Enables beta-tubulin binding activity. Involved in several processes, including negative regulation of cell growth involved in cardiac muscle cell development; negative regulation of glycine import across plasma membrane; and ovulation. Located in cytoplasm; cytoplasmic side of plasma membrane; and neuron projection. Biomarker of bladder disease (multiple); glomerulosclerosis; hypertension; liver cirrhosis; and opioid abuse. Orthologous to human RGS2 (regulator of G protein signaling 2). [provided by Alliance of Genome Resources, Apr 2022]