The spectrum of mutations causing HPRT deficiency: An update

H. A. Jinnah, J. C. Harris, W. L. Nyhan, J. P. O'Neill

Research output: Contribution to journalArticlepeer-review


Mutations in the gene encoding hypoxanthine-guanine phosphoribosyltransferase (HPRT) cause Lesch-Nyhan disease, which is characterized by hyperuricemia, severe motor disability, and self-injurious behavior. Mutations in the same gene also cause less severe clinical phenotypes with only some portions of the full syndrome. A large database of 271 mutations associated with both full and partial clinical phenotypes was recently compiled. Since the original database was assembled, 31 additional mutations have been identified, bringing the new total to 302. The results demonstrate a very heterogeneous collection of mutations for both LND and its partial syndromes. The differences between LND and the partial phenotypes cannot be explained by differences in the locations of mutations, but the partial phenotypes are more likely to have mutations predicted to allow some residual enzyme function. The reasons for some apparent exceptions to this proposal are addressed.

Original languageEnglish (US)
Pages (from-to)1153-1160
Number of pages8
JournalNucleosides, Nucleotides and Nucleic Acids
Issue number8-9
StatePublished - Dec 23 2004


  • Diagnostic testing
  • Genotype-phenotype correlation
  • Kelley-Seegmiller syndrome

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Genetics

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