Mucopolysaccharidosis IVA: a novel splice acceptor site mutation in intron 4 of the N-acetylgalactosamine-6-sulfate sulfatase gene in an Afghanistan girl with classical Morquio disease

Jpn J Hum Genet. 1997 Jun;42(2):317-22. doi: 10.1007/BF02766953.

Abstract

We report here a novel splice site mutation in intron 4 of the gene for N-acetylgalactosamine-6-sulfate sulfatase (GALNS) in an Afghanistan girl with severe mucopolysaccharidosis IVA (classical Morquio disease). Direct sequencing revealed a homozygous G to A transition in the conserved splice acceptor site in intron 4 (cagG-->caaG: designated IVS 4(-I) G-->A) which eliminates 144 nucleotides of exon 5 in her GALNS transcript and introduces an immediate premature termination codon (at Trp 141 of exon 4). The IVS 4(-1) G-->A has not been seen in other populations and this is the first report of the molecular basis of classical Morquio disease in an Afghanistan patient.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Afghanistan
  • Child
  • Chondroitinsulfatases / genetics*
  • Female
  • Humans
  • Mucopolysaccharidosis IV / genetics*
  • Mutation*
  • Polymerase Chain Reaction

Substances

  • Chondroitinsulfatases
  • GALNS protein, human