Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the genetic changes related to Griscelli syndrome ?
    ### Response:
    The three types of Griscelli syndrome are caused by mutations in different genes: Type 1 results from mutations in the MYO5A gene, type 2 is caused by mutations in the RAB27A gene, and type 3 results from mutations in the MLPH gene.  The proteins produced from these genes are found in pigment-producing cells called melanocytes.
    