ADSL
Function
Catalyzes two non-sequential steps in de novo AMP synthesis: converts (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamido)succinate (SAICAR) to fumarate plus 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide, and thereby also contributes to de novo IMP synthesis, and converts succinyladenosine monophosphate (SAMP) to AMP and fumarate.
Involvement in disease
Adenylosuccinase deficiency
ADSLD
An autosomal recessive disorder characterized by the accumulation in the body fluids of succinylaminoimidazole-carboxamide riboside (SAICA-riboside) and succinyladenosine (S-Ado). Most children display marked psychomotor delay, often accompanied by epilepsy or autistic features, or both, although some patients may be less profoundly retarded. Occasionally, growth retardation and muscular wasting are also present.
None
The disease is caused by variants affecting the gene represented in this entry.
Pathway
Purine metabolism; AMP biosynthesis via de novo pathway; AMP from IMP: step 2/2.
Purine metabolism; IMP biosynthesis via de novo pathway; 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide from 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate: step 2/2.
Sequence Similarities
Belongs to the lyase 1 family. Adenylosuccinate lyase subfamily.
Tissue Specificity
Ubiquitously expressed. Both isoforms are produced by all tissues. Isoform 2 is 10-fold less abundant than isoform 1.
Alternative names
AMPS, ADSL, Adenylosuccinate lyase, ASL, Adenylosuccinase, ASase