Enables transforming growth factor beta receptor binding activity. Acts upstream of or within negative regulation of transforming growth factor beta receptor signaling pathway. Predicted to be located in membrane. Is expressed in limb mesenchyme; lung; musculoskeletal system; sensory organ; and vibrissa. Orthologous to human RASL11B (RAS like family 11 member B). [provided by Alliance of Genome Resources, Apr 2022]