Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) adenine phosphoribosyltransferase deficiency ?
    ### Response:
    Adenine phosphoribosyltransferase (APRT) deficiency is an inherited condition that affects the kidneys and urinary tract. The most common feature of this condition is recurrent kidney stones; urinary tract stones are also a frequent symptom. Kidney and urinary tract stones can create blockages in the urinary tract, causing pain during urination and difficulty releasing urine.
    