Predicted to enable GTP binding activity and hydrolase activity. Predicted to be involved in axonemal dynein complex assembly. Predicted to act upstream of or within single fertilization. Predicted to be located in cytoplasm. Predicted to be active in cytosol. Human ortholog(s) of this gene implicated in primary ciliary dyskinesia 28. Orthologous to human SPAG1 (sperm associated antigen 1). [provided by Alliance of Genome Resources, Apr 2022]