4.3.2.2 evolution the enzyme structurally resembles the enzymes of the aspartase/fumarase superfamily, conserved flexible C3 loop, phylogenetic analysis 729717 4.3.2.2 evolution the enzyme structure adheres to the fold of the enzymes of the aspartase/fumarase superfamily, conserved flexible C3 loop, phylogenetic analysis 729717 4.3.2.2 malfunction a defect in the colonization phenotype is attributed to the disruption in adenylosuccinate lyase 709768 4.3.2.2 malfunction adenylosuccinate lyase deficiency causes encephalopathy with epilepsy and marked psychomotor retardation 708545 4.3.2.2 malfunction adenylosuccinate lyase deficiency is characterized by the accumulation of 5-aminoimidazole-4-(N-succinylcarboxamide) ribonucleotide and succinyladenosine in tissue and body fluids 710131 4.3.2.2 malfunction ADSL deficiency is an autosomal recessive disorder, characterized by severe neurologic involvement including seizures, developmental delay, hypotonia, and autistic features 710076 4.3.2.2 malfunction ADSL enzyme deficiency is a disorder of purine metabolism with a broad clinical spectrum. The enzyme deficit causes a highly variable clinical presentation varying from a relatively mild presentation with slight motor retardation and severe muscle hypotonia to severe neonatal onset convulsions accompanied by severe mental retardation 730526 4.3.2.2 malfunction enzyme mutation R303C is involved in ADSL deficiency, a rare autosomal recessive disorder, which causes a defect in purine metabolism resulting in neurological and physiological symptoms. The R303C mutation potentially has a disproportional decrease in activity toward its substrates 729218 4.3.2.2 malfunction knockdown of adenylosuccinate lyase causes small increases in AMP, ADP and ATP levels. It does not result in decreases in other adenine nucleotides 747484 4.3.2.2 malfunction missense mutations in the protein lead to enzyme deficiency, an inborn error of purine metabolism characterized by neurological and physiological symptoms. Enzyme deficiency is biochemically diagnosed by elevated levels of succinylaminoimidazolecarboxamide riboside and succinyladenosine, the dephosphorylated derivatives of the substrates. Succinyladenosine/succinylaminoimidazolecarboxamide riboside ratios are associated with three phenotypic groups 729296