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Severe phosphoribosylpyrophosphate synthetase superactivity

Disease definition

A severe form of phosphoribosylpyrophosphate (PRPP) synthetase superactivity, an X-linked disorder of purine metabolism, characterized by early onset hyperuricemia and hyperuricosuria, and clinically manifesting with urolithiasis, gout and neurodevelopmental anomalies consisting of variable combinations of sensorineural hearing loss, hypotonia, and ataxia.


Classification level: Subtype of disorder
  • Synonym(s):
    • Severe PRPP synthetase superactivity
    • Severe PRPS1 superactivity
  • Prevalence: <1 / 1 000 000
  • Inheritance: X-linked recessive 
  • Age of onset: Infancy, Childhood, Neonatal
  • ICD-10: E79.8
  • OMIM: 300661
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -

Detailed information


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