Seven novel point mutations in the uroporphyrinogen decarboxylase (UROD) gene in patients with familial porphyria cutanea tarda (f-PCT).

M. D. Cappellini, F. Martinez di Montemuros, D. Tavazzi, S. Fargion, A. Pizzuti, A. Comino, T. Cainelli, G. Fiorelli

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Abstract

In this work, we describe seven novel molecular defects in the uroporphyrinogen decarboxylase gene responsible for familial porphyria cutanea tarda in Italian subjects with reduced erythrocyte URO-D activity. Four of these molecular abnormalities (R142Q, L161Q, S219F, P235S) are missense mutations, one (Q206X) is a nonsense mutation, one (IVS8-1 G>C) is a splicing defect causing the exon 9 deletion and one (1107 G>A) is located in the 3' untranslated region of UROD gene. All the amino acid substitutions fall in conserved regions in several organisms suggesting an important role in catalysis or in the protein structure stabilization. Three of these mutations have been detected in more than one subject. These results suggest a molecular heterogeneity at the UROD locus in Italian PCT patients although recurrent mutations have been identified.

Original languageEnglish
Pages (from-to)350
Number of pages1
JournalHuman Mutation
Volume17
Issue number4
Publication statusPublished - Apr 2001

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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    Cappellini, M. D., Martinez di Montemuros, F., Tavazzi, D., Fargion, S., Pizzuti, A., Comino, A., Cainelli, T., & Fiorelli, G. (2001). Seven novel point mutations in the uroporphyrinogen decarboxylase (UROD) gene in patients with familial porphyria cutanea tarda (f-PCT). Human Mutation, 17(4), 350.