransferase subunit beta). [provided by Alliance of Genome Resources, Apr 2022]