Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Dentatorubral-pallidoluysian atrophy ?
    ### Response:
    What causes dentatorubral-pallidoluysian atrophy (DRPLA)? DRPLA is caused by a mutation in the ATN1 gene. This gene provides instructions for making a protein called atrophin 1. Although the function of atrophin 1 is unclear, it likely plays an important role in nerve cells (neurons) in many areas of the brain.
    