Adenylosuccinate Lyase Deficiency. (Adenylosuccinase Deficiency ; Adenylosuccinate monophosphate lyase deficiency) is a rare autosomal recessive disease caused by a mutation in the ADSL gene which codes for adenylosuccinate lyase. A deficiency in this enzyme results in accumulation of succinyladenosine in plasma, spinal fluid, and urine. Symptoms, which present at birth, include hyptonia, seizures, mental retardation, and encephalopathy. Treatment includes allopurinol.
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