Enables protein C-terminus binding activity. Predicted to be involved in several processes, including microtubule cytoskeleton organization; negative regulation of Rac protein signal transduction; and regulation of microtubule polymerization or depolymerization. Predicted to act upstream of or within blastocyst hatching. Located in cytosol; neuron projection; and perinuclear region of cytoplasm. Orthologous to human STMN3 (stathmin 3). [provided by Alliance of Genome Resources, Apr 2022]