Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) PURA syndrome ?
    ### Response:
    PURA syndrome is a neurodevelopmental disorder characterized by mild to moderate developmental delay, learning disability, seizures and seizure-like movements, low muscle tone (hypotonia), feeding difficulties, and breathing problems. PURA syndrome occurs when one of a person's two copies of the PURA gene, located on chromosome 5, does not function normally.
    