Predicted to enable GTPase activator activity. Predicted to be involved in positive regulation of trophoblast cell migration and regulation of cytoskeleton organization. Predicted to act upstream of or within several processes, including labyrinthine layer blood vessel development; synaptic vesicle docking; and synaptonemal complex assembly. Predicted to be located in cerebellar mossy fiber; cytosol; and synaptic membrane. Orthologous to human SYDE1 (synapse defective Rho GTPase homolog 1). [provided by Alliance of Genome Resources, Apr 2022]