Enables small GTPase binding activity. Predicted to be involved in several processes, including Ras protein signal transduction; positive regulation of protein ubiquitination; and protein stabilization. Predicted to be located in cytoplasm and microtubule. Predicted to be active in microtubule cytoskeleton and nucleus. Is expressed in liver and metanephros. Human ortholog(s) of this gene implicated in breast cancer; reproductive organ cancer (multiple); transitional cell carcinoma; and urinary system cancer (multiple). Orthologous to human RASSF1 (Ras association domain family member 1). [provided by Alliance of Genome Resources, Apr 2022]