Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to hereditary sensory and autonomic neuropathy type V ?
    ### Response:
    Mutations in the NGF gene cause HSAN5. The NGF gene provides instructions for making a protein called nerve growth factor beta (NGF) that is important in the development and survival of nerve cells (neurons), including sensory neurons. The NGF protein functions by attaching (binding) to its receptors, which are found on the surface of neurons.
    